
Factory diagram — Alternator
Factory diagrams
GMC
Alternator 145 Amp
UsedOEM
OEM GMC Alternator 145 Amp part #20989651
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Close match — verify with VIN before checkout. VIN check beats regret.
Estimated Dispatch
Ships in 24–48 hours
$401.90
Specifications
SKU
FTM-CHARM-20989651
OEM Part #
20989651
Shipping Class
ground
Warranty
—
