GMC Sierra 2500 Alternators and Starters

Essential GMC Sierra 2500 Alternators and Starters

Carquest Premium – Multi-Use Connector (Part No.PTA1047)

Multi-Use Connector

from

$20.99
Modern vehicles may have 100 or more electrical harness connectors in every operating system of the vehicle. Terminal tension may weaken with time or corrosion may occur within the connector housing making replacement necessary. When replacing any harness-connector assembly approved wire termination methods must be followed to ensure a successful and long-term solution to the original problem is made. A failed terminal connection, terminal corrosion or damaged wire will result in an electrical system fault.

Product Features:
  • Carquest electrical connectors meet or exceed OE wire gauge, insulation, and terminal material requirements.
  • 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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Dorman – Alternator Pigtail (Part No.645-569)

Alternator Pigtail

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$47.99
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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Carquest Premium – Multi-Use Connector (Part No.PTA1201)

Multi-Use Connector

from

$31.99
Modern vehicles may have 100 or more electrical harness connectors in every operating system of the vehicle. Terminal tension may weaken with time or corrosion may occur within the connector housing making replacement necessary. When replacing any harness-connector assembly approved wire termination methods must be followed to ensure a successful and long-term solution to the original problem is made. A failed terminal connection, terminal corrosion or damaged wire will result in an electrical system fault.

Product Features:
  • Carquest electrical connectors meet or exceed OE wire gauge, insulation, and terminal material requirements.
  • 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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Carquest Premium – New Voltage Regulator (Part No.RAA3137)

New Voltage Regulator

from

$48.99
CARQUEST Voltage Regulators are engineered and created by an automotive charging system manufacturer designed to meet or exceed OEM specifications.

Product Features:
  • CARQUEST Voltage Regulators are designed to match OE fit, form and function. Fitted with critical OEM electronic components results in longer life expectancy.
  • CARQUEST Voltage Regulators are mechanically designed with utilization of surface mount technology, robust mechanical housing, and consistent encapsulation to protect against moistures & vibration.
  • CARQUEST Voltage Regulators uses surface mount technology and uniform encapsulation to protect against moistures & vibration.
  • CARQUEST Voltage Regulators are 100% individually tested for all product functionalities that includes the proper voltage set-point, power capabilities, and other product specifications.
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Carquest Premium – Starter: Remanufactured, Limited Lifetime Warranty (Part No.6489S)

Starter: Remanufactured, Limited Lifetime Warranty

from

$176.99
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 a Limited 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:


    Product Features:
    • Each unit is triple-tested to ensure quality and performance
    • All wear components (brushes, bushings, and bearings) are replaced with all NEW components in the remanufacturing process
    • Tech Hotline with trained ASE Certified Technicians: Call Carquest Technical Support at 1-800-228-9672
    • Remanufactured to meet or exceed OE specifications for fit, form, and function, ensuring reliable performance and compatibility.
    • 100% electronic testing of all critical components and the entire unit guarantees optimal functionality and durability.
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Carquest Professional – Starter: New, Limited Lifetime Warranty (Part No.6489SN)

Starter: New, Limited Lifetime Warranty

from

$188.99
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:


    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: 1-800-228-9672
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Carquest Premium – Starter: Remanufactured, Limited Lifetime Warranty (Part No.6492S)

Starter: Remanufactured, Limited Lifetime Warranty

from

$199.99
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 a Limited 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:


    Product Features:
    • Each unit is triple-tested to ensure quality and performance
    • All wear components (brushes, bushings, and bearings) are replaced with all NEW components in the remanufacturing process
    • Tech Hotline with trained ASE Certified Technicians: Call Carquest Technical Support at 1-800-228-9672
    • Remanufactured by an IATF/TS 16949 certified supplier, ensuring adherence to the highest industry standards for quality and reliability.
    • Entire unit undergoes 100% electronic testing during assembly to guarantee optimal performance and durability.
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Carquest Premium – Alternator: Remanufactured, 145 Amps, Limited Lifetime Warranty (Part No.8292A)

Alternator: Remanufactured, 145 Amps, Limited Lifetime Warranty

from

$230.99
This remanufactured alternator delivers reliable performance with a robust 145.0-amp output and a 12.0 VDC voltage rating, ensuring your vehicle’s electrical systems operate at peak efficiency. Designed for durability and precision, it features a clockwise (right) rotation direction and belongs to the trusted Delco family, known for quality and dependability. Whether you’re powering essential components or additional accessories, this alternator is engineered to meet the demands of modern vehicles. Its remanufactured design offers a cost-effective solution without compromising on performance, making it an excellent choice for those seeking value and reliability.

Product Features:
  • Provides a robust 145-amp output to ensure optimal performance for your vehicle’s electrical systems.
  • Engineered with a clockwise rotation direction for precise compatibility with modern vehicle designs.
  • Remanufactured design offers a cost-effective solution while maintaining high-quality performance standards.
  • Belongs to the trusted Delco family, renowned for reliability and durability in automotive electrical components.
  • Designed to efficiently power both essential vehicle systems and additional accessories.
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Bosch – Alternator: Remanufactured, 105 Amps, 2 Year Limited Warranty (Part No.AL8730X)

Alternator: Remanufactured, 105 Amps, 2 Year Limited Warranty

from

$239.99
The Bosch Premium Alternator delivers exceptional performance and reliability, making it a top choice for your vehicle’s electrical system. With a robust 105-amp output and 12 VDC voltage, this alternator ensures consistent power delivery for all your automotive needs. Engineered with precision, it features full-load testing to meet Bosch’s stringent performance standards and is 100% factory tested for quality assurance. Unlike rebuilt units, this alternator is remanufactured using high-quality materials and cutting-edge technology, ensuring long-lasting durability. Its clockwise rotation direction and advanced design make it a dependable replacement part that stands up to demanding conditions. Choose this alternator for a reliable, high-performance solution that keeps your vehicle running smoothly.

Product Features:


    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.
    • Provides consistent 105-amp output to support demanding electrical systems and ensure reliable power delivery.
    • Engineered with a clockwise rotation design for seamless integration and optimal performance in compatible vehicles.
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Carquest HD Electrical – Alternator: New, 105 Amps (Part No.71-8247N)

Alternator: New, 105 Amps

from

$201.99
Carquest Alternators with 100% NEW construction will restore hard working vehicles to exceed OE specified performance and endurance. All new units offer unmatched performance and reduce downtime.

Product Features:


    Product Features:
    • Contains Innovative Brush-less and Premium Bruch Components that have been tested and certified for highest possible power output
    • Stator wound to OE specifications. Heavy Coated Polyester wire provides consistent conductivity
    • Connectors and power transmission components are highly resistant to extreme moisture environments because we use nickel plated contactors and double armature coating. We maintain a rigorous test schedule with endurance, salt spray, dirt and grime and out
    • Integrated magnetic switch provides protection against weak power from batteries.
    • Over-Crank Protection (OCP) Monitors heat in starter from over cranking & shuts down starter to prevent burning
    • Precision design and machining are the Extreme vibration failure solution. Vehicles often perform in adverse conditions like extreme temperatures that create tolerance shifts that produce high frequency vibration, which leads to resistance in power transf
    • Load dump protection ensures transient voltage spikes do not damage transistor
    • Improved power transmission with lower engine speed keeps accessories and powered implements running at maximum output without additional load to the engine.
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Carquest Premium – Multi-Use Connector (Part No.PTA1127)

Multi-Use Connector

from

$19.99
Modern vehicles may have 100 or more electrical harness connectors in every operating system of the vehicle. Terminal tension may weaken with time or corrosion may occur within the connector housing making replacement necessary. When replacing any harness-connector assembly approved wire termination methods must be followed to ensure a successful and long-term solution to the original problem is made. A failed terminal connection, terminal corrosion or damaged wire will result in an electrical system fault.

Product Features:
  • Carquest electrical connectors meet or exceed OE wire gauge, insulation, and terminal material requirements.
  • 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
See More

Carquest Premium – Ignition Lock Cylinder (Part No.CSC1509)

Ignition Lock Cylinder

from

$60.99
The Ignition switch is the main power switched distribution point in every vehicle. The ignition switch in some manner will be connected directly to the vehicle battery and then supply power out to every operating system in the vehicle that is required to be connected and disconnected from the vehicle’s battery or power source.

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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ACDelco – Uncoded Ignition Lock Cylinder (Part No.D1469G)

Uncoded Ignition Lock Cylinder

from

$50.99
An ACDelco GM Original Equipment Ignition Lock Cylinder is a GM-recommended replacement for your vehicle’s original component. The ignition lock cylinder is where you insert and turn the key to start the vehicle. When the correct key is inserted, the cylinder is unlocked and can be rotated. The ignition lock cylinder is connected to the ignition switch, and it also engages and disengages the steering column lock. This original equipment ignition lock cylinder has 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
  • 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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Carquest Premium – Ignition Lock Cylinder (Part No.CSA2094)

Ignition Lock Cylinder

from

$49.99
The Ignition switch is the main power switched distribution point in every vehicle. The ignition switch in some manner will be connected directly to the vehicle battery and then supply power out to every operating system in the vehicle that is required to be connected and disconnected from the vehicle’s battery or power source.

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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Dorman – Ignition Lock Cylinder Housing with Passlock Sensor (Part No.924-713)

Ignition Lock Cylinder Housing with Passlock Sensor

from

$149.99
Steering column jammed or ignition switch not working? This ignition lock housing is a direct replacement for an inoperable original equipment lock housing to help restore ignition lock functions.

Product Features:
  • Direct replacement – this ignition lock housing matches the fit and function of the original equipment lock housing
  • Durable materials – this lock housing is made from quality materials for reliable service
  • Easy to install – no special tools required to install this lock housing
  • Quality tested – this part has undergone vehicle try-on and material testing
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Carquest – Multi-Purpose Relay (Part No.84C1004)

Multi-Purpose Relay

from

$21.99
Relays are electrical switches used to convert a small electrical load into a circuit capable of handling a high amperage load. Computers and small switches are not designed to carry the higher amperage requirement of a circuit that may have an electric motor, solenoid, or high amperage lighting fixture. Within a relay are contacts that are controlled with electromagnetism, when the circuit switch commands the device on or off, magnetism will pull or release the contact arm closing or opening the contacts within the relay that carry the voltage.

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.
  • 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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Carquest Premium – Multi-Purpose Relay (Part No.SBC2109)

Multi-Purpose Relay

from

$39.99
Relays are electrical switches used to convert a small electrical load into a circuit capable of handling a high amperage load. Computers and small switches are not designed to carry the higher amperage requirement of a circuit that may have an electric motor, solenoid, or high amperage lighting fixture. Within a relay are contacts that are controlled with electromagnetism, when the circuit switch commands the device on or off, magnetism will pull or release the contact arm closing or opening the contacts within the relay that carry the voltage.

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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Helping You Find the Right Alternators and Starters for Your GMC Sierra 2500

You love your Sierra 2500. So we’ve made it easier than ever to help you find GMC Sierra 2500 Alternators and Starters in our online catalog. Our inventory holds 53 aftermarket and OEM Alternators and Starters for your GMC Sierra 2500, ranging from $19.99 to $512.99.

We offer parts from 11 brands trusted to make quality Alternators and Starters for your GMC Sierra 2500. Before you buy, take some time to read through customer reviews. We currently have 6,399 reviews of GMC Sierra 2500 Alternators and Starters from previous customers. Some of the top rated parts include Starter: Remanufactured, Limited Lifetime Warranty with 4.5 stars and Alternator: New, 105 Amps, Limited Lifetime Warranty with 4.5 stars.

Find your Sierra 2500 Alternators and Starters here, order online, and have your order shipped directly to your home. Prefer to have an in-person look at your GMC Sierra 2500 part to confirm it’s just right? You can find your nearest Advance Auto Parts store and confirm they have the part in stock before heading over.

Top Alternators and Starters Brands for Your GMC Sierra 2500

Our inventory holds Alternators and Starters for your GMC Sierra 2500 from 11 trusted brands. You’ll find OEM and aftermarket parts from brands like Carquest Premium, Carquest, and Carquest Professional, all of which can keep that GMC happy.

Top-Rated Carquest Standard Alternators and Starters

Leading Carquest Standard Alternators and Starters

We carry Carquest Standard brand parts for your GMC Sierra 2500 across several catalog categories, including Alternator Parts. Some of our most reviewed Carquest Standard parts include:

FAQs for GMC Sierra 2500 Alternators and Starters

What are the most purchased Alternators and Starters for the GMC Sierra 2500?

Out of 53 Alternators and Starters for the GMC Sierra 2500, the most popular in our inventory are:

What are the top-rated GMC Sierra 2500 Alternators and Starters?

Top-rated Alternators and Starters for your GMC Sierra 2500 based on customer reviews/ratings are:
Starter: Remanufactured, Limited Lifetime Warranty
from $176.99
(99)
Starter: Remanufactured, Limited Lifetime Warranty
“Exact match and works good”
Alternator: New, 105 Amps, Limited Lifetime Warranty
from $255.99
(75)
Alternator: New, 105 Amps, Limited Lifetime Warranty
“Works good. Just remember to make sure you have field with the key on. And hook the regulator up after the battery”
Starter: New, Limited Lifetime Warranty
from $221.99
(69)
Starter: New, Limited Lifetime Warranty
“The new starter if very fast for a quick start.”