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Choose your trim in My Garage to confirm exact fit.
Exact-fit parts for the 1981 Chevrolet K20 Custom.
Yukon Gear & Axle
Part # OK 3-QRT-CONV
$39.89
Hayden
Part # 153
$21.06
Hayden
Part # 698
$76.44
Bosch
Part # 3510
$9.14
Standard Motor Products
Part # S-1634
$15.90
Rostra
Part # 50-1218
$26.68
Dorman
Part # 090-061CD
$6.41
GPD
Part # 1815250
$19.03
Hayden
Part # 214
$55.85
Sealed Power
Part # 224-4146
$48.40
Reinz
Part # 71-14038-00
$5.68
Yukon Gear & Axle
Part # OK 4-QRT
$134.89
Yukon Gear & Axle
Part # OK 4-QRT-A
$136.89
Yukon Gear & Axle
Part # OK 3-QRT-CONV-A
$49.89
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This page groups parts listed for the 1981 Chevrolet K20 Custom. Some products fit every trim, while others depend on submodel, engine, drivetrain, or brake package. Use your trim in My Garage or the product page fitment check to confirm exact fit.
We offer a wide selection of oil & fluids parts for the 1981 Chevrolet K20 Custom. This page narrows the catalog to the year, make, and model; use your trim on product pages to confirm exact fit when a part only fits certain submodels.
We carry parts from trusted brands including Dorman, Four Seasons, Hayden, Sealed Power, and Standard Motor Products, plus many more. Filter by brand to find your preferred manufacturer.
Most in-stock items ship within 1-2 business days. Shipping rates are calculated at checkout based on your location.
Warranty coverage varies by manufacturer but typically ranges from 1 year to lifetime. Each product page includes specific warranty information from the manufacturer.
