OER Parts offers a wide selection of Dress Up Kits for your 2004 GMC Truck. OER Parts offers 2004 GMC Truck Valve Covers, 2004 GMC Truck Exhaust Manifolds, 2004 GMC Truck Intake Manifolds, 2004 GMC Truck Timing Covers, 2004 GMC Truck Water Pumps, 2004 GMC Truck Oil Pans, 2004 GMC Truck Custom Under Hood Mirrors, 2004 GMC Truck Radiator Support Show Panel, and more...