2021 GMC Sierra 2500 HD Engine Parts

Essential Engine Parts for 2021 GMC Sierra 2500 HDs

Mahle – Camshaft Retainer (Part No.A4355425751MAH)

Camshaft Retainer

from

$35.08
Camshaft Retainer

NTK – Camshaft Position Sensor (Part No.EC0099)

Camshaft Position Sensor

from

$64.99
The Camshaft Position Sensor plays a vital role in your engine’s operation; to determine the exact position and speed of the camshaft(s) to the ECM. The ECM uses this information to determine fuel and spark timing as well as VVT operation. A failed sensor can result in a check engine light, hard starting or failure to start, increased vehicle emissions and engine misfire. NTK Camshaft Position Sensors are a premium quality product with outstanding support and leading innovation bred from our OE heritage.

Product Features:
  • THE NTK DIFFERENCE: Enhanced, robust circuit board traces and precision-wound coated-copper windings increase durability, longevity and performance
  • OE QUALITY: Designed to meet or exceed OE specifications, fit, form and function to ensure proper position and/or rotating speed of the camshaft
  • EXTENSIVE TESTING: 100 percent thermal shock and vibration tested for best in class performance and reliability in the most extreme conditions
  • PRODUCT ENGINEERING: Premium seals prevent leaks or corrosion, while optimized magnet size and strength ensures precise, consistent signal output
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Carquest Premium – Manifold Absolute Pressure Sensor (Part No.WTA1591)

Manifold Absolute Pressure Sensor

from

$36.99
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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Carquest Premium – New MAP SENSOR (Part No.ECE1033)

New MAP SENSOR

from

$63.99
The Premium CarQuest Vehicle Solutions line is designed for OE form, fit and function for both import and domestic vehicles. The A/C Pressure Relief Valve is used in the automotive air conditioning system to prevent unusual over-pressure that may cause damage to critical components within the system or to the system as a whole. By opening it’s valve when the system pressure exceeds the preset pressure levels and closing when the internal pressure decreases to the preset pressure levels, proper factory designated system pressures are maintained.

Product Features:
  • Made to OE spec to ensure a proper fit, form and function.
  • Sensors are engineered for precision performance, durability and a long service life.
  • All units are tested using advanced end-of-line testing equipment that pressurizes the A/C Pressure Relief Valve and checks functionality to ensure each A/C Pressure Relief Valve meets manufacturing specifications before packaging.
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Carquest Premium – Chain (Part No.3SRH-60)

Chain

from

$28.99
Advance Auto Parts is proud to carry this part with the best fitment and performance requirements for this application, from the highest quality timing component vendor.

Product Features:
  • The chain is heat treated steel for durability and prerun for accurate fit
  • Roller chain with 60 rollers and 0 timing marks
  • Meets or exceeds O.E.M. performance
  • Coated in rust preventative
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GM Genuine Parts – Gen III/IV Lifter Guide (Part No.12595365)

Gen III/IV Lifter Guide

from

$14.99
GM Genuine Parts Engine Valve Lifter Guide 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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Felpro – Engine Cylinder Head Bolt Set (Part No.ES 72344)

Engine Cylinder Head Bolt Set

from

$91.99
Fel-Pro gaskets offer 100% vehicle sealing with application-specific materials to give you sealing solutions with the performance and durability professionals trust

Product Features:
  • Meets or exceeds all original equipment specifications
  • Application specific design to ensure a perfect fit
  • Avoid risk associated with re-use of T-T-Y (torque to yield) head bolts
  • Validated for fit, form and function
  • Unsurpassed quality you can trust
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Felpro – CYLINDER HEAD BOLT SET (Part No.ES 72390)

CYLINDER HEAD BOLT SET

from

$36.99
Fel-Pro gaskets offer 100% vehicle sealing with application-specific materials to give you sealing solutions with the performance and durability professionals trust

Product Features:
  • Meets or exceeds all original equipment specifications
  • Application specific design to ensure a perfect fit
  • Avoid risk associated with re-use of T-T-Y (torque to yield) head bolts
  • Validated for fit, form and function
  • Unsurpassed quality you can trust
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Carquest Premium – Crankshaft Sensor (Part No.CSC1065)

Crankshaft Sensor

from

$51.99
A leader in vehicle electronic solutions, each premium product meets or exceeds OE specifications in appearance, fit, and function, ensuring easy installation and excellent performance. The product has been tested under extreme environments.

Product Features:
  • Reliable circuit board and product structure design, 3D proofing, and field test verification to ensure correct signal output at all speeds.
  • Manufactured in an anti-static environment to ensure reliability and stability.
  • Extreme temperature and salt spray tests simulate real-world vehicle conditions to ensure durability and reliability.
  • Providing this premium product line, we meet the service professionals needs with the highest quality product every time the part comes out of the box.
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Carquest Premium – Engine Crankshaft Position Sensor (Part No.CSA1514)

Engine Crankshaft Position Sensor

from

$63.99
A leader in vehicle electronic solutions, each premium product meets or exceeds OE specifications in appearance, fit, and function, ensuring easy installation and excellent performance. The product has been tested under extreme environments, including thermal shock and vibration, with unparalleled reliability, durability, and accuracy.

Product Features:
  • Products are produced in ISO 14001 and IATF 16949 certified facilities to ensure the highest quality and consistency throughout the production process.
  • Reliable circuit board and product structure design, 3D proofing, and field test verification to ensure correct signal output at all speeds.
  • Manufactured in an anti-static environment to ensure reliability and stability.
  • Extreme temperature and salt spray tests simulate real-world vehicle conditions to ensure durability and reliability.
  • Providing this premium product line, we meet the service professionals needs with the highest quality product every time the part comes out of the box.
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National – Multi Purpose Seal (Part No.100470)

Multi Purpose Seal

from

$28.99
National® has built a reputation as one of the most respected names in the industry. We have offered premium sealing solutions for more than 75 years. Our design team keeps pace with the industry and provides advanced solutions for today’s vehicles.

Product Features:
  • Design type: spring loaded; multi-lip
  • Temperature range: -100°F to 450°F / -73°C to 232°
  • Excellent dry running capabilities
  • Low coefficient of friction
  • Delivers quality and reliable performance for every type of repair
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Elring – Crankshaft Seal (Part No.A8060177425ELR)

Crankshaft Seal

from

$42.11
Crankshaft Seal

ACDelco – Valve Cover Gasket (Part No.A8030580015ACD)

Valve Cover Gasket

from

$8.35
Valve Cover Gasket

ACDelco – GM Original Equipment Valve Cover Gasket (Part No.A8030225314ACD)

GM Original Equipment Valve Cover Gasket

from

$91.49
The ACDelco GM Original Equipment Valve Cover Gasket is a GM-recommended replacement component that provides the same performance, durability, and service life as your factory original equipment.

Product Features:
  • 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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Victor Reinz – Fuel Injection Plenum Gasket (Part No.71-14114-00)

Fuel Injection Plenum Gasket

from

$4.49
With Victor Reinz gaskets, you can be sure you are getting sealing solutions that deliver OE quality gasket technology and engineering. That is because Victor Reinz is an original equipment supplier and the trusted choice of manufacturers the world over, offering broad coverage for foreign and domestic cars and trucks. In Victor Reinz gasket sets, you get the right combination of components needed for fast, long-lasting repairs.

Product Features:
  • Choosing Victor Reinz assures getting OE quality parts in gaskets sets that have the coverage, contents, packaging and electronic cataloging to best meet the needs of the aftermarket.
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Felpro – UPPER INTAKE MANIFOLD GASKET/ PLENUM GASKET (Part No.73009)

UPPER INTAKE MANIFOLD GASKET/ PLENUM GASKET

from

$9.99
Fel-Pro gaskets offer 100% vehicle sealing with application-specific materials to give you sealing solutions with the performance and durability professionals trust

Product Features:
  • Meets or exceeds all original equipment specifications
  • Application specific design to ensure a perfect fit
  • Engineered and manufactured specifically for the repair environment
  • Unsurpassed quality you can trust
  • Each Fel-Pro gasket, no matter how small, is engineered to exacting standards with proprietary design, engineering and manufacturing processes
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Cloyes Gear – Engine Timing Crankshaft Sprocket (Part No.S827)

Engine Timing Crankshaft Sprocket

from

$25.99
Along with the timing chain, tensioners, and guides, sprockets are an integral component within the timing system. Timing gears and sprockets are available as part of complete timing kits as well as for individual purchase and installation

Product Features:
  • Featuring precision-tooled or machined tooth form and precision-machined bore for true fit, timing chain sprockets offer reliability and dependability for engine rebuilds and typical replacement jobs
  • Recommended that the chain tensioner(s), sprocket(s), and guide(s) also be replaced when the chain is replaced, as these components play a vital role in system stability and accurate timing
  • CAD designed and manufactured using premium materials
  • Each part is extensively tested and measured for function, fitment, and durability to ensure optimal performance
  • Refer to our online catalog for detailed application-specific information
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Cloyes Gear – Engine Timing Crankshaft Sprocket (Part No.S837)

Engine Timing Crankshaft Sprocket

from

$32.99
Along with the timing chain, tensioners, and guides, sprockets are an integral component within the timing system. Timing gears and sprockets are available as part of complete timing kits as well as for individual purchase and installation

Product Features:
  • Featuring precision-tooled or machined tooth form and precision-machined bore for true fit, timing chain sprockets offer reliability and dependability for engine rebuilds and typical replacement jobs
  • Recommended that the chain tensioner(s), sprocket(s), and guide(s) also be replaced when the chain is replaced, as these components play a vital role in system stability and accurate timing
  • CAD designed and manufactured using premium materials
  • Each part is extensively tested and measured for function, fitment, and durability to ensure optimal performance
  • Refer to our online catalog for detailed application-specific information
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ACDelco – GM Original Equipment Fuel Pump Tank Seal (Part No.E3004289666ACD)

GM Original Equipment Fuel Pump Tank Seal

from

$17.61
The ACDelco GM Original Equipment Fuel Pump Tank Seal is a GM-recommended replacement component that provides the same performance, durability, and service life as your factory original equipment.

Product Features:
  • 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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GM Genuine Parts – Oil Pan Gasket (Part No.12612350)

Oil Pan Gasket

from

$64.99
GM Genuine Parts Engine Oil Pan Gaskets 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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Felpro – Lower Oil Pan Gasket Set: High-Temperature Rubber-Coated Fiber, 1 Piece Set (Part No.OS 30838)

Lower Oil Pan Gasket Set: High-Temperature Rubber-Coated Fiber, 1 Piece Set

from

$18.99
Fel-Pro gaskets offer 100% vehicle sealing with application-specific materials to give you sealing solutions with the performance and durability professionals trust

Product Features:
  • DESIGNED FOR IMPERFECT SEALING SURFACES — Engineered and manufactured specifically for the repair environment to help seal imperfect sealing surfaces
  • ENGINEERED TO PERFORM — Proprietary cork-rubber formulation
  • SUPERIOR SEAL — Highly conformable to accommodate for the imperfect sealing surfaces
  • EVERY PART FOR THE REPAIR — Fel-Pro gasket sets include every part needed for the repair unless otherwise noted
  • REAL-WORLD TESTED — Parts are tested on-vehicle and validated to ensure optimal performance on the road
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ACDelco – Engine Oil Level Sensor (Part No.D8055)

Engine Oil Level Sensor

from

$39.99
An ACDelco Professional, premium aftermarket Engine Oil Level Sensor is a high quality replacement for many vehicles on the road today. It measures the oil level in your vehicle’s oil pan and will send warnings to the information center or dash panel if oil levels reach a level that is too low, as determined by General Motors engineers. This premium aftermarket replacement engine oil level sensor is manufactured to meet your expectations for fit, form, and function.

Product Features:
  • Professional, premium aftermarket replacement
  • Provides the performance and dependability you expect from ACDelco
  • Manufactured to meet expectations for fit, form, and function
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ACDelco – Professional Engine Oil Level Sensor (Part No.A6080575601ACD)

Professional Engine Oil Level Sensor

from

$51.01
The ACDelco Professional, premium aftermarket Engine Oil Level Sensor is the ideal high quality replacement for your GM vehicle. It measures the oil level in your vehicle’s oil pan and will send warnings to the information center or dash panel if oil levels reach a level that is too low, as determined by General Motors engineers. This premium aftermarket replacement engine oil level sensor is manufactured to meet or exceed your expectations for fit, form, and function.

Product Features:
  • Works with vehicle electronics to help optimize vehicle capabilities
  • Array of switches, including: door lock, turn signal, ignition, trunk, and windshield wiper switches for most vehicles on the road today
  • Professional, premium aftermarket replacement
  • Manufactured to meet expectations for fit, form, and function to provide the performance and dependability you expect from ACDelco
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GM Genuine Parts – Oil Pan Seal (Part No.12621086)

Oil Pan Seal

from

$13.99
GM Genuine Parts Engine Oil Pan Seals 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
See More

ACDelco – GM Original Equipment Engine Oil Pan Gasket (Part No.A6130659422ACD)

GM Original Equipment Engine Oil Pan Gasket

from

$19.12
ACDelco GM Original Equipment Engine Oil Pan Gasket is a GM-recommended replacement component that provides the same performance, durability, and service life as your factory original equipment.

Product Features:
  • 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
See More

ACDelco – Crank Seal Cover Gas (Part No.A2161579544ACD)

Crank Seal Cover Gas

from

$12.11
Crank Seal Cover Gas

Upgrade your 2021 GMC Sierra 2500 HD with Top-Quality Engine Parts

When it comes to maintaining or upgrading your 2021 GMC Sierra 2500 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, Engine Parts are key to keeping your Sierra 2500 HD functioning at its best. At Advance Auto Parts, we offer a wide selection of 29 Engine Parts for the 2021 GMC Sierra 2500 HD, designed to meet your needs without breaking the bank. From Valve Cover and Cylinder Head replacements to Engine Gaskets and Seals 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 Engine Parts for any vehicle can be a hassle, especially if you’re on a budget. But with Advance Auto Parts, you can find high-quality Engine Parts for your 2021 GMC Sierra 2500 HD at great prices. Our Engine Parts inventory for this model ranges from just $4.68 to $81.50, with an average price of $31.23. Our 29 Engine Parts in stock come from 8 trusted brands, so you’re sure to find the right part for your 2021 GMC Sierra 2500 HD without overspending.

Explore Related Parts and More

While you’re here, don’t forget to check out other essential categories that go hand in hand with Engine Part upgrades. Explore related part types like Batteries and Chargers, Oil and Lubricants and more to make sure your 2021 GMC Sierra 2500 HD is always ready to roll. We’re committed to providing you with everything you need to keep your Sierra 2500 HD in top shape, all in one place. Start shopping confidently below for your 2021 GMC Sierra 2500 HD!

Best-Selling Valve Cover and Cylinder Heads for 2021 GMC Sierra 2500 HDs

Enhance the driving experience in your GMC with 2 quality Valve Cover and Cylinder Head components, starting at $14.99.

GM Genuine Parts – Gen III/IV Lifter Guide (Part No.12595365)

Gen III/IV Lifter Guide

from

$14.99
GM Genuine Parts Engine Valve Lifter Guide 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
See More

Felpro – Engine Cylinder Head Bolt Set (Part No.ES 73121)

Engine Cylinder Head Bolt Set

from

$51.99
Fel-Pro gaskets offer 100% vehicle sealing with application-specific materials to give you sealing solutions with the performance and durability professionals trust

Product Features:
  • Meets or exceeds all original equipment specifications
  • Application specific design to ensure a perfect fit
  • Avoid risk associated with re-use of T-T-Y (torque to yield) head bolts
  • Validated for fit, form and function
  • Unsurpassed quality you can trust
See More

Most Popular 2021 GMC Sierra 2500 HD Engine Gaskets and Seals

Customize your GMC with 7 Engine Gaskets and Seals products like Valve Cover Gaskets, Oil Pan Gaskets, and Plenum Gasket Sets, all priced under $21.49.

ACDelco – Intake Manifold Gask (Part No.A8040580030ACD)

Intake Manifold Gask

from

$4.68
Intake Manifold Gask

Felpro – Engine Valve Cover Gasket Set (Part No.VS 50907 R)

Engine Valve Cover Gasket Set

from

$21.49
Fel-Pro gaskets offer 100% vehicle sealing with application-specific materials to give you sealing solutions with the performance and durability professionals trust

Product Features:
  • DESIGNED FOR IMPERFECT SEALING SURFACES — Engineered and manufactured specifically for the repair environment to help seal imperfect sealing surfaces
  • SUPERIOR SEAL — Manufactured with rubber compounds to help ensure a consistent and long-life seal
  • PRECISE DESIGN — Engineered to work with the embossed cover and pan flanges
  • PREVENTS OVERTIGHTENING — Features compression limiters incorporated into the design to help eliminate overtightening (application specific)
  • OE-STYLE REPLACEMENT GASKET — Engineered for OE-style molded rubber gasket replacement
  • EVERY PART FOR THE REPAIR — Fel-Pro gasket sets include every part needed for the repair unless otherwise noted
  • EVERY PART FOR THE REPAIR — Fel-Pro gasket sets include every part needed for the repair unless otherwise noted
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ACDelco – Valve Cover Gasket (Part No.A8030580015ACD)

Valve Cover Gasket

from

$8.35
Valve Cover Gasket

ACDelco – Oil Pan Gasket (Part No.A6130756311ACD)

Oil Pan Gasket

from

$9.94
Oil Pan Gasket

ACDelco – GM Original Equipment Fuel Pump Tank Seal (Part No.E3004289666ACD)

GM Original Equipment Fuel Pump Tank Seal

from

$17.61
The ACDelco GM Original Equipment Fuel Pump Tank Seal is a GM-recommended replacement component that provides the same performance, durability, and service life as your factory original equipment.

Product Features:
  • 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
See More

ACDelco – Crank Seal Cover Gas (Part No.A2161579544ACD)

Crank Seal Cover Gas

from

$12.11
Crank Seal Cover Gas

GM Genuine Parts – Oil Pan Gasket (Part No.12666993)

Oil Pan Gasket

from

$5.49
GM Genuine Parts Engine Oil Pan Gaskets 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
See More

Top Picks for 2021 GMC Sierra 2500 HD Camshafts

Upgrade GMC Sierra 2500 HDs with top-quality Camshafts parts, including 5 OEM and aftermarket selections for your 2021 model.

ACDelco – Engine Camshaft Position Sensor (Part No.12636947)

Engine Camshaft Position Sensor

from

$29.99
ACDelco GM Original Equipment Engine Camshaft Position Sensors monitor the rotational position of the camshaft(s), and are GM-recommended replacements for your vehicle’s original components. They provide a signal to the engine control module which compares the camshaft position with the crankshaft position to determine ignition and fuel injection timing. These original equipment engine camshaft position sensors have been manufactured to fit your GM vehicle, providing the same performance, durability, and service life you expect from General Motors.

Product Features:
  • Helps keep engine timing and fuel injection running in sync
  • Helps provide proper alignment, positioning, and spacing for easy installation
  • Synchronizes engine valves and pistons for excellent engine performance
  • 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
See More

Mahle – Camshaft Retainer (Part No.A4355425751MAH)

Camshaft Retainer

from

$35.08
Camshaft Retainer

ACDelco – Engine Camshaft Position Sensor (Part No.12623093)

Engine Camshaft Position Sensor

from

$29.99
ACDelco GM Original Equipment Engine Camshaft Position Sensors monitor the rotational position of the camshaft(s), and are GM-recommended replacements for your vehicle’s original components. They provide a signal to the engine control module which compares the camshaft position with the crankshaft position to determine ignition and fuel injection timing. These original equipment engine camshaft position sensors have been manufactured to fit your GM vehicle, providing the same performance, durability, and service life you expect from General Motors.

Product Features:
  • Helps keep engine timing and fuel injection running in sync
  • Helps provide proper alignment, positioning, and spacing for easy installation
  • Synchronizes engine valves and pistons for excellent engine performance
  • 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
See More

Carquest Premium – Engine Camshaft Position Sensor (Part No.CSA4435)

Engine Camshaft Position Sensor

from

$22.49
Engine Camshaft Position Sensor

Dorman – Magnetic Camshaft Position Sensor (Part No.962-277)

Magnetic Camshaft Position Sensor

from

$21.99
This engine camshaft position sensor is designed to match the fit and function of an original sensor to help ensure the engine control unit receives proper inputs when an original sensor has failed from heat or internal component damage.

Product Features:
  • Direct replacement – this engine camshaft position sensor is designed to match the fit and function of an original sensor on specified vehicles
  • Ideal solution – engineered to help ensure the engine control unit receives proper inputs when an original sensor has failed from heat or internal component damage
  • Durable construction – designed and manufactured to strict specifications for reliable performance
  • Trustworthy quality – backed by a team of product experts in the United States and more than a century of automotive experience
See More

In-Demand Engine Switches, Sensors and Relays for 2021 GMC Sierra 2500 HDs

Select from 5 premium Engine Switches, Sensors and Relays parts for your 2021 GMC Sierra 2500 HD, with prices ranging from $28.99 to $43.99.

ACDelco – Engine Crankshaft Position Sensor (Part No.12669636)

Engine Crankshaft Position Sensor

from

$39.99
ACDelco GM Original Equipment Engine Crankshaft Position Sensors monitor the position and rotational speed of the crankshaft, and are GM-recommended replacements for your vehicle’s original components. The signal from the crankshaft position sensor is used by the engine control module to determine fuel injection and ignition timing. These original equipment engine crankshaft position sensors have been manufactured to fit your GM vehicle, providing the same performance, durability, and service life you expect from General Motors.

Product Features:
  • This part requires programming and/or special setup procedures. GM Service Information describes the procedures and special tools needed to ensure proper operation in the vehicle
  • Helps keep engine timing and fuel injection running in sync
  • Helps provide proper alignment, positioning, and spacing for easy installation
  • Synchronizes engine valves and pistons for excellent engine performance
  • 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
See More

Carquest Premium – Engine Crankshaft Position Sensor (Part No.CSA1928)

Engine Crankshaft Position Sensor

from

$34.99
A leader in vehicle electronic solutions, each premium product meets or exceeds OE specifications in appearance, fit, and function, ensuring easy installation and excellent performance. The product has been tested under extreme environments, including thermal shock and vibration, with unparalleled reliability, durability, and accuracy.

Product Features:
  • Products are produced in ISO 14001 and IATF 16949 certified facilities to ensure the highest quality and consistency throughout the production process.
  • Reliable circuit board and product structure design, 3D proofing, and field test verification to ensure correct signal output at all speeds.
  • Manufactured in an anti-static environment to ensure reliability and stability.
  • Extreme temperature and salt spray tests simulate real-world vehicle conditions to ensure durability and reliability.
  • Providing this premium product line, we meet the service professionals needs with the highest quality product every time the part comes out of the box.
See More

Carquest Premium – Engine Oil Level Sensor FFC1241 (Part No.FFC1241)

Engine Oil Level Sensor FFC1241

from

$43.99
The engine lubrication system is critical to engine operation and long life. On some vehicle applications, the engine control module monitors the engine oil level to ensure lubrication is not lost.

Product Features:
  • Product constructed to meet all design and operating characteristics as intended by the vehicle manufacturer.
  • 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.
  • Where applicable, robust circuit board design increases durability due to heat, shock, and random electro-magnetic pulses (EMP) and power spikes.
  • Tin plated lead frame prevents corrosion and ensures a reliable terminal connection under adverse ambient conditions.
  • 100% thermo-shock and vibration tested to ensure superior performance in extreme conditions.
  • 100% end-of-line tested to ensure accurate signal output providing product reliability, every time.
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ACDelco – Camshaft Position Se (Part No.A4015458532ACD)

Camshaft Position Se

from

$37.00
Camshaft Position Se

Dorman – Magnetic Crankshaft Position Sensor (Part No.962-602)

Magnetic Crankshaft Position Sensor

from

$28.99
This engine crankshaft position sensor is designed to match the fit and function of an original sensor to help ensure the engine control unit receives proper inputs when an original sensor has failed from heat or internal component damage.

Product Features:
  • Direct replacement – this engine crankshaft position sensor is designed to match the fit and function of an original sensor on specified vehicles
  • Ideal solution – engineered to help ensure the engine control unit receives proper inputs when an original sensor has failed from heat or internal component damage
  • Durable construction – designed and manufactured to strict specifications for reliable performance
  • Trustworthy quality – backed by a team of product experts in the United States and more than a century of automotive experience
See More

Most Sold 2021 GMC Sierra 2500 HD Engine Timing Parts

Explore our best-selling GMC parts for the 2021 Sierra 2500 HD among 2 OEM and aftermarket options starting from $39.99.

Cloyes Gear – Engine Timing Chain (Part No.9-4205)

Engine Timing Chain

from

$39.99
A timing chain synchronizes the rotation of the crankshaft and camshaft(s) ensuring proper timing and allows the engine’s valves to open and close during each cylinder’s firing. Available in kits or as a stand-alone product, our chains are pre-stressed and heat-treated for increased durability. Our chains are engineered and manufactured with precision pitch control for proper chain-to-sprocket tooth fitment

Product Features:
  • Recommended that the chain tensioner(s), sprocket(s), and guide(s) also be replaced when the chain is replaced, as these components play a vital role in system stability and accurate timing
  • Each part is extensively tested and measured for function, fitment, and durability to ensure optimal performance
  • Engineered and manufactured with precision pitch control for proper chain-to-sprocket tooth fitment
  • CAD designed and manufactured using premium materials
  • Refer to our online catalog for detailed application-specific information
  • Pre-Stressed And Heat-Treated For Increased Durability. Precision Cut Plates And Rollers With Smooth Finish. Precision Pitch Control For Proper Chain To Sprocket Tooth Fit.
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Cloyes Gear – Engine Timing Crankshaft Sprocket (Part No.S1111)

Engine Timing Crankshaft Sprocket

from

$68.99
Along with the timing chain, tensioners, and guides, sprockets are an integral component within the timing system. Timing gears and sprockets are available as part of complete timing kits as well as for individual purchase and installation.

Product Features:
  • Featuring precision-tooled or machined tooth form and precision-machined bore for true fit, timing chain sprockets offer reliability and dependability for engine rebuilds and typical replacement jobs
  • Recommended that the chain tensioner(s), sprocket(s), and guide(s) also be replaced when the chain is replaced, as these components play a vital role in system stability and accurate timing
  • CAD designed and manufactured using premium materials
  • Each part is extensively tested and measured for function, fitment, and durability to ensure optimal performance
  • Refer to our online catalog for detailed application-specific information
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FAQs for 2021 GMC Sierra 2500 HD Engine Parts

Which Engine Parts are best-sellers for 2021 GMC Sierra 2500 HDs?

Out of 29 Engine Parts that fit 2021 GMC Sierra 2500 HDs, the following parts are the top sellers:

What’s the price range for 2021 GMC Sierra 2500 HD Engine Parts?

Engine Part prices for the 2021 GMC Sierra 2500 HD start at $4.68 and go up to $81.50 for the most premium parts.

What’s the average price of a Engine Part for a 2021 GMC Sierra 2500 HD?

The average price for Engine Parts for the 2021 GMC Sierra 2500 HD is $31.23. Keep in mind the variety of part types within our Engine Part category so you are likely to find a wide range of prices across a variety of parts and components.

Does Advance Auto Parts sell Engine Parts for other GMC Sierra 2500 HD model years?

Yes, we currently carry Engine Parts for 24 model years of GMC Sierra 2500 HDs between 2001 and 2025. Engine Parts are bought most frequently for the following model years: 2023, 2022, 2020, 2019, 2018, 2017, 2016, 2015, and 2014.

What are the cheapest Engine Parts for my 2021 GMC Sierra 2500 HD?

The cheapest 2021 GMC Sierra 2500 HD Engine Parts we carry in stock are:

What types of Engine Parts do you sell for my 2021 GMC Sierra 2500 HD?

Can I get help with 2021 GMC Sierra 2500 HD Engine Part orders?

Contact our customer support team, by chat or phone, through the help desk page, where you can find instant answers about GMC Engine Parts and more.

What is your return policy for GMC Sierra 2500 HD Engine Parts?

Advance Auto Parts keeps returns simple. For new GMC Sierra 2500 HD Engine Parts and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.