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Choose your trim in My Garage to confirm exact fit.
Exact-fit parts for the 2021 GMC Sierra 2500 HD SLT.
GEN-Y Hitch
Part # GH-25001
$699.95
Dee Zee
Part # DZ95002
$45.99
Cognito
Part # 110-91295
$143.31
Westin
Part # 21-534770
$1281.99
Dee Zee
Part # DZ16611
$256.49
Pace Edwards
Part # KECA34A65
$3023.51
Westin
Part # 22-5020
$399.16
Thule
Part # 37002XT
$977.40
Truxedo
Part # 1705211
$165.99
N-Fab
Part # C1980CC
$314.87
Westin
Part # 28-71250
$722.18
Dee Zee
Part # DZ6211S
$75.67
N-Fab
Part # NBC19CC-TX
$704.38
Westin
Part # 56-14125
$654.99
Putco
Part # 529005
$84.99
Dee Zee
Part # DZ16411
$329.56
WeatherTech
Part # 120122
$138.95
Westin
Part # 56-5347752
$1310.99
LUND
Part # 23488964
$209.13
Westin
Part # 56-534765
$1028.99
This page groups parts listed for the 2021 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 exterior accessories parts for the 2021 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 Go Rhino, Westin, Dee Zee, Access, and Putco, 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.
