Dorman Automatic Belt Tensioner, 419-400
In stock
$108.99
Listed as compatible with this vehicle by the retailer feed.
Check price2003 GMC Sierra 3500 Belts
49 products listed for this model year in the retailer catalog. Check engine and trim details before ordering.
Back to 2003 GMC Sierra 3500 parts
This site contains affiliate links. We may earn a commission if you buy through them. We do not sell these products or guarantee merchant inventory. Compatibility is listed by the retailer feed for this vehicle; it is not an OEM confirmation. Catalog snapshot: Aug 15, 2026.