This part fits your vehicle! Based on the manufacturer’s specs, this product is an exact fit for your 1975-1978 GMC K25

1975-1978 GMC K25 - AC Delco Alternator

Part number: AC321-39
Manufacturer number: 321-39

AC Delco

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Availability: In stock


List Price: $114.42
Our Price: $96.97
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Product Description: AC DELCO ALTERNATOR, REMANUFACTURED -- 63 amps; A high quality, direct fit OE replacement alternator; With AC Delco's limited lifetime...Read More


Condition: Remanufactured

Fit note: Truck

  • Overview
  • Manufacturer info
  • Extended Warranty
AC DELCO ALTERNATOR, REMANUFACTURED -- 63 amps; A high quality, direct fit OE replacement alternator; With AC Delco's limited lifetime warranty.

This product fits the following GMC K25 submodels

  • 1975-1975: Base; 8 Cyl 5.7L; "GAS, CARB, VIN Y"
  • 1975-1975: Base; 8 Cyl 6.6L; "GAS, CARB, VIN M"
  • 1975-1975: High Sierra; 8 Cyl 5.7L; "GAS, CARB, VIN Y"
  • 1975-1975: High Sierra; 8 Cyl 6.6L; "GAS, CARB, VIN M"
  • 1975-1975: Sierra Classic; 8 Cyl 5.7L; "GAS, CARB, VIN Y"
  • 1975-1975: Sierra Classic; 8 Cyl 6.6L; "GAS, CARB, VIN M"
  • 1975-1975: Sierra Grande; 8 Cyl 5.7L; "GAS, CARB, VIN Y"
  • 1975-1975: Sierra Grande; 8 Cyl 6.6L; "GAS, CARB, VIN M"
  • 1975-1976: Base; 8 Cyl 5.7L; "GAS, CARB, VIN V"
  • 1975-1976: High Sierra; 8 Cyl 5.7L; "GAS, CARB, VIN V"
  • 1975-1976: Sierra Classic; 8 Cyl 5.7L; "GAS, CARB, VIN V"
  • 1975-1976: Sierra Grande; 8 Cyl 5.7L; "GAS, CARB, VIN V"
  • 1976-1976: Base; 8 Cyl 6.6L; "GAS, CARB, VIN U"
  • 1976-1976: Base; 8 Cyl 7.4L; "GAS, CARB, VIN Y"
  • 1976-1976: High Sierra; 8 Cyl 6.6L; "GAS, CARB, VIN U"
  • 1976-1976: High Sierra; 8 Cyl 7.4L; "GAS, CARB, VIN Y"
  • 1976-1976: Sierra Classic; 8 Cyl 6.6L; "GAS, CARB, VIN U"
  • 1976-1976: Sierra Classic; 8 Cyl 7.4L; "GAS, CARB, VIN Y"
  • 1976-1976: Sierra Grande; 8 Cyl 6.6L; "GAS, CARB, VIN U"
  • 1976-1976: Sierra Grande; 8 Cyl 7.4L; "GAS, CARB, VIN Y"
  • 1976-1978: Base; 8 Cyl 5.7L; "GAS, CARB, VIN L"
  • 1976-1978: High Sierra; 8 Cyl 5.7L; "GAS, CARB, VIN L"
  • 1976-1978: Sierra Classic; 8 Cyl 5.7L; "GAS, CARB, VIN L"
  • 1976-1978: Sierra Grande; 8 Cyl 5.7L; "GAS, CARB, VIN L"
  • 1977-1978: Base; 8 Cyl 6.6L; "GAS, CARB, VIN R"
  • 1977-1978: Base; 8 Cyl 7.4L; "GAS, CARB, VIN S"
  • 1977-1978: High Sierra; 8 Cyl 6.6L; "GAS, CARB, VIN R"
  • 1977-1978: High Sierra; 8 Cyl 7.4L; "GAS, CARB, VIN S"
  • 1977-1978: Sierra Classic; 8 Cyl 6.6L; "GAS, CARB, VIN R"
  • 1977-1978: Sierra Classic; 8 Cyl 7.4L; "GAS, CARB, VIN S"
  • 1977-1978: Sierra Grande; 8 Cyl 6.6L; "GAS, CARB, VIN R"
  • 1977-1978: Sierra Grande; 8 Cyl 7.4L; "GAS, CARB, VIN S"
  • 1978-1978: Base; 8 Cyl 5.0L; "GAS, CARB, VIN U"
  • 1978-1978: High Sierra; 8 Cyl 5.0L; "GAS, CARB, VIN U"
  • 1978-1978: Sierra Classic; 8 Cyl 5.0L; "GAS, CARB, VIN U"
  • 1978-1978: Sierra Grande; 8 Cyl 5.0L; "GAS, CARB, VIN U"