Carquest Alternator: Remanufactured, 170 Amps, 11815A
In stock
$369.99
Listed as compatible with this vehicle by the retailer feed.
Check price2021 GMC Sierra 1500 Alternators
4 products listed as compatible with this vehicle by the retailer feed.
Carquest Alternator: Remanufactured, 220 Amps, 10379A
In stock
$428.99
Listed as compatible with this vehicle by the retailer feed.
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Carquest Alternator: Remanufactured, 220 Amps, 11818A
In stock
$511.99
Listed as compatible with this vehicle by the retailer feed.
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Carquest Alternator: Remanufactured, 250 Amps, 10440A
In stock
$558.99
Listed as compatible with this vehicle by the retailer feed.
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This site contains affiliate links. We may earn a commission if you buy through them. We do not sell these products or guarantee merchant inventory. Compatibility is listed by the retailer feed for this vehicle; it is not an OEM confirmation. Catalog snapshot: Aug 15, 2026.