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Choose your trim in My Garage to confirm exact fit.
Exact-fit parts for the 1991 GMC K1500 Sierra SLX.
Fel-Pro
Part # 35062
$1.29
Fel-Pro
Part # 35357
$1.77
Edelbrock
Part # 8892
$507.51
Motorad
Part # MT300
$138.53
Four Seasons
Part # 73055
$57.43
Vernet
Part # TH1378.70
$8.06
Edelbrock
Part # 8603
$24.95
Dayco
Part # 71421
$18.56
Dorman
Part # 626-569
$61.32
GMB
Part # 130-1830
$65.31
Gates
Part # 33006S
$16.68
Four Seasons
Part # 98553
$39.80
Skyward Automotive
Part # SK1301620
$48.58
Fel-Pro
Part # 36180
$4.51
Gates
Part # 33637
$0.51
Motorad
Part # 200-180
$9.92
Gates
Part # 33008S
$11.89
Motorad
Part # 200-160
$9.92
Vernet
Part # THF1378.82
$9.10
Gates
Part # 31518
$9.77
This page groups parts listed for the 1991 GMC K1500 Sierra SLX. 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 cooling system parts for the 1991 GMC K1500 Sierra SLX. 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 Gates, Motorad, Four Seasons, Dorman, 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.
