OER Parts offers a wide selection of Dress Up Kits for your 1999 GMC C1500. OER Parts offers 1999 GMC C1500 Valve Covers, 1999 GMC C1500 Exhaust Manifolds, 1999 GMC C1500 Intake Manifolds, 1999 GMC C1500 Timing Covers, 1999 GMC C1500 Water Pumps, 1999 GMC C1500 Oil Pans, 1999 GMC C1500 Custom Under Hood Mirrors, 1999 GMC C1500 Radiator Support Show Panel, and more...