OER Parts offers a wide selection of Valve Covers for your 1980 GMC C1500. OER Parts offers 1980 GMC C1500 Aluminum Valve Covers, 1980 GMC C1500 Chrome Valve Cover, 1980 GMC C1500 Transparent Valve Covers, 1980 GMC C1500 Logo Valve Cover, 1980 GMC C1500 Finned Valve Covers, 1980 GMC C1500 OE Valve Covers, 1980 GMC C1500 Billet Aluminum Valve Covers, 1980 GMC C1500 Low Profile Valve Covers, and 1980 GMC C1500 Tall Profile Valve Covers.