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2003 GMC Sierra 2500 Alternator
Your 2003 GMC Sierra 2500 might be the best vehicle you’ve ever owned. Or you may just be struggling to keep it highway-approved. No matter the situation, Advance Auto Parts has the Alternator product you desperately need.
We currently carry 23 Alternator products to choose from for your 2003 GMC Sierra 2500, and our inventory prices range from as little as $131.99 up to $437.99.
On top of low prices, Advance Auto Parts offers 7 different trusted brands of Alternator products for the 2003 GMC Sierra 2500. We only sell parts from trusted brands like Carquest so that you can find quality parts you can count on.
Don’t take our word for it - check out customer ratings and reviews to buy with confidence. We have 287 reviews on our Alternator products for the 2003 GMC Sierra 2500 from previous customers.
Have parts delivered straight to your home, or find the nearest Advance Auto Parts store to check out our Alternator stock in-person!
Alternator for Your 2003 GMC Sierra 2500
Search through our amazing selection of Alternator products for your 2003 GMC Sierra 2500 to find exactly what you’re looking for. Compare prices and reviews to choose the best part for you.
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ACDelco - GM Original Equipment Alternator, Remanufactured (Part No. F4000448948ACD)
DescriptionACDelco 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
Read 1 review(s)Review snapshot ® by PowerReviews
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Great product and price
Great product and price
Submitted 2010-12-04
By 97T&C
From Raleigh, NC
Get product to replace your broken one.
Bottom Line recommended
from $332.94
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Carquest Premium - Alternator: Remanufactured, 145 Amps (Part No. 8292A)
DescriptionCarquest Premium Alternators are thoroughly inspected and tested to meet or exceed OE specifications. Every unit is 100% performance tested from components through final assembly, to ensure dependable service and reliable performance. Remanufactured (not rebuilt) to meet or exceed OE quality in fit, form, and function.
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
- Regulators and rectifiers are 100% load tested for reliable charging performance
- Remanufactured by a IATF/TS 16949 certified supplier that meets the highest standards achievable for an automotive parts supplier
- Tech Hotline with trained ASE Certified Technicians: Call Technical Support at 1-800-228-9672
Read 3 review(s)Review snapshot ® by PowerReviews
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You pay for what you get
You pay for what you get
Submitted 2022-02-10
By Dustin the irritated
From Minnesota sonnnnnnnn
Lasted a few days. Now voltage is all over the place. Lights flickering etc. pretty sure the regulator already took a dumb. Nice quality "rebuilt". So now I get to warranty this thing out god knows how many times until I get my full refund and go buy OEM like I should have. Reman alternators are usually a pain
Bottom Line not recommended
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Yes
Yes
Submitted 2021-12-30
By James
From Anderson sc
So far so good
Bottom Line recommended
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no
no
Submitted 2021-10-18
By Randy
From Undisclosed
alternator did not work
Bottom Line NULL
from $196.99
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Carquest Premium - Alternator: Remanufactured, 105 Amps (Part No. 8247A)
DescriptionCarquest Premium Alternators are thoroughly inspected and tested to meet or exceed OE specifications. Every unit is 100% performance tested from components through final assembly, to ensure dependable service and reliable performance. Remanufactured (not rebuilt) to meet or exceed OE quality in fit, form, and function.
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
- Regulators and rectifiers are 100% load tested for reliable charging performance
- Remanufactured by a IATF/TS 16949 certified supplier that meets the highest standards achievable for an automotive parts supplier
- Tech Hotline with trained ASE Certified Technicians: Call Technical Support at 1-800-228-9672
Read 3 review(s)Review snapshot ® by PowerReviews
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No reason not to buy it
No reason not to buy it
Submitted 2022-01-27
By B
From Lynchburg, va
Fit the way it was supposed too. Same brand as the 20 year old alternator I took out of my truck
Bottom Line recommended
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Works great!
Works great!
Submitted 2021-12-17
By Kevin
From Columbus ms
Easy to put on and worked immediately.
Bottom Line recommended
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I would buy this same brand again
I would buy this same brand again
Submitted 2021-07-15
By John
From Undisclosed
Works great
Bottom Line NULL
from $199.99
View Product -
Carquest Professional - Alternator: New, 105 Amps (Part No. 8247AN)
DescriptionCarquest Professional Alternators are 100% New to ensure the highest level of quality and reliability. Carquest Professional Alternators are re-engineered to include improvements (where applicable) on the OE design to extend longevity in service life.
Product Features:- Manufactured to meet or exceed OE quality using premium components
- Each unit is triple tested to ensure the best in quality and performance
- Internal components are engineered to enhance performance
- Manufactured by a IATF/TS 16949 certified supplier that meets the highest standards achievable for an automotive parts supplier
- Tech Hotline with trained ASE Certified Technicians: Call Technical Support at 1-800-228-9672
Read 3 review(s)Review snapshot ® by PowerReviews
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Great product
Great product
Submitted 2021-09-05
By Aurelio
From Undisclosed
It looks like a very good product, it definitely fixed my problem
Bottom Line NULL
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Good price.
Good price.
Submitted 2021-08-04
By George
From Undisclosed
New alternator. Operated properly as it should
Bottom Line NULL
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Looks great and works good
Looks great and works good
Submitted 2021-07-26
By bill
From Undisclosed
working great
Bottom Line NULL
from $249.99
View Product -
Carquest Standard - Alternator: Remanufactured, 145 Amps (Part No. 8464AV)
DescriptionCarquest Standard Alternators are thoroughly inspected and tested to meet OE specifications.
Product Features:- Designed and built to meet OEM quality in fit, form, and function
- Remanufactured by a IATF/TS 16949 certified supplier that meets the highest standards achievable for an automotive parts supplier
- Tech Hotline with trained ASE Certified Technicians: Call Technical Support at 1-800-228-9672
Read 3 review(s)Review snapshot ® by PowerReviews
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I would not buy this product again
I would not buy this product again
Submitted 2022-05-20
By J Par
From Perry, Ga
Purchased this alternator in February 2022, had to return it in March 2022 due to pulley bearings failing. The exchanged it at no cost. That one lasted until May 2022 and the same failure accrued.
Bottom Line not recommended
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Nice Part
Nice Part
Submitted 2022-01-12
By The Maintenance Man
From Falling Waters, Wv
Exact fit, Perfect match,
Bottom Line recommended
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Great starter
Great starter
Submitted 2021-10-23
By Carla
From Undisclosed
Works great
Bottom Line NULL
from $153.99
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Carquest Standard - Alternator: Remanufactured, 105 Amps (Part No. 8247AV)
DescriptionCarquest Standard Alternators are thoroughly inspected and tested to meet OE specifications.
Product Features:- Designed and built to meet OEM quality in fit, form, and function
- Remanufactured by a IATF/TS 16949 certified supplier that meets the highest standards achievable for an automotive parts supplier
- Tech Hotline with trained ASE Certified Technicians: Call Technical Support at 1-800-228-9672
from $131.99
View Product -
Carquest Professional - Alternator: New, 145 Amps (Part No. 8292AN)
DescriptionCarquest Professional Alternators are 100% New to ensure the highest level of quality and reliability. Carquest Professional Alternators are re-engineered to include improvements (where applicable) on the OE design to extend longevity in service life.
Product Features:- Manufactured to meet or exceed OE quality using premium components
- Each unit is triple tested to ensure the best in quality and performance
- Internal components are engineered to enhance performance
- Manufactured by a IATF/TS 16949 certified supplier that meets the highest standards achievable for an automotive parts supplier
- Tech Hotline with trained ASE Certified Technicians: Call Technical Support at 1-800-228-9672
from $233.99
View Product -
ACDelco - Alternator (Part No. 334-2529A)
DescriptionACDelco Gold (Professional) Remanufactured Alternators are the high quality alternative to Original Equipment (OE) parts. These alternators use high-quality bearings with high-temp lubricant and double-lipped rubber seals. Rotors and stators are electronically tested and then sealed with secondary insulating coating. Remanufacturing alternators 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
- Alternators use high-quality bearings with high-temp lubricant and double-lipped rubber seals, reducing friction, vibration, and noise
- Rotors and stators are electronically tested and then sealed with secondary insulating coating to help prevent shorts
- Performance-tested and inspected to ensure they meet your expectations for quality design and component specifications
- Remanufacturing is an industry standard practice that returns parts into service rather than scrapping them
- Tested to ensure they perform to ACDelco specifications
from $196.99
View Product -
ACDelco - Professional Alternator, Remanufactured (Part No. F4000576020ACD)
DescriptionACDelco's Professional Remanufactured Alternators are the ideal high quality replacement for many vehicles on the road today. ACDelco's Professional Remanufactured Alternators use high-quality bearings with high-temp lube and double-lipped rubber seals. Rotors and stators are electronically tested and then sealed with secondary insulating coating. 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 premium aftermarket reman alternators 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
- Alternators use high-quality bearings with high-temp lube and double-lipped rubber seals, reducing friction, vibration, and noise
- Rotors and stators are electronically tested and then sealed with secondary insulating coating to help prevent shorts
- All units are 100% performance tested and inspected to ensure they meet ACDelco quality design and component specifications
from $164.37
View Product -
ACDelco - Alternator (Part No. 334-2491A)
DescriptionACDelco Gold (Professional) Remanufactured Alternators are the high quality alternative to Original Equipment (OE) parts. These alternators use high-quality bearings with high-temp lubricant and double-lipped rubber seals. Rotors and stators are electronically tested and then sealed with secondary insulating coating. Remanufacturing alternators 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
- Alternators use high-quality bearings with high-temp lubricant and double-lipped rubber seals, reducing friction, vibration, and noise
- Rotors and stators are electronically tested and then sealed with secondary insulating coating to help prevent shorts
- Performance-tested and inspected to ensure they meet your expectations for quality design and component specifications
- Remanufacturing is an industry standard practice that returns parts into service rather than scrapping them
- Tested to ensure they perform to ACDelco specifications
from $204.99
View Product -
ACDelco - Alternator (Part No. 321-2128)
DescriptionGM Genuine Parts Remanufactured Alternators are designed, engineered, and tested to rigorous standards, and are backed by General Motors. Remanufacturing alternators 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 GM specifications. In addition, remanufacturing returns components back into service rather than processing as scrap or simply disposing of them. 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 ACDelco GM Original Equipment parts may have formerly appeared as GM Genuine Parts (OE) or ACDelco Professional
- Remanufacturing is an industry standard practice that returns parts into service rather than scrapping them
- Tested to ensure they perform to GM specifications
from $437.99
View Product -
ACDelco - Professional Alternator, Remanufactured (Part No. F4000576016ACD)
DescriptionACDelco's Professional Remanufactured Alternators are the ideal high quality replacement for many vehicles on the road today. ACDelco's Professional Remanufactured Alternators use high-quality bearings with high-temp lube and double-lipped rubber seals. Rotors and stators are electronically tested and then sealed with secondary insulating coating. 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 premium aftermarket reman alternators 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
- Alternators use high-quality bearings with high-temp lube and double-lipped rubber seals, reducing friction, vibration, and noise
- Rotors and stators are electronically tested and then sealed with secondary insulating coating to help prevent shorts
- All units are 100% performance tested and inspected to ensure they meet ACDelco quality design and component specifications
from $164.36
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Bosch - Professional Preferred Alternator, New (Part No. F4000162354BOS)
DescriptionBosch has been a major supplier of new alternators and starters to OE vehicle manufacturers since 1913. Securing OE certification requires strict adherence to stringent precision and performance criteria. These same exacting criteria are also applied in the manufacturing of all Bosch aftermarket alternators and starters. Whether 100% remanufactured or new, Bosch Premium Alternators and Starters are quality built and 100% factory tested to ensure years of reliable performance, even under the most extreme operating conditions. That's why they are preferred by more professional installers.
Product Features:- Built with original equipment quality components to withstand excessive heat and high electrical demand
- Identical in fit and performance to the OE parts they replace
- The perfect solution for certain problematic late-model applications that place an extreme burden on unit components in a high-heat environment
- 100% full-load tested for proven starting/charging performance
from $261.54
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Bosch - Alternator (Part No. F40001332255BOS)
from $223.80
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ACDelco - Alternator (Part No. 321-2108)
DescriptionGM Genuine Parts Remanufactured Alternators are designed, engineered, and tested to rigorous standards, and are backed by General Motors. Remanufacturing alternators 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 GM specifications. In addition, remanufacturing returns components back into service rather than processing as scrap or simply disposing of them. 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 ACDelco GM Original Equipment parts may have formerly appeared as GM Genuine Parts (OE) or ACDelco Professional
- Remanufacturing is an industry standard practice that returns parts into service rather than scrapping them
- Tested to ensure they perform to GM specifications
from $388.99
View Product -
OE+ - Remanufactured Alternator (Part No. F40002246897IAP)
DescriptionAre 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.
from $139.12
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ACDelco - GM Original Equipment Alternator, Remanufactured (Part No. F4000451806ACD)
DescriptionACDelco 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
from $399.90
View Product -
ACDelco - Alternator (Part No. 321-2104)
DescriptionGM Genuine Parts Remanufactured Alternators are designed, engineered, and tested to rigorous standards, and are backed by General Motors. Remanufacturing alternators 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 GM specifications. In addition, remanufacturing returns components back into service rather than processing as scrap or simply disposing of them. 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 ACDelco GM Original Equipment parts may have formerly appeared as GM Genuine Parts (OE) or ACDelco Professional
- Remanufacturing is an industry standard practice that returns parts into service rather than scrapping them
- Tested to ensure they perform to GM specifications
from $366.99
View Product -
ACDelco - GM Original Equipment Alternator, Remanufactured (Part No. F4000575952ACD)
DescriptionACDelco 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
from $283.00
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Reliance - Alternator (Part No. F400089320RLN)
from $246.78
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Bosch - Professional Preferred Alternator, Remanufactured (Part No. F4000162355BOS)
DescriptionBosch has been a major supplier of new alternators and starters to OE vehicle manufacturers since 1913. Securing OE certification requires strict adherence to stringent precision and performance criteria. These same exacting criteria are also applied in the manufacturing of all Bosch aftermarket alternators and starters. Whether 100% remanufactured or new, Bosch Premium Alternators and Starters are quality built and 100% factory tested to ensure years of reliable performance, even under the most extreme operating conditions. That's why they are preferred by more professional installers.
Product Features:- Built to last using the highest quality materials and the most technologically advanced manufacturing processes
- Remanufactured using more new parts than any other unit
- 100% exhaustive multipoint quality and performance testing throughout the remanufacturing process ensures optimum starting and charging performance under all operating conditions
- Every unit is full-load tested to guarantee compliance with Bosch strict performance specifications
- Voltage regulator 100% tested for OE voltage specifications (new on GM and Ford)
- Rectifier 100 % tested (new on Ford)
- Diodes 100% tested (replaced with new as required)
- Rotor 100% performance-tested for maximum electrical output
- 100% new long life sealed bearings with special high load, high temperature grease
- Stator 100% insulation and phase balance tested
- Slip rings 100% new or remachined to +/- .05mm, the tightest tolerance in the industry
- 100% new long life self-lubricating brushes
- 100% new clutch pulleys
- All terminals, insulators and hardware provided
from $196.67
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Reliance - Alternator (Part No. F4000921563RLN)
from $169.18
View Product -
OE+ - Remanufactured Alternator (Part No. F40002246340IAP)
DescriptionAre 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.
from $169.18
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FAQs for 2003 GMC Sierra 2500 Alternator Products
What are the most popular Alternator for the 2003 GMC Sierra 2500?
With 7 brands you can trust, our most popular Alternator products for the 2003 GMC Sierra 2500 parts are:What are the top-rated 2003 GMC Sierra 2500 Alternator products?
Top-rated Alternator products for your 2003 GMC Sierra 2500 based on customer reviews/ratings are: