2018 GMC Sierra 1500 Alternators and Starters

Name: Ignition Lock Cylind
Brand: ACDelco
SKU: M5040290059ACD
Price: 103.52 USD

Below you will find various in-demand GMC Alternators and Starters, components and accessories for your 2018 Sierra 1500. Advance Auto Parts has popular Sierra 1500 parts like Ignition Lock Parts, Alternator Pulley Parts, Alternator Parts and more. You’ll also find aftermarket and OEM Alternators and Starters for other Sierra 1500 model years including 2013, 2014, 2015, 2016, 2017, 2019, 2020, 2021, 2022 and more. Select a category of 2018 GMC Sierra 1500 Alternators and Starters below and start saving instantly.

Popular 2018 GMC Sierra 1500 Alternators and Starters Categories

Alternators

Starters

Ignition Lock Cylinders

Alternator Decoupler Pulleys

Starter Bolts

Alternator Pigtails

Essential Alternators and Starters for 2018 GMC Sierra 1500s

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$103.52

Ignition Lock Cylind

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$56.05

LockSmart® is a specialized aftermarket lock brand featuring door, trunk, and ignition lock cylinders. LockSmart® provides OE fit, form, and function locks across domestic and import applications for both late and older model vehicles.

Product Features:

Direct-fit OE replacement ignition lock cylinder ensures effective start of engine energy supply
Constructed from high-grade materials to ensure durability and longevity
Undergoes 100% testing for proper fit, form, and function
As a global manufacturer, we maintain complete quality control throughout the manufacturing process

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$50.99

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.

Product Features:

Computer-Aided Design (CAD), laser scanning and 3D printing ┐ utilizing Fused Deposition Modeling (FDM) and Stereolithography (SLA) ┐ in the connector terminal design process ensures speed-to-market and a precise connector fit guaranteed.
Product constructed to meet all design and operating characteristics as intended by the vehicle manufacturer.
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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$113.32

Dorman Ignition Lock Cylinders are part of the Ignition Lock Assembly and failure is due to wear and tear from continual key rotation. The purpose of the Ignition Lock Cylinder is to provide a level of security that requires a coded metal Ignition Key in order for the vehicle Ignition Switch to be operated and energized, thereby allowing the vehicle to be started and operated.

Product Features:

Direct replacement and operation
Includes easy to follow instructions with no need for any specialized tools or equipment
Tumblers are included for optional rekeying, eliminating the need to carry 2 keys and reprogram a new anti-theft key

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$18.29

Premium quality materials for longer service life
Sealed connections (where applicable) to prevent environmental corrosion and performance issues
Global coverage for import and/or domestic applications
OE specified wire gauge to ensure a reliable electrical connection
Designed to meet or exceed OE specifications in form, fit and function

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$37.99

Premium quality materials for longer service life
Sealed connections (where applicable) to prevent environmental corrosion and performance issues
Global coverage for import and/or domestic applications
OE specified wire gauge to ensure a reliable electrical connection
Designed to meet or exceed OE specifications in form, fit and function

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$15.79

Premium quality materials for longer service life
Sealed connections (where applicable) to prevent environmental corrosion and performance issues
Global coverage for import and/or domestic applications
OE specified wire gauge to ensure a reliable electrical connection
Designed to meet or exceed OE specifications in form, fit and function

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$42.99

This alternator connector is designed to match the appearance and function of the original hardware on specified applications. Made of quality materials, it is engineered for reliable performance and durability.

Product Features:

Direct replacement – this alternator connector matches the appearance and function of the factory hardware on specified applications.
Ideal solution – this connector is a reliable replacement for an original part that is missing or has failed due to fatigue
Durable construction – this part is made from quality materials to ensure reliable performance and long service life
Trustworthy quality – backed by team of product experts in the United States and more than a century of automotive experience

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$74.99

Litens Automotive is the original equipment (O.E.) supplier for this application. This replacement alternator pulley is also designed and produced by Litens and is exact in all form, fit, and performance characteristics as the original equipment part. Decoupling pulleys are engine specific and should never be interchanged with other types of pulley technology. The Litens OAD? type pulley is designed to free-wheel in one direction and, with an internal spring and damping device, softly engage in the opposite direction. The OAD? is designed as a sacrificial part of the front-end accessory drive system, protecting other belt driven component as well as the alternator. The correct decoupler pulley ensures smooth, quiet performance as well as increasing vehicle gas mileage. Litens is the world’s largest supplier of original equipment (O.E.) power transmission products. At Litens, we design systems that are more efficient, resulting in tangible fuel economy/emissions benefits. Litens holds over 2000 patents and continues to respond to the ever-changing automotive industry by investing heavily in new technology, facilities, and people. 90% of our line is made of products coming from the OE manufacturer, which makes the Litens Tensioning Products portfolio the purest OE tensioning line in the North American aftermarket.

Product Features:

Designed and engineered by Litens Automotive. The inventor of the OAD? (Overrunning Alternator Decoupler)
Patented Original Equipment Design
Protects the alternator and other front-end accessory drive components
17mm HexTool included in kit to assist in removal and installation
New cap included with the OAD (Always ensure the cap is installed after installation)
Installation instructions included.

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$61.99

Litens Automotive is the original equipment (O.E.) supplier for this application. This replacement alternator pulley is also designed and produced by Litens and is exact in all form, fit, and performance characteristics as the original equipment part. Decoupling pulleys are engine specific and should never be interchanged with other types of pulley technology. The Litens OAD? type pulley is designed to free-wheel in one direction and, with an internal spring and damping device, softly engage in the opposite direction. The OAD? is designed as a sacrificial part of the front-end accessory drive system, protecting other belt driven component as well as the alternator. The correct decoupler pulley ensures smooth, quiet performance as well as increasing vehicle gas mileage. Patented Original Equipment Design. Litens is the world’s largest supplier of original equipment (O.E.) power transmission products. At Litens, we design systems that are more efficient, resulting in tangible fuel economy/emissions benefits. Litens holds over 2000 patents and continues to respond to the ever-changing automotive industry by investing heavily in new technology, facilities, and people. 90% of our line is made of products coming from the OE manufacturer, which makes the Litens Tensioning Products portfolio the purest OE tensioning line in the North American aftermarket.

Product Features:

Designed and engineered by Litens Automotive. The inventor of the OAD? (Overrunning Alternator Decoupler)
Protects the alternator and other front-end accessory drive components
17mm Hex tool included in kit to assist in removal and installation
New cap included with the OAD (Always ensure the cap is installed after installation)
Installation instructions included

from

$128.99

Litens Automotive is the original equipment supplier for the 2014-2018 Chevrolet Corvette, Silverado,Tahoe, Suburban / GMC Yukon, Sierra with 4.3/5.3/6.2L . This replacement pulley is also designed and produced by Litens and is exact in all form, fit, and performance characteristics as the original equipment part (with the exception of not having the car manufacturer’s logo or part number applied to the part). Decoupling pulleys are engine specific and should never be interchanged with other types of pulley technology. The Litens OAD type pulley is designed to free-wheel in one direction and, with an internal spring and damping device, softly engage in the opposite direction. The OAD is designed as a sacrificial part of the front-end accessory drive system, protecting other belt driven component as well as the alternator. The correct decoupler pulley ensures smooth, quiet performance as well as increasing vehicle gas mileage. Under normal driving conditions, the original pulley will require replacement in approx. 70,000 – 90,000 miles. Litens is the world’s largest supplier of original equipment (O.E.) power transmission products. At Litens, we design systems that are more efficient, resulting in tangible fuel economy/emissions benefits. Litens holds over 2000 patents and continues to respond to the ever-changing automotive industry by investing heavily in new technology, facilities, and people. 90% of our line is made of products coming from the OE manufacturer, which makes the Litens Tensioning Products portfolio the purest OE tensioning line in the North American aftermarket.

Product Features:

Designed and engineered by Litens Automotive. The inventor of the “OAD” (overrunning alternator decoupler).
Patented original equipment design
Protects the alternator and other front-end accessory drive components
New cap included with the OAD
Installation instructions included

from

$135.99

Litens Automotive is the original equipment supplier for the 2014-2018 Chevrolet Corvette, Silverado, Tahoe, Suburban / GMC Yukon, Sierra with 4.3/5.3/6.2L. This replacement pulley is also designed and produced by Litens and is exact in all form, fit, and performance characteristics as the original equipment part (with the exception of not having the car manufacturer’s logo or part number applied to the part). Decoupling pulleys are engine specific and should never be interchanged with other types of pulley technology. The Litens OAD type pulley is designed to free-wheel in one direction and, with an internal spring and damping device, softly engage in the opposite direction. The OAD is designed as a sacrificial part of the front-end accessory drive system, protecting other belt driven component as well as the alternator. The correct decoupler pulley ensures smooth, quiet performance as well as increasing vehicle gas mileage. Under normal driving conditions, the original pulley will require replacement in approx. 70,000 – 90,000 miles. Litens is the world’s largest supplier of original equipment (O.E.) power transmission products. At Litens, we design systems that are more efficient, resulting in tangible fuel economy/emissions benefits. Litens holds over 2000 patents and continues to respond to the ever-changing automotive industry by investing heavily in new technology, facilities, and people. 90% of our line is made of products coming from the OE manufacturer, which makes the Litens Tensioning Products portfolio the purest OE tensioning line in the North American aftermarket.

Product Features:

Designed and engineered by Litens Automotive. The inventor of the “OAD” (overrunning alternator decoupler).
Patented original equipment design
Protects the alternator and other front-end accessory drive components
New cap included with the OAD
Installation instructions included

from

$192.36

Are you looking for a quality replacement part for your vehicle’s electrical system? Today’s remanufactured alternator is a complex combination of inner workings, and we completely remanufacture them to our own premium standard. All terminals are cleaned and replated. The slip rings are polished or replaced to maintain proper contact. The rectifier, diodes, rotor and bearings are performance tested or replaced for maximum output. All housings are cleaned and refinished and all stators are tested for integrity and recoated for corrosion prevention.

Product Features:

OE-Equivalent Direct Fit Application.
Fully tested to meet OE specifications.
Provides exceptional reliability.

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$496.34

ACDelco GM Original Equipment Light Duty Remanufactured Alternators are engineered for virtually every make and model of GM car, light duty truck, and sport utility vehicle. Remanufacturing alternators is an industry standard practice that involves disassembly of existing units, and replacing components that are most prone to wear and failure with new components. Damaged and obsolete parts are replaced and are 100% end of line tested to ensure they perform to ACDelco specifications. In addition, remanufacturing also benefits the environment by returning components back into service rather than processing as scrap or simply disposing of them These original equipment alternators are engineered to fit your specific GM vehicle and will provide the same performance, durability, and service life you expect from General Motors. Get the GM quality you know and trust with ACDelco GM Original Equipment Starters and Alternators. Stay with the parts brand your vehicle came with and get peace of mind that the fit, form, and function is up to the high standards and specifications of General Motors. ACDelco GM OE Starters and Alternators are engineered for virtually every make and model of GM car, light-duty truck, and sport utility vehicle.

Product Features:

Contain 100% new bearings, 100% new bushings, and 100% new brushes to make the remanufactured alternator a reliable replacement
Remanufactured to meet or exceed original equipment specifications and are 100% performance-tested
Components are tested to meet original specification requirements, for remarkable durability

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$323.78

Alternator

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$452.23

ACDelco Professional NEW Alternators are manufactured with all new components and are the ideal high quality replacement for many vehicles on the road today. Key components are greased and lubricated to help ensure improved performance and long life reliability even in the toughest conditions. Alternators have 100% NEW regulators, computer tested for voltage stability, terminal function, and electronic circuit board integrity, and 100% new rectifiers, computer tested for internal resistance, AC voltage blocking capabilities, and electrical leakage. These Professional, premium aftermarket NEW alternators are manufactured to meet or exceed your expectations for fit, form, and function.

Product Features:

All components are 100% new to provide improved performance and long life reliability
Key components are 100% greased and lubricated to ensure long term reliability in harsh conditions
New units are manufactured under the guidelines of ISO Quality Standards to ensure consistent quality
ACDelco Professional NEW Alternators are computer tested for voltage stability, terminal function and electronic circuit board integrity
Engineering enhancements to internal components provide the latest, most efficient unit for your vehicle

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$456.02

ACDelco GM OE Light Duty Alternators components are newly manufactured and are a GM recommended replacement for your vehicle’s original alternator. Alternators provide power to the vehicle’s electrical systems and charges the battery while the engine is running. These original alternators are engineered to fit your specific GM vehicle and will provide the same performance, durability, and service life you expect from General Motors.

Product Features:

100% newly manufactured as an exact replacement for your GM vehicle’s original alternator
Components are tested to meet original specification requirements, for remarkable durability
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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$5.29

This starter bolt is designed to match the fit and function of the original part on specified vehicles. Made of quality materials, it is engineered for reliable performance.

Product Features:

Direct replacement – this starter bolt matches the fit and function of the factory part on specified years, makes and models.
Ideal solution – this bolt is a reliable replacement for an original part that is missing or has failed due to fatigue
Durable construction – this part is made from quality materials to ensure reliable performance and long service life
Trustworthy quality – backed by team of product experts in the United States and more than a century of automotive experience

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$170.46

TOTALLY REMANUFACTURED FROM THE INSIDE-OUT – W/Core Reliance’s remanufactured starters are re-engineered from the inside-out to exacting standards for unsurpassed reliability. Our engineers perform extensive failure-analysis on in-field OE units and update designs to rectify common causes of failures and improve dependability. Once design enhancements have been proven, our extensive remanufacturing process includes total core disassembly, extensive component replacement and stringent three-phase testing to ensure that every starter delivers the quality you can depend on – with every turn of the key.

Product Features:

Top 5 component re-engineering:
100% NEW solenoid contacts
Precision-machined drive clutch
100% NEW brushes
Test 1 – Initial sample approvals test all components to validate specifications and functionality.
Test 2 – All critical sub-assemblies are 100% tested on specialized equipment prior to final assembly.
Test 3 – Completed units are individually end-of-line tested on proprietary, load-based testers across a full range of operating requirements.
Test +: Random unit audit testing. Reliance Road Assist Card – May 1 2014

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$217.99

ACDelco Gold (Professional) Remanufactured Starters are the high quality alternative to Original Equipment (OE) parts. These starters have new bronze sintered and oil-impregnated bushings. Solenoid contacts are new with copper terminals and plated hardware. Remanufacturing starters is an industry standard practice that involves disassembly of existing units, and replacing components that are most prone to wear with new components. Damaged and obsolete parts are replaced and are end of line tested to ensure they perform to ACDelco specifications. In addition, remanufacturing returns components back into service rather than processing as scrap or simply disposing of them. 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:

Remanufactured using consistent quality processes; not just rebuilt
Starters have new bronze sintered and oil-impregnated armature bushings
Solenoid contacts are new with copper terminals and plated hardware
Performance-tested and inspected to ensure they meet your expectations for quality design and component specifications

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$197.99

Bosch Premium Starters are designed, built and tested to provide the ultimate in performance and reliability.

Product Features:

Built for extremes! Our new and reman starters and alternators are 100% factory tested to ensure reliable performance, under extremes of heat, cold and high demand
Our new and reman starters and alternators are designed to perform equal to or better than the original equipment parts, that they replace
Our new and reman starters and alternators are designed to be identical in fit and performance to original equipment parts
Our new and reman starters and alternators utilize the latest manufacturing technologies and highest quality parts to ensure the best performance and longest life

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$254.99

Carquest Premium starters are premium constructed, original equipment (O.E.) replacement parts with industry-leading warranties. Our Carquest Premium starters are designed to meet or exceed OE specifications for fit, form and function. Our starters are remanufactured by an IATF/TS 16949 certified supplier that meets the highest standards achievable. We replace all wear components (brushes, bushings and needle bearings) with new components to ensure long-life. All critical components are electronically tested during assembly and the entire unit is 100% tested, ensuring proper performance backed by an industry-leading warranty. We also offer technical support at 1-800-228-9672 for product questions, diagnostic troubleshooting and installation assistance by ASE Certified Technicians.

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$297.99

from

$229.99

Bosch Premium Starters are designed, built and tested to provide the ultimate in performance and reliability.

Product Features:

Built for extremes! Our new and reman starters and alternators are 100% factory tested to ensure reliable performance, under extremes of heat, cold and high demand
Our new and reman starters and alternators are designed to perform equal to or better than the original equipment parts, that they replace
Our new and reman starters and alternators are designed to be identical in fit and performance to original equipment parts
Our new and reman starters and alternators utilize the latest manufacturing technologies and highest quality parts to ensure the best performance and longest life

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$266.99

Carquest Professional starters are 100% new units that are built to meet or exceed original equipment (O.E.) specifications. Our new starters are engineered and built by an IATF/TS 16949 certified supplier that meets the highest standards achievable. Carquest Professional starters are re-engineered to include improvements and enhancements (where applicable) to the OE design to extend longevity and service life. Our new starters are built with all new components and are 100% triple-tested to ensure high quality that is backed by an industry-leading warranty. We also offer technical support at 1-800-228-9672 for product questions, diagnostic troubleshooting and installation assistance by ASE Certified Technicians.

Product Features:

Designed to meet or exceed OE specifications for fit, form and function
Manufactured by an IATF/TS 16949 supplier that meets or exceeds the highest standards in the industry
Housings are 100% new with dimensions computer gauged and measured to ensure proper fitment
All new components are utilized to ensure long service life
Internal electronics are upgraded for heavy duty reliability (where applicable)
Armatures and commutators are 100% load tested
Application-specific technical bulletins included where applicable
All units are 100% triple tested to ensure quality and performance
Technical support team staffed with ASE Certified Technicians: 1-800-228-10575

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$352.10

ACDelco Professional, premium NEW Starters are manufactured with all new components and are the ideal high quality replacement for many vehicles on the road today. Key components are greased and lubricated to help ensure improved performance and long life reliability even in the toughest conditions. Starters have 100% new solenoids, computer tested for contact life, coil balance, and pull strength, and 100% new drive gears/clutches, assembled under tight specifications using machine tolerances that are torque tested. These Professional, premium aftermarket NEW starters are manufactured to meet or exceed your expectations for fit, form, and function.

Product Features:

NEW units are manufactured under the guidelines of ISO Quality Standards to ensure consistent quality
All components are 100% NEW to provide improved performance and long life reliability
Engineering enhancements to internal components provide the latest, most efficient unit for your vehicle
Key components are 100% greased and lubricated to ensure long term reliability in harsh conditions
All dimensions and key mounting surfaces and contact points are gauged and measured to ensure proper fit

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$195.99

Designed to meet or exceed OE specifications for fit, form and function
Manufactured by an IATF/TS 16949 supplier that meets or exceeds the highest standards in the industry
Housings are 100% new with dimensions computer gauged and measured to ensure proper fitment
All new components are utilized to ensure long service life
Internal electronics are upgraded for heavy duty reliability (where applicable)
Armatures and commutators are 100% load tested
Application-specific technical bulletins included where applicable
All units are 100% triple tested to ensure quality and performance
Technical support team staffed with ASE Certified Technicians: 1-800-228-10525

from

$189.81

ACDelco’s Professional Remanufactured Starters are the ideal high quality replacement for many vehicles on the road today. ACDelco’s Professional Remanufactured Starters have 100% new copper and bronze sintered, oil-impregnated bushings, plus the solenoid contacts are 100% new with copper terminals and plated hardware. Remanufacturing starters is an industry standard practice that involves disassembly of existing units, and replacing components that are most prone to wear and failure with new components. Damaged and obsolete parts are replaced and are 100% end of line tested to ensure they perform to ACDelco specifications. In addition, remanufacturing also benefits the environment by returning components back into service rather than processing as scrap or simply disposing of them. These premium aftermarket reman starters are manufactured to fit a wide range of vehicles and will provide the same performance, durability, and service life you expect from ACDelco.

Product Features:

Remanufactured using consistent quality processes; not just rebuilt
Starters have 100% new copper and bronze sintered and oil-impregnated armature bushings
Solenoid contacts are 100% NEW with copper terminals and plated hardware
Performance-tested and inspected to ensure they meet ACDelco quality design and component specifications

Upgrade your 2018 GMC Sierra 1500 with Top-Quality Alternators and Starters

When it comes to maintaining or upgrading your 2018 GMC Sierra 1500, 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, Alternators and Starters are key to keeping your Sierra 1500 functioning at its best. At Advance Auto Parts, we offer a wide selection of 15 Alternators and Starters for the 2018 GMC Sierra 1500, designed to meet your needs without breaking the bank. From Ignition Lock Part replacements to Alternator Pulley Parts 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 Alternators and Starters for any vehicle can be a hassle, especially if you’re on a budget. But with Advance Auto Parts, you can find high-quality Alternators and Starters for your 2018 GMC Sierra 1500 at great prices. Our Alternators and Starters inventory for this model ranges from just $5.29 to $608.99, with an average price of $264.87. Our 15 Alternators and Starters in stock come from 10 trusted brands, so you’re sure to find the right part for your 2018 GMC Sierra 1500 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 2018 GMC Sierra 1500, we stock popular OEM and aftermarket Alternators and Starters from top names like Carquest Premium, and more. Carquest Premium Alternators and Starters start at just $136.99 and boast an impressive 4 stars average rating from customers. With 35 customer reviews and counting, our 2018 GMC Sierra 1500 Alternators and Starters 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 Alternators and Starter upgrades. Explore related part types like Batteries and Chargers, Oil and Lubricants and more to make sure your 2018 GMC Sierra 1500 is always ready to roll. We’re committed to providing you with everything you need to keep your Sierra 1500 in top shape, all in one place. Start shopping confidently below for your 2018 GMC Sierra 1500!

Best-Selling Ignition Lock Parts for 2018 GMC Sierra 1500s

Enhance the driving experience in your GMC with 1 quality Ignition Lock Part components, starting at $136.99.

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from

$136.99

Computer-Aided Design (CAD), laser scanning and 3D printing ┐ utilizing Fused Deposition Modeling (FDM) and Stereolithography (SLA) ┐ in the connector terminal design process ensures speed-to-market and a precise connector fit guaranteed.
Product constructed to meet all design and operating characteristics as intended by the vehicle manufacturer.
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.
100% end-of-line tested to ensure confidence and product reliability, every time.

Most Popular 2018 GMC Sierra 1500 Alternator Pulley Parts

Customize your GMC with 2 Alternator Pulley Parts products like Alternator Decoupler Pulleys, all priced under $135.99.

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from

$128.99

Designed and engineered by Litens Automotive. The inventor of the “OAD” (overrunning alternator decoupler).
Patented original equipment design
Protects the alternator and other front-end accessory drive components
New cap included with the OAD
Installation instructions included

from

$135.99

Litens Automotive is the original equipment supplier for the 2014-2018 Chevrolet Corvette, Silverado, Tahoe, Suburban / GMC Yukon, Sierra with 4.3/5.3/6.2L. This replacement pulley is also designed and produced by Litens and is exact in all form, fit, and performance characteristics as the original equipment part (with the exception of not having the car manufacturer’s logo or part number applied to the part). Decoupling pulleys are engine specific and should never be interchanged with other types of pulley technology. The Litens OAD type pulley is designed to free-wheel in one direction and, with an internal spring and damping device, softly engage in the opposite direction. The OAD is designed as a sacrificial part of the front-end accessory drive system, protecting other belt driven component as well as the alternator. The correct decoupler pulley ensures smooth, quiet performance as well as increasing vehicle gas mileage. Under normal driving conditions, the original pulley will require replacement in approx. 70,000 – 90,000 miles. Litens is the world’s largest supplier of original equipment (O.E.) power transmission products. At Litens, we design systems that are more efficient, resulting in tangible fuel economy/emissions benefits. Litens holds over 2000 patents and continues to respond to the ever-changing automotive industry by investing heavily in new technology, facilities, and people. 90% of our line is made of products coming from the OE manufacturer, which makes the Litens Tensioning Products portfolio the purest OE tensioning line in the North American aftermarket.

Product Features:

Designed and engineered by Litens Automotive. The inventor of the “OAD” (overrunning alternator decoupler).
Patented original equipment design
Protects the alternator and other front-end accessory drive components
New cap included with the OAD
Installation instructions included

Top Picks for 2018 GMC Sierra 1500 Alternator Parts

Upgrade GMC Sierra 1500s with top-quality Alternator Parts parts, including 6 OEM and aftermarket selections for your 2018 model.

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from

$40.99

ACDelco GM Original Equipment Pigtail Connectors are connectors ready to be spliced into vehicle harnesses, and are GM-recommended replacements for your vehicle’s original components. These original equipment pigtail connectors have been manufactured to fit your GM vehicle, providing the same performance, durability, and service life you expect from General Motors.

Product Features:

Protective outer coverings help provide long-lasting durability
Color-coded wires allow for easy installation
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

from

$608.99

Carquest Premium alternators are premium constructed, original equipment (O.E.) replacement parts with industry-leading warranties. Our Carquest Premium alternators are designed to meet or exceed OE specifications for fit, form and function. Our alternators are remanufactured by an IATF/TS 16949 certified supplier that meets the highest standards achievable. We replace all wear components (brushes, bushings and bearings) with new components to ensure long-life. All critical components are electronically tested during assembly and the entire unit is 100% tested, ensuring proper performance backed by an industry-leading warranty. We also offer technical support at 1-800-228-9672 for product questions, diagnostic troubleshooting and installation assistance by ASE Certified Technicians.

from

$543.80

Alternator

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$417.99

GM Genuine Parts Alternators are designed, engineered, and tested to rigorous standards, and are backed by General Motors. These alternators provide power to the vehicle’s electrical systems and charge the battery while the engine is running. 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:

Newly manufactured as an exact replacement for your GM vehicle’s original alternator
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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$281.99

Bosch Premium Alternators are designed, built and tested to provide the ultimate in performance and reliability.

Product Features:

Full-load tested to guarantee compliance with Bosch’s strict performance specifications
100% factory tested, units are remanufactured (not rebuilt)
Built to last – uses high quality materials and the most technologically advanced developments.

from

$232.25

Alternator

In-Demand Starter Parts for 2018 GMC Sierra 1500s

Select from 6 premium Starter Parts parts for your 2018 GMC Sierra 1500, with prices ranging from $5.29 to $412.99.

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from

$297.99

from

$297.99

from

$5.29

This starter bolt is designed to match the fit and function of the original part on specified vehicles. Made of quality materials, it is engineered for reliable performance.

Product Features:

Direct replacement – this starter bolt matches the fit and function of the factory part on specified years, makes and models.
Ideal solution – this bolt is a reliable replacement for an original part that is missing or has failed due to fatigue
Durable construction – this part is made from quality materials to ensure reliable performance and long service life
Trustworthy quality – backed by team of product experts in the United States and more than a century of automotive experience

from

$412.99

WAI is a leading parts manufacturer for the aftermarket. You’ll find superior quality and performance on all WAI 100% new alternators and starters as well as generators, motors, voltage regulators, rectifiers and other components.

Product Features:

Engineered to meet or exceed OEM specifications for a perfect fit and hassle-free installation.
Premium grade solenoids contains materials specifically selected for best conductivity. High temperature cap ensures that the solenoid works flawlessly in high heat environments. High dielectric strenght outer case resists shorting.
Armatures have precision machined and upgraded steel shaft for improved durability and performance.
Each unit includes a printed copy of the test results so you know exactly what to expect from our parts right from the first time they power on.

from

$335.99

Designed to meet or exceed OE specifications for fit, form and function
Manufactured by an IATF/TS 16949 supplier that meets or exceeds the highest standards in the industry
Housings are 100% new with dimensions computer gauged and measured to ensure proper fitment
All new components are utilized to ensure long service life
Internal electronics are upgraded for heavy duty reliability (where applicable)
Armatures and commutators are 100% load tested
Application-specific technical bulletins included where applicable
All units are 100% triple tested to ensure quality and performance
Technical support team staffed with ASE Certified Technicians: 1-800-228-10499

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$239.99

Bosch Premium Starters are designed, built and tested to provide the ultimate in performance and reliability.

Top-Rated Alternators and Starters Brands For Your 2018 GMC Sierra 1500

Shop for the best-rated brands offering Alternators and Starters and other products for your 2018 GMC Sierra 1500s. Below you’ll find some of our best rated Alternators and Starters from Carquest Premium, and more. Alternators and Starters from these brands that fit a 2018 Sierra 1500 start at just $136.99 and are rated as high as 4 stars. OEM and aftermarket Alternators and Starters don’t get more top quality, durable, and affordable than from the brands below.

Popular Carquest Premium 2018 GMC Sierra 1500 Alternators and Starters

When it comes to maintaining or upgrading your 2018 GMC Sierra 1500, using quality Alternators and Starters is essential to ensure durability and a perfect fit. Carquest Premium ticks all of those boxes. We offer a wide selection of Carquest Premium Alternators and Starters, specifically designed for the 2018 GMC Sierra 1500. With over 4 Carquest Premium brand Alternators and Starters in stock, you’re sure to find what you need. The prices for these top-notch parts start as low as $136.99, with an average price of just $335.49. Plus, with over 3 customer reviews and an average rating of 4 stars, you can trust that our Carquest Premium Alternators and Starters will get the job done right. Choose Advance Auto Parts for reliability, quality, and expert-approved parts that keep your vehicle running strong.

from
$297.99

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Starter Remanufactured Premium

“Exact replacement starter. Works great!”

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$136.99

This product is not rated

Ignition Lock Cylinder CSC2679

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from
$608.99

This product is not rated

Alternator: Remanufactured, 170 Amps

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FAQs for 2018 GMC Sierra 1500 Alternators and Starters

Which Alternators and Starters are best-sellers for 2018 GMC Sierra 1500s?

Out of 15 Alternators and Starters that fit 2018 GMC Sierra 1500s, the following parts are the top sellers:

Black Multi-Purpose Pigtail (11895137) – $40.99
Starter Mounting Bolt, Type 1 Long (11839849) – $5.29
Overrunning Alternator Decoupling (OAD) Pulley – Original Equipment Quality (11562007) – $128.99

What’s the price range for 2018 GMC Sierra 1500 Alternators and Starters?

Alternators and Starter prices for the 2018 GMC Sierra 1500 start at $5.29 and go up to $608.99 for the most premium parts.

What’s the average price of a Alternators and Starter for a 2018 GMC Sierra 1500?

The average price for Alternators and Starters for the 2018 GMC Sierra 1500 is $264.87. Keep in mind the variety of part types within our Alternators and Starter category so you are likely to find a wide range of prices across a variety of parts and components.

Does Advance Auto Parts sell Alternators and Starters for other GMC Sierra 1500 model years?

Yes, we currently carry Alternators and Starters for 23 model years of GMC Sierra 1500s between 1999 and 2022. Alternators and Starters are bought most frequently for the following model years: 2022, 2021, 2020, 2019, 2017, 2016, 2015, 2014, and 2013.

What are the cheapest Alternators and Starters for my 2018 GMC Sierra 1500?

The cheapest 2018 GMC Sierra 1500 Alternators and Starters we carry in stock are:

Starter Mounting Bolt, Type 1 Long (11839849) – $5.29
Black Multi-Purpose Pigtail (11895137) – $40.99
Overrunning Alternator Decoupling (OAD) Pulley – Original Equipment Quality (11562007) – $128.99
Overrunning Alternator Decoupling (OAD) Pulley – Original Equipment Quality (11561989) – $135.99
Ignition Lock Cylinder CSC2679 (12574339) – $136.99

What are the top-rated Alternators and Starters that fit the 2018 GMC Sierra 1500?

Out of 35 reviews by customers, our 2018 GMC Sierra 1500 Alternators and Starters have an average customer rating of . These are some of the highest-rated Alternators and Starter types for the 2018 GMC Sierra 1500 and their top-rated products:

Starter Parts
- Starter Remanufactured Premium (11888500) – $297.99
- Starter Remanufactured Premium (11888273) – $297.99

What types of Alternators and Starters do you sell for my 2018 GMC Sierra 1500?

As of 2/5/25, these are some of the most in-demand types of Alternators and Starters for a 2018 GMC Sierra 1500:

Can I get help with 2018 GMC Sierra 1500 Alternators and Starter orders?

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

What is your return policy for GMC Sierra 1500 Alternators and Starters?

Advance Auto Parts keeps returns simple. For new GMC Sierra 1500 Alternators and Starters and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.

2018 GMC Sierra 1500 Alternators and Starters

ACDelco – Ignition Lock Cylind (Part No.M5040290059ACD)

Locksmart – Ignition Lock Cylinder (Part No.LC63200)

Carquest Premium – Ignition Lock Cylinder CSA2094 (Part No.CSA2094)

Dorman – Ignition Lock Cylinder (Part No.M5040289778DOR)

Carquest Premium – Alternator Connector (Part No.PTA1047)

Carquest Premium – Alternator Connector (Part No.PTA1117)

Carquest Premium – Alternator Connector (Part No.PTA1201)

Dorman – Alternator Pigtail (Part No.645-569)

Litens – Overrunning Alternator Decoupling (OAD) Pulley – Original Equipment Quality (Part No.920091A)

Litens – Overrunning Alternator Decoupling (OAD) Pulley – Original Equipment Quality (Part No.920114A)

Litens – Overrunning Alternator Decoupling (OAD) Pulley – Original Equipment Quality (Part No.920030A)

Litens – Overrunning Alternator Decoupling (OAD) Pulley – Original Equipment Quality (Part No.920031A)

OE+ – Remanufactured Alternator (Part No.F40002246340IAP)

ACDelco – GM Original Equipment Alternator, Remanufactured (Part No.F4000414026ACD)

OE+ – Alternator (Part No.F40002247214IAP)

ACDelco – Professional Alternator, New, Computer Tested for Stability and Function (Part No.F4000576118ACD)

ACDelco – GM Original Equipment Alternator, New (Part No.F4000443059ACD)

Dorman – Help – Starter Mounting Bolt, Type 1 Long (Part No.72004)

Reliance – Tech Starter (Reman) (Part No.F5000449044RLN)

ACDelco – Starter (Part No.336-2002A)

Bosch – Premium 100% Remanufactured Starter (Part No.SR8632X)

Carquest Premium – Starter Remanufactured Premium (Part No.6970S)

Carquest Premium – Starter Remanufactured Premium (Part No.52054S)

Bosch – Premium 100% Remanufactured Starter (Part No.SR8584X)

Carquest Professional – Starter-New (Part No.6970SN)

ACDelco – Premium Professional Starter: New, Exceeds OEM Performance, Proven Reliability (Part No.F5000576399ACD)

Carquest Professional – Starter-New (Part No.6485SN)

ACDelco – Professional Starter, Remanufactured (Part No.F5000576285ACD)

Carquest Premium – Ignition Lock Cylinder CSC2679 (Part No.CSC2679)

Litens – Overrunning Alternator Decoupling (OAD) Pulley – Original Equipment Quality (Part No.920030A)

Litens – Overrunning Alternator Decoupling (OAD) Pulley – Original Equipment Quality (Part No.920031A)

ACDelco – Black Multi-Purpose Pigtail (Part No.PT2787)

Carquest Premium – Alternator: Remanufactured, 170 Amps (Part No.10369A)

DENSO – Alternator (Part No.F40001579483ND)

GM Genuine Parts – Alternator: New, 150 Amps (Part No.84143543)

Bosch – Alternator: Remanufactured, 170 Amps (Part No.AL8869X)

OE+ – Alternator (Part No.F40001905959IAP)

Carquest Premium – Starter Remanufactured Premium (Part No.52054S)

Carquest Premium – Starter Remanufactured Premium (Part No.52055S)

Dorman – Help – Starter Mounting Bolt, Type 1 Long (Part No.72004)

WAI – 1.4kW/12 Volt, CW, 10Tooth Pinion (Part No.10910N)

Carquest Professional – Starter-New (Part No.52055SN)

Bosch – Remanufactured Starter (Part No.SR8673X)