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Choose your trim in My Garage to confirm exact fit.
Exact-fit parts for the 2018 GMC Sierra 2500 HD SLT.
Dorman
Part # 54218
$18.99
Dorman
Part # 620-993
$107.14
Dorman
Part # 621-111
$106.43
Wehrli
Part # WCF100188-RED
$219.90
Vernet
Part # TH2107.82J
$21.58
Four Seasons
Part # 37858
$21.09
Motorad
Part # 5945KT
$46.50
GMB
Part # 130-9670
$137.59
Dorman
Part # 626-591
$51.70
Wehrli
Part # WCF100742-GB
$174.08
Elring
Part # 868.630
$8.93
Delphi
Part # TS10076
$23.96
BD Diesel
Part # 1061532
$102.73
Elring
Part # 792.640
$9.05
Dorman
Part # 620-996
$116.84
Motorad
Part # 2523-160
$20.81
Fel-Pro
Part # 35635
$3.12
Wehrli
Part # WCF100742-BB
$174.08
Spectra Premium
Part # 7-4739
$147.67
URO Parts
Part # GM1316397
$10.55
This page groups parts listed for the 2018 GMC Sierra 2500 HD SLT. 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 2018 GMC Sierra 2500 HD SLT. 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 Wehrli, Dorman, Motorad, Four Seasons, and Mishimoto, 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.
