OER Parts offers a wide selection of Bumpers for your 1984 GMC C1500. OER Parts offers 1984 GMC C1500 Fiberglass Bumpers, 1984 GMC C1500 Front Bumpers, 1984 GMC C1500 Front Bumper Covers 1984 GMC C1500 Rear Bumpers, and 1984 GMC C1500 Rear Bumper Covers.