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Westin
$389.98
Victor Reinz
$10.19
Cometic Gasket
$53.75
aFe
$594.94
COMP Cams
$41.95
Roll-N-Lock
$2599.99
Dee Zee
$301.45
COMP Cams
$9.95
Magnaflow
$885.76
Nitrous Express
$1725.68
COMP Cams
$70.71
Undercover
$1999.99
Fabtech
$120.47
Dee Zee
$307.85
BackRack
$239.99
LIQUI MOLY
$75.30
Putco
$133.39
PowerStop
$392.70
Westin
$585.73
Spectre
$44.99
Find all the parts you need for common jobs on your 2018 GMC Sierra 3500 HD.
Yes, all parts displayed on this page are verified to fit the 2018 GMC Sierra 3500 HD using VCDB fitment data. Our fitment information comes directly from manufacturers and is cross-referenced with industry-standard vehicle databases.
The most popular categories for the 2018 GMC Sierra 3500 HD include exterior, engine, cold-air-intakes, and seat-covers. Browse our full selection to find the exact parts you need for your vehicle.
We carry parts from trusted brands including Wehrli, Go Rhino, Putco, Covercraft, and COMP Cams, 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.
