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2021 GMC Sierra 1500
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Price Match Guarantee
60-Day Returns
Lifetime Replacement
2021 GMC Sierra 1500

Alternators

A bad alternator will give you all sorts of problems: power windows and dashboard lights that don’t work, headlights that are dim or flickering, or even a car that stalls or is hard to start. Save yourself the headache by getting a high-quality replacement alternator here at CarParts.com. Our alternators are engineered by respected industry veterans in world-class manufacturing facilities, so you know you’re getting a heavy-duty part that went through strict quality control. Choose from a wide range of new and remanufactured alternators for any location (upper, lower, primary, auxiliary, etc.). Take a look at our products today and get big savings on a replacement alternator.
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With 170 Amp Alternator, Remanufactured, 6 Cyl 4.3L -
Quality-Built®
With 170 Amp Alternator, Remanufactured, 6 Cyl 4.3L -
Part Number: MPA11815
Guaranteed to Fit
$114.99

+ $42.70 Refundable Core Charge

Vehicle Fitment
  • 2021 GMC Sierra 1500 Base 8 Cyl 5.3L With 170 Amp Alternator
  • 2021 GMC Sierra 1500 SLT 8 Cyl 6.2L With 170 Amp Alternator
  • 2021 GMC Sierra 1500 Elevation 8 Cyl 5.3L With 170 Amp Alternator
  • 2021 GMC Sierra 1500 AT4 8 Cyl 6.2L With 170 Amp Alternator
  • 2021 GMC Sierra 1500 Denali 8 Cyl 6.2L With 170 Amp Alternator
  • 2021 GMC Sierra 1500 SLE 8 Cyl 5.3L With 170 Amp Alternator
  • 2021 GMC Sierra 1500 Denali 8 Cyl 5.3L With 170 Amp Alternator
  • 2021 GMC Sierra 1500 SLT 8 Cyl 5.3L With 170 Amp Alternator
  • 2021 GMC Sierra 1500 AT4 8 Cyl 5.3L With 170 Amp Alternator
  • 2021 GMC Sierra 1500 Base 6 Cyl 4.3L With 170 Amp Alternator
Product Details
Condition : RemanufacturedQuantity Sold : Sold individuallyWarranty : 1-year Quality-Built limited warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemicals including heavy metals including Chromium and Barium, which is known to the State of California to cause cancer and reproductive harm. For more information go to www.P65Warnings.ca.gov.

Alternator, 4-Door, Extended Cab Pickup, 220 Amp Gen(KW5), Labeled 13539728, 2.7L -
AC Delco®
Alternator, 4-Door, Extended Cab Pickup, 220 Amp Gen(KW5), Labeled 13539728, 2.7L -
Part Number: AC13539728
Guaranteed to Fit
$269.99
Vehicle Fitment
  • 2021 GMC Sierra 1500 SLE 4 Cyl 2.7L 4-Door, Crew Cab Pickup, 220 Amp Gen(KW5), Labeled 13539728
  • 2021 GMC Sierra 1500 Elevation 4 Cyl 2.7L 4-Door, Extended Cab Pickup, 220 Amp Gen(KW5), Labeled 13539728
  • 2021 GMC Sierra 1500 Base 4 Cyl 2.7L 4-Door, Extended Cab Pickup, 220 Amp Gen(KW5), Labeled 13539728
Product Details
Quantity Sold : Sold individuallyWarranty : 24-months or unlimited mile AC Delco limited warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Recommended Use : OE ReplacementProduct Fit : Direct Fit
With 220 Amp Alternator, Remanufactured, 8 Cyl 6.2L, OE Replacement Series -
Quality-Built®
With 220 Amp Alternator, Remanufactured, 8 Cyl 6.2L, OE Replacement Series -
Part Number: MPA10379
Guaranteed to Fit
$311.99

+ $42.70 Refundable Core Charge

Vehicle Fitment
  • 2021 GMC Sierra 1500 SLT 8 Cyl 6.2L With 220 Amp Alternator
  • 2021 GMC Sierra 1500 Denali 8 Cyl 6.2L With 220 Amp Alternator
  • 2021 GMC Sierra 1500 AT4 8 Cyl 5.3L With 220 Amp Alternator
  • 2021 GMC Sierra 1500 Base 8 Cyl 5.3L With 220 Amp Alternator
  • 2021 GMC Sierra 1500 Elevation 8 Cyl 5.3L With 220 Amp Alternator
  • 2021 GMC Sierra 1500 AT4 8 Cyl 6.2L With 220 Amp Alternator
  • 2021 GMC Sierra 1500 SLE 8 Cyl 5.3L With 220 Amp Alternator
  • 2021 GMC Sierra 1500 Denali 8 Cyl 5.3L With 220 Amp Alternator
  • 2021 GMC Sierra 1500 SLT 8 Cyl 5.3L With 220 Amp Alternator
  • 2021 GMC Sierra 1500 Base 6 Cyl 4.3L With 220 Amp Alternator
Product Details
Condition : RemanufacturedQuantity Sold : Sold individuallyWarranty : 1-year Quality-Built limited warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Series : OE Replacement SeriesRecommended Use : OE Replacement
Alternator, Remanufactured, 4 Cyl 2.7L -
Quality-Built®
Alternator, Remanufactured, 4 Cyl 2.7L -
Part Number: MPA11818
Guaranteed to Fit
$406.49

+ $53.68 Refundable Core Charge

Vehicle Fitment
  • 2021 GMC Sierra 1500 SLE 4 Cyl 2.7L
  • 2021 GMC Sierra 1500 Elevation 4 Cyl 2.7L
  • 2021 GMC Sierra 1500 Base 4 Cyl 2.7L
Product Details
Condition : RemanufacturedQuantity Sold : Sold individuallyWarranty : 1-year Quality-Built limited warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemicals including heavy metals including Chromium and Barium, which is known to the State of California to cause cancer and reproductive harm. For more information go to www.P65Warnings.ca.gov.

OE Replacement OE Replacement Series Alternator, Remanufactured
Quality-Built®
OE Replacement OE Replacement Series Alternator, Remanufactured
Part Number: MPA10385
Guaranteed to Fit
$467.49

+ $36.60 Refundable Core Charge

Vehicle Fitment
  • 2021 GMC Sierra 1500 Denali 6 Cyl 3.0L With 220 Amp Alternator
  • 2021 GMC Sierra 1500 Elevation 6 Cyl 3.0L With 220 Amp Alternator
  • 2021 GMC Sierra 1500 SLT 6 Cyl 3.0L With 220 Amp Alternator
  • 2021 GMC Sierra 1500 SLE 6 Cyl 3.0L With 220 Amp Alternator
  • 2021 GMC Sierra 1500 AT4 6 Cyl 3.0L With 220 Amp Alternator
Product Details
Condition : RemanufacturedQuantity Sold : Sold individuallyWarranty : 1-year Quality-Built limited warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Series : OE Replacement SeriesRecommended Use : OE Replacement
Alternator, enginedesignationname : L84, Eng. VIN: D, 170 Amp Generator (KW7), 5.3L -
AC Delco®
Alternator, enginedesignationname : L84, Eng. VIN: D, 170 Amp Generator (KW7), 5.3L -
Part Number: AC13539726
Guaranteed to Fit
$169.49
Vehicle Fitment
  • 2021 GMC Sierra 1500 SLT 8 Cyl 6.2L enginedesignationname : L87, Eng. VIN: L, 170 Amp Generator (KW7)
  • 2021 GMC Sierra 1500 Denali 8 Cyl 6.2L enginedesignationname : L87, Eng. VIN: L, 170 Amp Generator (KW7)
  • 2021 GMC Sierra 1500 AT4 8 Cyl 5.3L enginedesignationname : L84, Eng. VIN: D, 170 Amp Generator (KW7)
  • 2021 GMC Sierra 1500 Base 8 Cyl 5.3L enginedesignationname : L82, Eng. VIN: F, 170 Amp Generator (KW7)
  • 2021 GMC Sierra 1500 Elevation 8 Cyl 5.3L enginedesignationname : L84, Eng. VIN: D, 170 Amp Generator (KW7)
  • 2021 GMC Sierra 1500 AT4 8 Cyl 6.2L enginedesignationname : L87, Eng. VIN: L, 170 Amp Generator (KW7)
  • 2021 GMC Sierra 1500 SLE 8 Cyl 5.3L enginedesignationname : L84, Eng. VIN: D, 170 Amp Generator (KW7)
  • 2021 GMC Sierra 1500 Denali 8 Cyl 5.3L enginedesignationname : L84, Eng. VIN: D, 170 Amp Generator (KW7)
  • 2021 GMC Sierra 1500 SLT 8 Cyl 5.3L enginedesignationname : L84, Eng. VIN: D, 170 Amp Generator (KW7)
  • 2021 GMC Sierra 1500 Base 6 Cyl 4.3L enginedesignationname : LV3, Eng. VIN: H, 170 Amp Generator (KW7)
Product Details
Quantity Sold : Sold individuallyWarranty : 24-months or unlimited mile AC Delco limited warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Recommended Use : OE ReplacementProduct Fit : Direct Fit
Universal, Performance Replacement DynaForce Series Alternator New
MSD®
Universal, Performance Replacement DynaForce Series Alternator New
Part Number: M465321
Universal Fit
$460.95
Product Details
Condition : NewAmperage Output : 120 AmpPulley Type : V-belt pulleyQuantity Sold : Sold individuallyWarranty : 1-year MSD limited warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Series : DynaForce SeriesRecommended Use : Performance ReplacementProduct Fit : Universal
Universal, Performance Replacement DynaForce Series Alternator New
MSD®
Universal, Performance Replacement DynaForce Series Alternator New
Part Number: M465361
Universal Fit
$482.95
Product Details
Condition : NewAmperage Output : 160 AmpPulley Type : V-belt pulleyQuantity Sold : Sold individuallyWarranty : 1-year MSD limited warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Series : DynaForce SeriesRecommended Use : Performance ReplacementProduct Fit : Universal
Universal, Performance Replacement DynaForce Series Alternator New
MSD®
Universal, Performance Replacement DynaForce Series Alternator New
Part Number: M465362
Universal Fit
$568.95
Product Details
Condition : NewAmperage Output : 160 AmpPulley Type : V-belt pulleyQuantity Sold : Sold individuallyWarranty : 1-year MSD limited warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Series : DynaForce SeriesRecommended Use : Performance ReplacementProduct Fit : Universal
Universal, Performance Replacement Alternator Series Alternator New
Holley®
Universal, Performance Replacement Alternator Series Alternator New
Part Number: H19197303
Universal Fit
$476.95
Product Details
Condition : NewQuantity Sold : Sold individuallyWarranty : 90-day Holley limited warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Specialty Part : Performance Part by JCWSeries : Alternator SeriesRecommended Use : Performance ReplacementProduct Fit : UniversalColor Finish : Black
Universal, Performance Replacement Alternator Series Alternator New
Holley®
Universal, Performance Replacement Alternator Series Alternator New
Part Number: H19197304
Universal Fit
$575.95
Product Details
Condition : NewQuantity Sold : Sold individuallyWarranty : 90-day Holley limited warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Specialty Part : Performance Part by JCWSeries : Alternator SeriesRecommended Use : Performance ReplacementProduct Fit : UniversalColor Finish : Polished
Performance Replacement Alternator, New
Holley®
Performance Replacement Alternator, New
Part Number: H1920380
Universal Fit
$391.95
Product Details
Condition : NewQuantity Sold : Sold individuallyWarranty : 90-day Holley limited warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Specialty Part : Performance Part by JCWRecommended Use : Performance ReplacementProduct Fit : Universal
Page 1 of 1 | Showing 1 - 12 of 12 results

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Helpful Automotive Resources

Common Car Problems You Shouldn’t Delay Fixing
Common Car Problems You Shouldn’t Delay FixingThe severity of these problems varies from part to part, but which common car troubles do you need to address immediately? There are issues that you must fix as soon as possible to continue driving safely and avoid permanently damaging your vehicle. Bad Alternator
Is an Alternator Rebuild Worth It?
Is an Alternator Rebuild Worth It?When it comes to dealing with a damaged alternator, there are generally three ways you can go about it: rebuild it, replace it, or get a remanufactured alternator. Alternator Rebuild
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Nissan Frontier Runs After Jump Starting Then DiesA car that runs after a jump start and then dies isn’t unheard of. A Nissan Frontier (or any vehicle) that immediately dies after jump-starting will most likely have a drained battery or a failing alternator. Failing Battery