2021 GMC Sierra 3500 HD Ignition and Tune-Up Products

Name: Diesel Engine Glow Plug: High Intensity Concentrated Heat, Reliable Starts
Brand: Autolite
SKU: 1120
Price: 14.99 USD
Rating: 3.0 (15 reviews)

Below you will find various in-demand GMC Ignition and Tune-Up Products, components and accessories for your 2021 Sierra 3500 HD. Advance Auto Parts has popular Sierra 3500 HD parts like Spark Plugs, Ignition Coils and Boots, Ignition Wires and more. You’ll also find aftermarket and OEM Ignition and Tune-Up Products for other Sierra 3500 HD model years including 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2022, 2023 and more. Select a category of 2021 GMC Sierra 3500 HD Ignition and Tune-Up Products below and start saving instantly.

Popular 2021 GMC Sierra 3500 HD Ignition and Tune-Up Products Categories

Spark Plugs

Ignition Coils

Diesel Glow Plugs

Standard Spark Plug Wires

Knock Sensors

Ignition Starter Switches

Single Spark Plug Wires

Essential Ignition and Tune-Up Products for 2021 GMC Sierra 3500 HDs

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$14.99

Starting a diesel engine? Check out Autolite glow plugs. They’re dependable and long-lasting, the perfect plug for a variety of diesel applications. Diesel engines depend on high heat in the combustion chamber to ignite the fuel. When you cold start a diesel engine, there isn’t enough heat to ignite. Autolite glow plugs warm the combustion chamber to start the fuel ignition, reaching temperatures hot enough to start in 30 seconds or less. If you’re experiencing problems starting your diesel engine, it may have burnt out glow plugs. For dependability and long-lasting performance, use Autolite glow plugs.

Product Features:

Diesel engines depend on high heat in the combustion chamber to ignite the fuel. When you cold start a diesel engine, there isn’t enough heat to ignite. Glow plug warms the combustion chamber to start the fuel ignition.
These glow plugs fit a variety of diesel applications. If you’re experiencing problems starting your diesel engine, it may have burnt out glow plugs.
Reaches temperatures hot enough to start in 30 seconds or less
For dependability and long-lasting performance, use Autolite glow plugs
High Intensity Concentrated Heat: Autolite glow plugs generate intense heat to ensure reliable ignition in diesel engines, even in cold conditions.
Durable Construction: Engineered to withstand the rigors of diesel engine operation, providing consistent performance over time.

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$34.99

GM Genuine Parts Diesel Glow Plugs are designed, engineered, and tested to rigorous standards, and are backed by General Motors. GM Genuine Parts are the true OE parts installed during the production of or validated by General Motors for GM vehicles. Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE).

Product Features:

Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE)
GM Genuine Parts are designed, engineered and tested to rigorous standards, and are backed by General Motors
GM Engineers design and validate OE parts specifically for your Chevrolet, Buick, GMC, or Cadillac vehicle
GM regularly updates production and service part designs to integrate new materials and technologies

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$18.99

NGK metal glow plugs are trusted by OEM diesel engine manufacturers around the world to perform under the harshest conditions. NGK metal glow plugs are equipped with a heating coil in a glow rod made of heat-resistant magnesium oxide between the heating and regulating coils. Magnesium oxide is an outstanding thermal conductor (quickly dissipating heat), while protecting the heating coils from vibration and shock. NGK metal glow plugs feature excellent gas-tight sealing qualities that deliver superior electrical insulation and protection against combustion gas. NGKs metal composition helps reduce carbon accumulation to prevent short circuits, while the unique shell design provides excellent heat transfer.

Product Features:

ACTUAL OE or EQUIVALENT DESIGN: OEM quality construction metal glow plug
SUPERIOR DURABILITY: Metal glow plugs are designed to withstand thermal shock due to quick changes in temperature
FAST HEATING PERFORMANCE: Fast heat up enables smooth engine starts even in extreme weather conditions
CLEAN PERFORMANCE: Constant afterglow temperature minimize noxious pollutants
RECOMMENDED USAGE: Best for diesel engines with OE metal glow plugs

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$20.99

GM Genuine Parts Diesel Glow Plugs are designed, engineered, and tested to rigorous standards, and are backed by General Motors. These true OE parts, which may have formerly appeared as ACDelco GM Original Equipment (OE), are specifically designed and validated by GM engineers for your Chevrolet, Buick, GMC, or Cadillac vehicle. GM regularly updates production and service part designs to integrate new materials and technologies, ensuring optimal performance and reliability. Featuring a conical seat type, these glow plugs are essential for achieving optimal cold starts in your diesel engine.

Product Features:

Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE)
GM Genuine Parts are designed, engineered and tested to rigorous standards, and are backed by General Motors
GM Engineers design and validate OE parts specifically for your Chevrolet, Buick, GMC, or Cadillac vehicle
GM regularly updates production and service part designs to integrate new materials and technologies
Engineered for Optimal Cold Starts: Designed to ensure your diesel engine starts smoothly in cold conditions, providing reliable performance when you need it most.
Conical Seat Type: Features a conical seat type for a precise fit and optimal function in your diesel engine.

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$51.99

GM Genuine Parts Ignition Starter are designed, engineered, and tested to rigorous standards, and are backed by General Motors. It is a multi-position switch that activates the ignition, accessory, and cranking circuits in your vehicle. GM Genuine Parts are the true OE parts installed during the production of or validated by General Motors for GM vehicles. Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE).

Product Features:

Work with vehicle electronics to help optimize vehicle capabilities
Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE)
GM Genuine Parts are designed, engineered and tested to rigorous standards, and are backed by General Motors
GM Engineers design and validate OE parts specifically for your Chevrolet, Buick, GMC, or Cadillac vehicle
GM regularly updates production and service part designs to integrate new materials and technologies

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$61.99

CARQUEST premium engine management products provide the right products for a wide range of domestic and import applications. Delivering the highest performance and durability under demanding conditions.

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$36.99

Ignition Switch

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$42.99

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$78.99

NGK ultra-low resistance mag core wire sets provide outstanding performance and durability. High-temp premium silicone outer jacket and inner EPDM/silicone insulation contain high voltage currents for excellent dielectric strength. Stainless steel winding

Product Features:

PERFECT FIT FOR YOUR VEHICLE: Built to OEM tolerances with OE quality or better materials
BUILT TO LAST: Outer Jacket built to withstand temperatures greater than 250 degrees C, inner insulation EPDM or silicone for best dielectric strength
STAINLESS STEEL TERMINALS: Provide the highest possible retention to ensure positive connections through the life of the set
CYLINDER LEAD ID: Cylinder lead identification tags where possible make installation easier

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$73.99

Product Features:

SAEJ2031 Class E cable resist heat (428 Deg. F), cold (-104 Deg. F), electrical interference, abrasion and oil.
Stainless steel magnetic winding delivers maximum voltage to the spark plug for more powerful, and longer spark resulting in optimum engine performance while reducing the chance for misfire, and eliminating radio static.
100% Pure silicone external insulation resists oil penetration, for lifetime protection against wire set failure.
EPDM inner insulation stops power-robbing voltage leaks.
With Magnetic-impregnated Kevlar internal conductors – durable and break resistant
Engineered to meet OEM tolerances using variable pitch wire winding, creating better resistance to electric magnetic interference (E.M.I resistance).
Excellent interference suppression and consistent performance
Easy lock terminals for more convenient installation.
Thick silicon outer jacket for excellent heat resistance. Insulating EPDM based compound inner jacket helps minimize voltage drop and enhance durability.
Broad coverage available for most vehicles on the road today
Include grease pack to ensure easy installation and removal

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$73.47

The Karlyn Ignition Wire Set incorporates two layers of high grade silicone for superior heat and voltage protection. The double extruded Silicone-over-Silicone wire contains 19 strands of tinned copper core which provides super conductivity and corrosion resistance.

Product Features:

OE-Equivalent.
OEM style connectors for easy Installation.
Resistant to high temperatures, corrosion and vibration.
Ignition noise suppressed.
Includes O.E. Type Connectors, Looms, Sensors and Harness Clips when required

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$65.22

Ignition Wire Set

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$103.99

NGK ignition coils are manufactured to meet or exceed OE standards for the highest durability and operational performance, so they can be installed with confidence. NGK and their family of automotive products have over 80 year’s experience and are driven by extreme dedication to innovation, performance and quality. Developed and rigorously tested in our ISO 17025 accredited test lab under the most extreme conditions, NGK’s coil designs will outperform all others – far beyond operational environments a vehicle would actually experience

Product Features:

OE QUALITY: Vacuum-sealed premium epoxy resin and thermoplastic coil housings provide superior dielectric strength, voltage insulation and durability
OPTIMAL PERFORMANCE: Precision coil windings and laminations maximize outputs, custom NGK ASIC chipset optimizes efficiency, prevents component damage
EASE OF INSTALLATION: NGK Ignition Coils include ignition control module, premium high temperature coil boot, and jumper harnesses where required
THE NGK DIFFERENCE: Featuring superior materials and design enhancements.
EXTENSIVE TESTING: NGK ignition coils must pass extreme testing during manufacturing to ensure the highest quality and durability standards are met
PRODUCT ENGINEERING: Advanced flow and stress modeling systems preemptively identify and avoid common failure points found in OE and competitor coils

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$549.99

Looking to replace your worn out LS coils with a more efficient upgrade? The new MSD Blaster LS Coil line is ideal for your modern GM muscle car or truck. The coils are designed as a bolt-in replacement yet have been thoroughly tested and detailed by our experienced engineering team. The improved efficiency of these Blaster Coils will give your LS the ignition boost you’re looking for.

Product Features:

Replacement Coil
Full One Year Warranty

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$85.99

OE QUALITY: Vacuum-sealed premium epoxy resin and thermoplastic coil housings provide superior dielectric strength, voltage insulation and durability
OPTIMAL PERFORMANCE: Precision coil windings and laminations maximize outputs, custom NGK ASIC chipset optimizes efficiency, prevents component damage
EASE OF INSTALLATION: NGK Ignition Coils include ignition control module, premium high temperature coil boot, and jumper harnesses where required
THE NGK DIFFERENCE: Featuring superior materials and design enhancements.
EXTENSIVE TESTING: NGK ignition coils must pass extreme testing during manufacturing to ensure the highest quality and durability standards are met
PRODUCT ENGINEERING: Advanced flow and stress modeling systems preemptively identify and avoid common failure points found in OE and competitor coils

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$55.99

Carquest ignition coils meet original equipment (OE) fit, form and function and are built to ensure reliable starting and performance. Carquest ignition coils are tested to ensure proper spark and perfect fit for each application. These ignition coils are an affordable repair choice to restore the vehicle¿s ignition system performance. Carquest ignition coils are part of our Carquest Vehicle Solutions, which is a full line of engine management and electronics products that help control ignition, fuel delivery and emission systems. Carquest Vehicle Solutions are OE-quality parts designed, engineered and tested by world-class manufacturers to ensure a reliable and long-lasting repair.

Product Features:

Long service life and durable performance
High dielectric strength for reliability
Corrosion-resistant connections
Carquest Vehicle Solutions Technical Support available from ASE certified technicians: 1-866-687-5413
High reliability
Long service life

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$29.99

ACDelco GM Original Equipment Ignition Knock (Detonation) Sensors monitor the engine for pinging or spark knock, and are GM-recommended replacements for your vehicle’s original components. These sensors create a voltage signal based on the vibrations caused by erratic air/fuel mixture combustion; the engine control module uses these signals to adjust the ignition timing and air/fuel mixture. These original equipment ignition knock sensors have been manufactured to fit your GM vehicle, providing the same performance, durability, and service life you expect from General Motors.

Product Features:

Sends signals to the engine control module (ECM) to adjust timing
Helps prevent damage to the engine caused by pre-ignition
GM-recommended replacement part for your GM vehicle’s original factory component
Offering the quality, reliability, and durability of GM OE
Manufactured to GM OE specification for fit, form, and function

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$26.99

Carquest Knock Sensors respond to a wide range of engine knock frequencies providing accurate engine condition to the ECM for optimal ignition timing. Highest quality piezoceramic element manufactured to tight tolerances for increased durability. All MotoRad Knock Sensors are designed to meet or exceed OEM specifications at our ISO TS16949 manufacturing facilities.

Product Features:

Precision piezoceramic element ensures accurate response to a wide range of engine vibrations
Manufactured using the highest quality OEM materials to ensure optimal performance and rugged durability
Designed to meet or exceed all OEM specifications in fit, form & function
Extensive product testing includes salt spray, high/low temperature impact, thermal cycling, vibration, drop among other tests, to ensure all sensors meet or exceed OEM specifications.

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$33.99

Encore Automotive Genuine OE knock sensor detects excessive/unusual pulses caused by the engine ignition and makes proper adjustments to reduce the risk of damaging pistons. Encore Automotive is dedicated to bringing the latest original equipment technologies to the Aftermarket to provide the highest overall value.

Product Features:

Genuine OE Part
Highly accurate engine vibration detection
Excellent material quality

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$23.99

Carquest premium engine management products provide the right products for a wide range of domestic and import applications. Delivering the highest performance and durability under demanding conditions.

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$28.99

ACDelco GM Original Equipment Spark Plug Wires consist of a single wire, encased in an insulating material, connectors, and insulating boots, and are GM-recommended replacements for your vehicle’s original components. The wires transfer high voltage pulses between the voltage source, the distributor, and the spark plug. These original equipment wires have been manufactured to fit your GM vehicle, providing the same performance, durability, and service life you expect from General Motors.

Product Features:

Durable to help transfer high voltage pulses without damage
GM-recommended replacement part for your GM vehicle’s original factory component
Offering the quality, reliability, and durability of GM OE
Manufactured to GM OE specification for fit, form, and function

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$17.99

GM Genuine Parts Genuine GM Spark Plug Wires are designed, engineered, and tested to rigorous standards, and are backed by General Motors. These wires are a single wire encased in an insulating material, and contains connectors and insulating boots. It transfers high voltage pulses between the voltage source, the distributor, and your vehicle’s spark plug. GM Genuine Parts are the true OE parts installed during the production of or validated by General Motors for GM vehicles. Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE).

Product Features:

Durable to help transfer high voltage pulses without damage
Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE)
GM Genuine Parts are designed, engineered and tested to rigorous standards, and are backed by General Motors
GM Engineers design and validate OE parts specifically for your Chevrolet, Buick, GMC, or Cadillac vehicle
GM regularly updates production and service part designs to integrate new materials and technologies

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$10.99

NGK Iridium IX spark plugs are specifically designed for the performance enthusiast. Iridium IX provides outstanding acceleration, high fuel efficiency and durability. NGK Iridium IX plugs offer extreme ignitability and exceptional anti-fouling. Tapered cut ground electrode provides improved starting, idling and throttle response. The Iridium fine wire center electrode’s durability is six times harder than platinum. Iridium alloy’s extremely high melting point is perfect for today’s engines. For even greater performance consider upgrading to an NGK Ruthenium HX plug.

Product Features:

SINGLE IRIDIUM TIP: Fine wire 0.6 millimeter iridium tip center electrode ensures high durability and a consistently stable spark
IRIDIUM ALLOY CENTER ELECTRODE: Iridium’s density (6x that of platinum) and extremely high melting point is perfect for modern high efficiency engines
TAPERED CUT GROUND ELECTRODE: Reduced quenching design produces outstanding ignitability, improved acceleration, fuel efficiency and durability
SOLID COPPER CORE: 98% pure copper core offers superior heat dissipation, conductivity and ultra wide heat ranges
TRIVALENT METAL PLATING: Delivers superior anti-corrosion and anti-seizing properties, ensuring ease of installation and removal
RECOMMENDED USAGE: Modified or high performance applications, or as an upgrade to OE nickel alloy spark plugs
Outstanding Acceleration and High Fuel Efficiency: NGK Iridium IX spark plugs are engineered to deliver superior acceleration and enhance fuel efficiency, making them ideal for performance enthusiasts.
Extreme Ignitability and Anti-Fouling: These spark plugs offer exceptional ignitability and anti-fouling properties, ensuring reliable performance and longevity.

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$12.35

The DENSO Iridium Long Life spark plug was specifically designed for long service life and consistent performance in the latest, most advanced production cars DENSO’s patented iridium alloy is more durable than even platinum, allowing the center electrode to be shrunk to only 0.7mm in diameter. This produces a dramatic improvement in ignitability and spark plug life. Closely related to platinum and exhibiting even tougher qualities, the rare metal iridium is an ideal material for spark plugs. A fine-wire, 0.7mm iridium center electrode is 360-degree laser welded in place using an exclusive DENSO process, and then matched to a platinum ground electrode. This pair of precision-formed, premium-metal electrodes dramatically extends the plug’s useful life.

Product Features:

Fine-wire iridium center electrode
Platinum ground electrode
360 degree laser-welded spark tip
Sustained spark performance over 100,000 miles
Withstands higher pressures and temperatures

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$7.99

ACDelco Gold (Professional) RAPIDFIRE Spark Plugs are a high quality alternative to Original Equipment (OE) parts. These RAPIDFIRE Single Platinum Performance Spark Plugs are designed for everyday use and are a high quality replacement for many vehicles on the road today. These premium aftermarket spark plugs have high-quality suppressors that help prevent misfiring, an improved plug to boot seal, and a pure copper core for greater durability. These premium aftermarket replacement spark plugs are manufactured to meet your expectations for fit, form, and function. ACDelco Gold (Professional) parts are manufactured to meet your expectations for fit, form, and function, making them a smart choice for General Motors vehicles, as well as most makes and models, including special applications. These high-quality parts are backed by General Motors. Some ACDelco Gold parts may have formerly appeared as ACDelco Professional.

Product Features:

Solid state suppressor, with two-piece glass and brass seal, can help reduce radio frequency interference, regulates spark energy for long electrode life, and helps protect against high combustion pressures
Pure copper core provides great heat transfer and helps maximize plug durability
Platinum on center electrode enables superior spark characteristics and can reduce voltage requirements of the ignition system
Ribless insulator helps optimize plug to boot seal
Some ACDelco Gold parts may have formerly appeared as ACDelco Professional
Premium aftermarket replacement part
Manufactured to meet specifications for fit, form, and function for General Motors vehicles as well as most makes and models

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$3.29

Motorcraft Spark Plugs are original equipment on Ford Motor Company vehicles engineered to meet strict Ford engineering standards to provide original equipment performance and reliability. Delivering performance, reliability and confidence, Motorcraft spa

Product Features:

Motorcraft spark plugs are matched to specific engines to provide enhanced durability, eliminate misfires, reduce fuel consumption and optimize emissions.
Backed by Motorcraft’s Service Parts Warranty
Exact fit for Ford, Lincoln and Mercury vehicles
Resistant to oxidation and arc erosion.
Multi-rib insulator protects against misfire.
Service intervals of up to 100,000 miles.
Motorcraft Spark Plugs are designed with high quality materials to provide reliable performance for almost any application.
Motorcraft Spark Plugs are what was in the vehicle when it was manufactured
Motorcraft ignition components help prevent false check engine lights.

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$8.29

NGK G-Power Platinum spark plugs are the best single platinum spark plugs at an economical price. G-Power plugs feature a fine wire platinum center electrode and a trapezoidal cut ground electrode that offers increased durability, improved fuel efficiency, lower emissions, faster starts and quicker acceleration over conventional nickel spark plugs. An excellent upgrade for vehicles which used nickel alloy spark plugs originally. For better performance consider upgrading to a NGK Iridium IX plug. For even greater performance consider upgrading to a NGK RUTHENIUM HX plug.

Product Features:

SINGLE PLATINUM TIP: Fine wire 0.6 millimeter platinum tip center electrode ensures improved durability and a consistently stable spark
PLATINUM ALLOY: G-Power platinum provides exceptional value with increased performance and longer service intervals than factory nickel plugs
TRAPEZOIDAL CUT GROUND ELECTRODE: Reduces quenching design produces improved ignitability and performance
SOLID COPPER CORE: 98% pure copper core offers superior heat dissipation, conductivity and ultra wide heat ranges
COLD-ROLLED THREADS: Prevents cross-threading and damage to cylinder heads
RECOMMENDED USAGE: Lower cost alternative to double precious metal spark plugs or as an upgrade to OE nickel alloy spark plugs
Enhanced Vehicle Performance: Experience faster starts and quicker acceleration compared to conventional nickel spark plugs, making it an excellent upgrade for vehicles originally using nickel alloy spark plugs.
Economical Upgrade: NGK G-Power Platinum spark plugs provide a cost-effective solution for upgrading your vehicle’s spark plugs without compromising on quality.
Compatibility and Versatility: Ideal for a wide range of vehicles, these spark plugs are a perfect fit for those looking to replace their nickel alloy spark plugs with a more durable and efficient option.

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$11.99

SINGLE IRIDIUM TIP: Fine wire 0.6 millimeter iridium tip center electrode ensures high durability and a consistently stable spark
IRIDIUM ALLOY CENTER ELECTRODE: Iridium’s density (6x that of platinum) and extremely high melting point is perfect for modern high efficiency engines
TAPERED CUT GROUND ELECTRODE: Reduced quenching design produces outstanding ignitability, improved acceleration, fuel efficiency and durability
SOLID COPPER CORE: 98% pure copper core offers superior heat dissipation, conductivity and ultra wide heat ranges
TRIVALENT METAL PLATING: Delivers superior anti-corrosion and anti-seizing properties, ensuring ease of installation and removal
RECOMMENDED USAGE: Modified or high performance applications, or as an upgrade to OE nickel alloy spark plugs
Outstanding Acceleration and High Fuel Efficiency: NGK Iridium IX spark plugs are engineered to deliver exceptional acceleration and improved fuel efficiency, making them ideal for performance enthusiasts.
Extreme Ignitability and Anti-Fouling: These spark plugs offer extreme ignitability and exceptional resistance to fouling, ensuring reliable performance in various driving conditions.

Upgrade your 2021 GMC Sierra 3500 HD with Top-Quality Ignition and Tune-Up Products

When it comes to maintaining or upgrading your 2021 GMC Sierra 3500 HD, nothing is more important than using high-quality OEM or aftermarket parts that you can trust. Whether you’re repairing damage to your GMC or enhancing its overall performance, Ignition and Tune-Up Products are key to keeping your Sierra 3500 HD functioning at its best. At Advance Auto Parts, we offer a wide selection of 26 Ignition and Tune-Up Products for the 2021 GMC Sierra 3500 HD, designed to meet your needs without breaking the bank. From Spark Plug replacements to Ignition Coils and Boots upgrades, we’ve got you covered with parts that fit your vehicle perfectly and ensure long-lasting performance.

Affordable Prices and Wide Selection

Shopping for Ignition and Tune-Up Products for any vehicle can be a hassle, especially if you’re on a budget. But with Advance Auto Parts, you can find high-quality Ignition and Tune-Up Products for your 2021 GMC Sierra 3500 HD at great prices. Our Ignition and Tune-Up Products inventory for this model ranges from just $6.49 to $137.99, with an average price of $40.54. Our 26 Ignition and Tune-Up Products in stock come from 11 trusted brands, so you’re sure to find the right part for your 2021 GMC Sierra 3500 HD without overspending.

Top Brands and High Customer Satisfaction

Advance Auto Parts takes pride in offering only the best brands in the automotive industry. For your 2021 GMC Sierra 3500 HD, we stock popular OEM and aftermarket Ignition and Tune-Up Products from top names like NGK, Autolite, E3, and more. NGK Ignition and Tune-Up Products start at just $8.29 and boast an impressive 5 stars average rating from customers. Autolite and E3 also bring quality to the table, with Ignition and Tune-Up Products available starting at $6.49, and at an average 5 stars rating. With 1,244 customer reviews and counting, our 2021 GMC Sierra 3500 HD Ignition and Tune-Up Products have a strong track record of reliability, ensuring you can trust your purchase.

Explore Related Parts and More

While you’re here, don’t forget to check out other essential categories that go hand in hand with Ignition and Tune-Up Product upgrades. Explore related part types like Batteries and Chargers, Oil and Lubricants and more to make sure your 2021 GMC Sierra 3500 HD is always ready to roll. We’re committed to providing you with everything you need to keep your Sierra 3500 HD in top shape, all in one place. Start shopping confidently below for your 2021 GMC Sierra 3500 HD!

Best-Selling Spark Plugs for 2021 GMC Sierra 3500 HDs

Enhance the driving experience in your GMC with 12 quality Spark Plug components, starting at $6.49.

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$14.99

NGK Ruthenium HX High Ignitability spark plugs are the best in class plug for todays modern vehicles. Patented Ruthenium technology offers the most advance tip technology and delivers the highest performance and life expectancy. Created from advanced OE technology as a high ignitability plug; Ruthenium HX spark plugs come with patented, specialized OEM DFE and PSPE tip designs. NGK Ruthenium HX High Ignitability spark plugs provide a more complete fuel burn resulting in a quicker throttle response, smoother idle and better cold starts. Ruthenium center electrode provides industry leading durability.

Product Features:

HIGH IGNITABILITY DOUBLE FINE ELECTRODE DESIGN: Combines 0.6 millimeter ruthenium center with opposed fine wire platinum ground electrode
RUTHENIUM ALLOY CENTER ELECTRODE: NGK’s patented ruthenium technology produces maximum performance, ignitability & durability at high temperatures
PLATINUM PIN TYPE GROUND ELECTRODE: Provides more complete fuel burn, quicker throttle response, smoother idle and better cold starts
SOLID COPPER CORE: 98% pure copper core offers superior heat dissipation, conductivity and ultra wide heat ranges
TRIVALENT METAL PLATING: Delivers superior anti-corrosion and anti-seizing properties, ensuring ease of installation and removal
RECOMMENDED USAGE: Modern vehicles using OE DFE type spark plugs or for those seeking an aftermarket plug with the latest OE technology
Specialized OEM Tip Designs: Features patented DFE and PSPE tip designs for superior ignitability.
Industry-Leading Durability: Ruthenium center electrode ensures exceptional durability and longevity.
Advanced OE Technology: Created from advanced Original Equipment technology for modern vehicles.

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$10.99

SINGLE IRIDIUM TIP: Fine wire 0.6 millimeter iridium tip center electrode ensures high durability and a consistently stable spark
IRIDIUM ALLOY CENTER ELECTRODE: Iridium’s density (6x that of platinum) and extremely high melting point is perfect for modern high efficiency engines
TAPERED CUT GROUND ELECTRODE: Reduced quenching design produces outstanding ignitability, improved acceleration, fuel efficiency and durability
SOLID COPPER CORE: 98% pure copper core offers superior heat dissipation, conductivity and ultra wide heat ranges
TRIVALENT METAL PLATING: Delivers superior anti-corrosion and anti-seizing properties, ensuring ease of installation and removal
RECOMMENDED USAGE: Modified or high performance applications, or as an upgrade to OE nickel alloy spark plugs
Outstanding Acceleration and High Fuel Efficiency: NGK Iridium IX spark plugs are engineered to deliver superior acceleration and enhance fuel efficiency, making them ideal for performance enthusiasts.
Extreme Ignitability and Anti-Fouling: These spark plugs offer exceptional ignitability and anti-fouling properties, ensuring reliable performance and longevity.

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$8.49

The Spark Plugs are the product of years of fundamental research in the combustion field. The unique patented electrode configuration of these new The spark plugs increases the amount of combustion pressure created during each power stroke of an engine, which results in a marked increase in power output, fuel economy, and reduced emissions in all gasoline engines. E3.74 is a 14mm, 1.000 reach plug with a taper seat. It fits a wide variety of late model applications, especially Ford applications. The automotive plugs have three legs securing the Diamond FIRE electrode to the shell. This allows for excellent heat transfer, and helps to create more turbulence in the cylinder. The patented Diamond FIRE side wire is proven to increase power, reduce fuel consumption and improve hydrocarbon emissions in long-term use.

Product Features:

E3’s Diamond Fire edge to edge ground electrode provides maximum performance with increased efficiency and a faster more complete burn
Smoother Acceleration & Idle – The faster flame initiated by the The spark plug results in a more complete burn of the ingested fuel charge. More pressure is created against the piston more fuel is put to work
Energy – Power output improved up to 6% on average in the typical operating ranges. Results will vary.
Efficiency – The “diamond shaped” side wire electrode projects the combustion spark in a way that more quickly ignites the air/fuel mixture, thereby creating a significantly faster and larger flame kernel. The result is that more fuel is put to work durin
E3’s patented Diamond Fire Technology provides a cleaner burning combustion, which translates into fuel savings and reduced engine carbon deposits
The Spark Plugs are pre-gapped at the factory and cannot be adjusted.
Enhanced Heat Transfer: Three legs securing the Diamond FIRE electrode to the shell ensure excellent heat transfer and create more turbulence in the cylinder.
Wide Compatibility: The E3.74 spark plug is a 14mm, 1.000 reach plug with a taper seat, fitting a wide variety of late model applications, especially Ford vehicles.
Eco-Friendly Performance: Proven to reduce fuel consumption and improve hydrocarbon emissions, contributing to a cleaner environment.
Long-Term Efficiency: The Diamond FIRE side wire is designed for long-term use, maintaining increased power and reduced fuel consumption over time.

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$8.29

SINGLE PLATINUM TIP: Fine wire 0.6 millimeter platinum tip center electrode ensures improved durability and a consistently stable spark
PLATINUM ALLOY: G-Power platinum provides exceptional value with increased performance and longer service intervals than factory nickel plugs
TRAPEZOIDAL CUT GROUND ELECTRODE: Reduces quenching design produces improved ignitability and performance
SOLID COPPER CORE: 98% pure copper core offers superior heat dissipation, conductivity and ultra wide heat ranges
COLD-ROLLED THREADS: Prevents cross-threading and damage to cylinder heads
RECOMMENDED USAGE: Lower cost alternative to double precious metal spark plugs or as an upgrade to OE nickel alloy spark plugs
Enhanced Vehicle Performance: Experience faster starts and quicker acceleration compared to conventional nickel spark plugs, making it an excellent upgrade for vehicles originally using nickel alloy spark plugs.
Economical Upgrade: NGK G-Power Platinum spark plugs provide a cost-effective solution for upgrading your vehicle’s spark plugs without compromising on quality.
Compatibility and Versatility: Ideal for a wide range of vehicles, these spark plugs are a perfect fit for those looking to replace their nickel alloy spark plugs with a more durable and efficient option.

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$9.99

Our best spark plug! Autolite has over 100 years of engineering experience and has sold over 11 billion plugs. Designed and engineered in the USA, the Autolite Iridium XP spark plugs feature an iridium-enhanced 0.6mm finewire design and patented platinum sidewire technology to provide better overall durability and a more focused ignition for enhanced ignitability and performance. Features double Iridium-enhanced alloy technology center electrode for improved durability and wear resistance.

Product Features:

0.6 mm finewire design improves ignitability
Patented V-trimmed platinum sidewire technology resists wear
OE equivalent design is engineered for every engine
Designed for better overall durability with virtually no gap erosion
Double Iridium-Enhanced Alloy Technology Center Electrode: Offers improved durability and wear resistance for a longer-lasting spark plug.
Engineered in the USA: Designed with over 100 years of Autolite’s engineering experience for superior quality and performance.
Proven Track Record: Autolite has sold over 11 billion spark plugs, showcasing a legacy of reliability and trust.

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$10.99

Autolite Iridium Ultra Laser Finewire Spark Plugs are one of our brand’s most technologically advanced products. These spark plugs provide superior durability, more focused ignition with better overall ignitability for optimum performance. Autolite Spark Plugs are the best alternative to OE spark plugs, offering OE fit form and function supporting all foreign and domestic makes and models at a value price. Autolite provides the automotive aftermarket and original equipment manufacturers with the highest quality ignition products and is the leading supplier of spark plugs in the world.

Product Features:

Autolite Iridium Ultra is an engineered OE replacement iridium spark plug.
A laser-welded 0.5mm pure iridium finewire center electrode provides optimal fuel efficiency, acceleration and focused ignitability.
Nickel-plated shell to resist corrosion.
High-alumina ceramic insulator for increased strength.
Laser welded 0.5mm Iridium finewire center electrode.
Proprietary platinum sidewire technology.
Superior Durability: Autolite Iridium Ultra Laser Finewire Spark Plugs are designed to last longer, providing extended service life compared to standard spark plugs.
OE Fit and Function: Autolite Spark Plugs are the best alternative to original equipment (OE) spark plugs, offering perfect fit, form, and function for all foreign and domestic makes and models.
High-Quality Construction: As a leading supplier of spark plugs globally, Autolite ensures the highest quality ignition products for both the automotive aftermarket and original equipment manufacturers.
Value Pricing: Despite their advanced technology and superior performance, Autolite Iridium Ultra Laser Finewire Spark Plugs are available at a value price, making them an economical choice for vehicle maintenance.

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$6.49

With over 100 years of engineering expertise and more than 11 billion plugs sold, Autolite delivers exceptional quality. Designed and engineered in the USA, these spark plugs feature platinum-to-platinum firing, virtually eliminating gap erosion and reducing misfires. The OE design and full-platinum tips on both the center and side electrodes optimize engine performance for a longer life and improved fuel economy. The platinum ball welding process ensures a consistent point of contact for enhanced adhesion, making these spark plugs a reliable choice for superior durability.

Product Features:

Works to optimize engine performance for a longer life and improved fuel economy
OE design
Full-platinum tips; platinum on both the center and side electrodes to promote reduced gap wear
Platinum ball welding process provides a consistent point of contact for enhanced adhesion
Engineered in the USA: Designed and engineered in the USA, leveraging over 100 years of Autolite’s engineering expertise and quality assurance.
Proven Quality: With over 11 billion spark plugs sold, Autolite delivers exceptional quality and reliability, making it a trusted choice for automotive enthusiasts and professionals.

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$14.99

NGK Laser Iridium spark plugs offer the best combination of performance and longevity. Engineered specifically for OE applications, Laser Iridium spark plugs are tested to the highest standards to ensure quality and durability. Iridium tipped center electrode provides durability six times harder than platinum. NGKs high grade pure alumina ceramic and 98 percent pure copper core prevents the spark plug from overheating while providing reliable starts. Most Laser Iridium spark plugs feature a platinum pad on the ground electrode for even wear in distributorless ignition systems.

Product Features:

ACTUAL OE or EQUIVALENT DESIGN: OEM quality construction fine wire iridium alloy center electrode provides consistent performance
IRIDIUM ALLOY CENTER ELECTRODE: Iridium’s density (6x that of platinum) and extremely high melting point is perfect for modern high efficiency engines
PLATINUM TIP GROUND ELECTRODE: Unless OE specified, platinum protection at the ground electrode provides excellent ignitability and service life
SOLID COPPER CORE: 98% pure copper core offers superior heat dissipation, conductivity and ultra wide heat ranges
TRIVALENT METAL PLATING: Delivers superior anti-corrosion and anti-seizing properties, ensuring ease of installation and removal
RECOMMENDED USAGE: Best for vehicles with OE fine wire iridium alloy plugs
Superior Durability: The iridium-tipped center electrode is six times harder than platinum, ensuring long-lasting performance.
High-Quality Materials: Constructed with high-grade pure alumina ceramic and a 98% pure copper core to prevent overheating and ensure reliable starts.
OE Application Specific: Engineered specifically for Original Equipment (OE) applications, meeting the highest standards for quality and durability.
Fine Wire Tip Design: The fine wire tip design of the ILTR5E11 model ensures efficient and consistent spark delivery.

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$17.99

Durable to help transfer high voltage pulses without damage
Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE)
GM Genuine Parts are designed, engineered and tested to rigorous standards, and are backed by General Motors
GM Engineers design and validate OE parts specifically for your Chevrolet, Buick, GMC, or Cadillac vehicle
GM regularly updates production and service part designs to integrate new materials and technologies

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$17.47

Step up to the latest spark plug technology with ACDelco’s Professional Iridium Spark Plugs. Designed to last more than 100,000 miles in most applications, ACDelco Iridium Plugs are the ideal replacement for today’s top-performing vehicles.

Product Features:

Iridium is one of the hardest metals used in spark plugs today, which allows for smaller, more efficient electrode designs for improved cold starting and quicker acceleration.
Latest evolution in high-performance plug electrode material.
Improved cold-starting and acceleration characteristics.
Reduced ignition-system voltage demand saves wear and tear.
New-vehicle applications using iridium plugs continue to increase.

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$13.24

DENSO Iridium Power spark plugs represent a performance breakthrough. The laser-welded center electrode is only 0.4mm in diameter – the slimmest iridium electrode in the industry. The taper-cut side electrode complements the design, delivering reliable spark energy under the most gruelling pressures and temperatures. DENSO engineers used the power of this miraculous metal to produce an iridium center electrode that is only 0.4mm in diameter. With its superior thermal qualities, this whisker-fine electrode is capable of taking the most extreme heat and punishment. This breakthrough was matched to one of DENSO’s most famous innovations, the patented U-Groove ground electrode. The combination of these two features resulted in the Iridium Power® plug, one of the most advanced and innovative spark plugs on the market.

Product Features:

Tapered cut, U-Groove ground electrode
0.4mm iridium center electrode
360-degree laser welding assembly process
Required ignition voltage reduced
Unsurpassed center electrode durability
Available for many performance and power sports applications, including Corvette, Viper, and Harley-Davidson The Iridium Power plug delivers greater spark energy while demanding significantly less secondary required voltage from the ignition system.

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$9.99

Manufactured to the strictest OE performance, durability and emissions standards.

Product Features:

Latest OE technology with DENSO’s patented Iridium Alloy (90% Ir) and fine wire center electrode
Platinum ground electrode for extended life
DENSO Patented 360 degree laser welding process: Ensuring exceptional quality bond and structural strength with the Iridium Center Electrode
Sustained spark performance over 100,000 miles
Lasts up to three times as long as conventional plugs
Endures extreme temperatures greater than 4,000 degrees F associated with high-performance ignition and special fuel systems
Iridium Long Life

Most Popular 2021 GMC Sierra 3500 HD Ignition Coils and Boots

Customize your GMC with 5 Ignition Coils and Boots products like Ignition Coils, all priced under $137.99.

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$77.99

Carquest Premium ignition coils meet or exceed original equipment (OE) specifications and are developed by top OE/OES manufacturers to ensure superior performance. All of our Carquest Premium ignition coils are developed by IATF 16949 certified manufacturers for consistent durability and long-lasting performance. These ignition coils use high-quality components and will utilize optimized designs on applications where the OE ignition coil had frequent failures. We require stringent testing standards to ensure proper fit and performance for each application and stand behind our Carquest Premium ignition coils with an industry-leading warranty. Carquest Premium ignition coils are part of our Carquest Vehicle Solutions, which is a full line of engine management and electronics products that help control ignition, fuel delivery and emission systems. Carquest Vehicle Solutions are OE-quality parts designed, engineered and tested by world-class manufacturers to ensure a reliable and long-lasting repair.

Product Features:

Computer-Aided Design (CAD), laser scanning and 3D printing – utilizing Fused Deposition Modeling (FDM) and Stereolithography (SLA) – in the part design process ensures speed-to-market and a precise fit guaranteed.
100% pure copper precision-wound windings increase coil life and ensure reliability and maximum coil output when needed.
Highly conductive aluminum alloy secondary terminal guarantees secondary coil terminals will not oxidize (rust), will provide excellent conductivity, extended coil life and will not cause excessive stress on the primary control circuit.
100% thermo-shock and vibration tested to ensure superior performance in extreme conditions.
100% end-of-line tested to ensure confidence and product reliability, every time.

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$137.99

OE QUALITY: Vacuum-sealed premium epoxy resin and thermoplastic coil housings provide superior dielectric strength, voltage insulation and durability
OPTIMAL PERFORMANCE: Precision coil windings and laminations maximize outputs, custom NGK ASIC chipset optimizes efficiency, prevents component damage
EASE OF INSTALLATION: NGK Ignition Coils include ignition control module, premium high temperature coil boot, and jumper harnesses where required
THE NGK DIFFERENCE: Featuring superior materials and design enhancements.
EXTENSIVE TESTING: NGK ignition coils must pass extreme testing during manufacturing to ensure the highest quality and durability standards are met
PRODUCT ENGINEERING: Advanced flow and stress modeling systems preemptively identify and avoid common failure points found in OE and competitor coils

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$61.99

Computer-Aided Design (CAD), laser scanning and 3D printing – utilizing Fused Deposition Modeling (FDM) and Stereolithography (SLA) – in the part design process ensures speed-to-market and a precise fit guaranteed.
100% pure copper precision-wound windings increase coil life and ensure reliability and maximum coil output when needed.
Highly conductive aluminum alloy secondary terminal guarantees secondary coil terminals will not oxidize (rust), will provide excellent conductivity, extended coil life and will not cause excessive stress on the primary control circuit.
100% thermo-shock and vibration tested to ensure superior performance in extreme conditions.
100% end-of-line tested to ensure confidence and product reliability, every time.

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$91.99

Delphi OE technology ignition products are validated to match the vehicles system; OE quality replacement parts for the right fit , form and function; Delphi coils provide OE performance, durability and electromagnetic capacity level requirements.

Product Features:

Delphi coils provide OE performance, durability and electromagnetic capacity level requirements
Delphi ignition coils are designed to operate as part of an integral engine management system to insert power into spark plugs and ensure fast starts; consistent engine performance and optimized fuel efficiency
Delphi uses winding process techniques to control the length of wire between adjacent windings; that’s important since more length means greater voltage differences and can create more pressure that could break down the insulation and wire coating
We back our ignition coil design with proven materials, such as high quality wires and wire coating that resists the cracks, pin holes and imperfections that most often lead to failure issues

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$50.43

Ignition Coil

Top Picks for 2021 GMC Sierra 3500 HD Ignition Wires

Upgrade GMC Sierra 3500 HDs with top-quality Ignition Wires parts, including 3 OEM and aftermarket selections for your 2021 model.

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$73.47

OE-Equivalent.
OEM style connectors for easy Installation.
Resistant to high temperatures, corrosion and vibration.
Ignition noise suppressed.
Includes O.E. Type Connectors, Looms, Sensors and Harness Clips when required

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$89.99

Maintain your Chevrolet, Buick, GMC, or Cadillac vehicle with a Genuine GM Spark Plug Wire Set. This set consists of a group of wires encased in an insulating material, as well as connectors and insulating boots. They transfer high voltage pulses between the voltage source, the distributor, and your vehicle’s spark plug. Only Genuine GM Parts are tested to meet GM Original Equipment standards and are designed specifically to fit your vehicle.

Product Features:

Durable to help transfer high voltage pulses without damage
Designed, engineered, tested, and warranted for GM vehicles
Precise fit for ease of installation
For proper installation, locate your nearest GM dealer, independent service center, or body shop

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$65.22

Ignition Wire Set

In-Demand Ignition Switches for 2021 GMC Sierra 3500 HDs

Select from 2 premium Ignition Switches parts for your 2021 GMC Sierra 3500 HD, with prices ranging from $36.99 to $61.99.

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$61.99

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$36.99

Ignition Switch

Most Sold 2021 GMC Sierra 3500 HD Glow Plugs

Explore our best-selling GMC parts for the 2021 Sierra 3500 HD among 1 OEM and aftermarket options starting from $34.99.

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$34.99

Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE)
GM Genuine Parts are designed, engineered and tested to rigorous standards, and are backed by General Motors
GM Engineers design and validate OE parts specifically for your Chevrolet, Buick, GMC, or Cadillac vehicle
GM regularly updates production and service part designs to integrate new materials and technologies

Top-Rated Ignition and Tune-Up Products Brands For Your 2021 GMC Sierra 3500 HD

Shop for the best-rated brands offering Ignition and Tune-Up Products and other products for your 2021 GMC Sierra 3500 HDs. Below you’ll find some of our best rated Ignition and Tune-Up Products from NGK, Autolite, and E3, and more. Ignition and Tune-Up Products from these brands that fit a 2021 Sierra 3500 HD start at just $6.49 and are rated as high as 5 stars. OEM and aftermarket Ignition and Tune-Up Products don’t get more top quality, durable, and affordable than from the brands below.

Popular NGK 2021 GMC Sierra 3500 HD Ignition and Tune-Up Products

When it comes to maintaining or upgrading your 2021 GMC Sierra 3500 HD, using quality Ignition and Tune-Up Products is essential to ensure durability and a perfect fit. NGK ticks all of those boxes. We offer a wide selection of NGK Ignition and Tune-Up Products, specifically designed for the 2021 GMC Sierra 3500 HD. With over 5 NGK brand Ignition and Tune-Up Products in stock, you’re sure to find what you need. The prices for these top-notch parts start as low as $8.29, with an average price of just $37.45. Plus, with over 81 customer reviews and an average rating of 5 stars, you can trust that our NGK Ignition and Tune-Up Products will get the job done right. Choose Advance Auto Parts for reliability, quality, and expert-approved parts that keep your vehicle running strong.

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$14.99

This product is not rated

OE Series Laser Iridium Spark Plug: Fine Wire Tip Design, ILTR5E11

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$14.99

(1)

Ruthenium HX High Ignitability Spark Plug: DFE Tip Design, LTR5AHX

“really good spark plugs and provides the best for money option if your your vehicle to last a long time.”

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$137.99

This product is not rated

Ignition Coil: Meets or Exceeds Original Equipment Specifications, 1 Piece

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Popular Autolite 2021 GMC Sierra 3500 HD Ignition and Tune-Up Products

Autolite auto parts is one of the highest quality Ignition and Tune-Up Product brands in the market. Any 2021 GMC Sierra 3500 HD owner should feel confident when installing genuine Autolite parts in their vehicle. To ensure the best fit and performance for your 2021 Sierra 3500 HD, Advance Auto Parts carries a full inventory of 3 Autolite Ignition and Tune-Up Products. Plus you will be keeping your GMC in peak condition while saving money because prices on these Autolite Ignition and Tune-Up Products range from $6.49 to $10.99, plus, with more than 8 customer reviews and an impressive 5 stars average rating, you can be confident the Fram Ignition and Tune-Up Products below will deliver on both quality and value.

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$6.49

This product is not rated

Double Platinum Spark Plug: Platinum Firing, Superior Durability, Longer Life

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$10.99

This product is not rated

Iridium Ultra Finewire Spark Plug: Optimal Performance, Durability, Ignitability

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$9.99

(8)

Iridium XP Finewire Spark Plug: Improved Durability, More Focused Ignition

“Used these as replacements in my 2015 Silverado 5.3L. Plugs work well, engine runs smooth. Nice replacement.”

FAQs for 2021 GMC Sierra 3500 HD Ignition and Tune-Up Products

Which Ignition and Tune-Up Products are best-sellers for 2021 GMC Sierra 3500 HDs?

Out of 26 Ignition and Tune-Up Products that fit 2021 GMC Sierra 3500 HDs, the following parts are the top sellers:

Iridium XP Finewire Spark Plug: Improved Durability, More Focused Ignition (11015586) – $9.99
Iridium Ultra Finewire Spark Plug: Optimal Performance, Durability, Ignitability (12008177) – $10.99
Double Platinum Spark Plug: Platinum Firing, Superior Durability, Longer Life (11668250) – $6.49

What’s the price range for 2021 GMC Sierra 3500 HD Ignition and Tune-Up Products?

Ignition and Tune-Up Product prices for the 2021 GMC Sierra 3500 HD start at $6.49 and go up to $137.99 for the most premium parts.

What’s the average price of a Ignition and Tune-Up Product for a 2021 GMC Sierra 3500 HD?

The average price for Ignition and Tune-Up Products for the 2021 GMC Sierra 3500 HD is $40.54. Keep in mind the variety of part types within our Ignition and Tune-Up Product category so you are likely to find a wide range of prices across a variety of parts and components.

Does Advance Auto Parts sell Ignition and Tune-Up Products for other GMC Sierra 3500 HD model years?

Yes, we currently carry Ignition and Tune-Up Products for 18 model years of GMC Sierra 3500 HDs between 2007 and 2025. Ignition and Tune-Up Products are bought most frequently for the following model years: 2023, 2022, 2020, 2019, 2018, 2017, 2016, 2015, and 2014.

What are the cheapest Ignition and Tune-Up Products for my 2021 GMC Sierra 3500 HD?

The cheapest 2021 GMC Sierra 3500 HD Ignition and Tune-Up Products we carry in stock are:

Double Platinum Spark Plug: Platinum Firing, Superior Durability, Longer Life (11668250) – $6.49
G-Power Spark Plug: Single Platinum Tip Design, LTR5GP (20650265) – $8.29
DiamondFIRE Automotive Spark Plug: More Power, Saves Gas (11333297) – $8.49
Iridium XP Finewire Spark Plug: Improved Durability, More Focused Ignition (11015586) – $9.99
Iridium Long-Life Spark Plug: OE Performance, last 100K+ Miles, ZTJ16VR10 (50003011) – $9.99

What are the top-rated Ignition and Tune-Up Products that fit the 2021 GMC Sierra 3500 HD?

Out of 1,244 reviews by customers, our 2021 GMC Sierra 3500 HD Ignition and Tune-Up Products have an average customer rating of . These are some of the highest-rated Ignition and Tune-Up Product types for the 2021 GMC Sierra 3500 HD and their top-rated products:

Spark Plugs
- Ruthenium HX High Ignitability Spark Plug: DFE Tip Design, LTR5AHX (12069512) – $14.99
- Iridium IX Spark Plug: Single Iridium Fine Wire, LTR5IX-11 (11000198) – $10.99
- DiamondFIRE Automotive Spark Plug: More Power, Saves Gas (11333297) – $8.49

What types of Ignition and Tune-Up Products do you sell for my 2021 GMC Sierra 3500 HD?

As of 2/5/25, these are some of the most in-demand types of Ignition and Tune-Up Products for a 2021 GMC Sierra 3500 HD:

Can I get help with 2021 GMC Sierra 3500 HD Ignition and Tune-Up Product orders?

Contact our customer support team, by chat or phone, through the help desk page, where you can find instant answers about GMC Ignition and Tune-Up Products and more.

What is your return policy for GMC Sierra 3500 HD Ignition and Tune-Up Products?

Advance Auto Parts keeps returns simple. For new GMC Sierra 3500 HD Ignition and Tune-Up Products and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.

2021 GMC Sierra 3500 HD Ignition and Tune-Up Products

Autolite – Diesel Engine Glow Plug: High Intensity Concentrated Heat, Reliable Starts (Part No.1120)

GM Genuine Parts – Glow Plug (Part No.68G)

NGK – Metal Glow Plug: Advanced Quick Glow Type, Y1033AS (Part No.90046)

GM Genuine Parts – Diesel Glow Plug: Engineered for Optimal Cold Starts (Part No.9G)

GM Genuine Parts – Ignition Switch (Part No.D1485F)

Carquest Premium – Ignition Switch (Part No.CSA2665)

Carquest Premium – Ignition Switch (Part No.CSC5038)

Carquest Premium – Ignition Switch (Part No.CSA1116)

NGK – NGK Wire Set (Part No.51436)

Carquest Premium – Spark Plug Wire Set: 8 Wires, Increased performance, Designed for direct fit (Part No.35-8158)

Karlyn – Ignition Wire Set (Part No.F10202140926KAR)

Autopart International Inc – Ignition Wire Set (Part No.F10202047981API)

NGK – Ignition Coil: Meets or Exceeds Original Equipment Specifications, 1 Piece (Part No.48713)

MSD Ignition – Blaster LS Coils for 05-13 GM LS2/3/4/7/9 Engines (8-Pack) (Part No.82658)

NGK – Ignition Coil: Meets or Exceeds Original Equipment Specifications, 1 Piece (Part No.48933)

Carquest – Ignition Coil: Meets OE Specifications, 1 Count (Part No.26C1053)

ACDelco – Ignition Knock (Detonation) Sensor (Part No.213-1576)

Carquest Premium – Knock Sensor (Part No.EKC1007)

Encore Automotive – Genuine OE Ignition Knock (Detonation) Sensor (Part No.SKS-D20003)

Carquest Premium – Ignition Knock (Detonation) Sensor (Part No.SBA3656)

ACDelco – Spark Plug Wire Set (Part No.356F)

GM Genuine Parts – Spark Plug Wire (Part No.12716289)

NGK – Iridium IX Spark Plug: Single Iridium Fine Wire, LTR5IX-11 (Part No.4344)

DENSO – Iridium Long Life Spark Plug (Part No.F1000336990ND)

ACDelco – Rapidfire Spark Plug (Part No.6)

Motorcraft – Spark Plug (AGSF52C) (Part No.SP-442)

NGK – G-Power Spark Plug: Single Platinum Tip Design, LTR5GP (Part No.5019)

NGK – Iridium IX Spark Plug: Single Iridium Fine Wire, TR5IX (Part No.7397)

NGK – Ruthenium HX High Ignitability Spark Plug: DFE Tip Design, LTR5AHX (Part No.90220)

NGK – Iridium IX Spark Plug: Single Iridium Fine Wire, LTR5IX-11 (Part No.4344)

E3 – DiamondFIRE Automotive Spark Plug: More Power, Saves Gas (Part No.E3.74)

NGK – G-Power Spark Plug: Single Platinum Tip Design, LTR5GP (Part No.5019)

Autolite Iridium – Iridium XP Finewire Spark Plug: Improved Durability, More Focused Ignition (Part No.XP6043)

Autolite Iridium – Iridium Ultra Finewire Spark Plug: Optimal Performance, Durability, Ignitability (Part No.AI6043)

Autolite – Double Platinum Spark Plug: Platinum Firing, Superior Durability, Longer Life (Part No.APP6043)

NGK – OE Series Laser Iridium Spark Plug: Fine Wire Tip Design, ILTR5E11 (Part No.91418)

GM Genuine Parts – Spark Plug Wire (Part No.12716289)

ACDelco – Professional Iridium Spark Plug (Part No.F1000465395ACD)

DENSO – Iridium Power Spark Plug (Part No.F1000177171ND)

DENSO – Iridium Long-Life Spark Plug: OE Performance, last 100K+ Miles, ZTJ16VR10 (Part No.3539)

Carquest Premium – Ignition Coil: Meets or Exceeds Original Equipment Specifications, 1 Piece (Part No.EBA1147)

NGK – Ignition Coil: Meets or Exceeds Original Equipment Specifications, 1 Piece (Part No.48881)

Carquest Premium – Ignition Coil: Meets or Exceeds Original Equipment Specifications, 1 Piece (Part No.EBA1102)

Delphi – Ignition Coil (Part No.GN10165)

Autopart International Inc – Ignition Coil (Part No.F30001982223API)

Karlyn – Ignition Wire Set (Part No.F10202140926KAR)

GM Genuine Parts – Sparkplug Wire Kit (Part No.19431551)

Autopart International Inc – Ignition Wire Set (Part No.F10202047981API)

Carquest Premium – Ignition Switch (Part No.CSA2665)

Carquest Premium – Ignition Switch (Part No.CSC5038)

GM Genuine Parts – Glow Plug (Part No.68G)