OER Parts offers a wide selection of Bumpers for your 1988 GMC R1500 Suburban. OER Parts offers 1988 GMC R1500 Suburban Fiberglass Bumpers, 1988 GMC R1500 Suburban Front Bumpers, 1988 GMC R1500 Suburban Front Bumper Covers 1988 GMC R1500 Suburban Rear Bumpers, and 1988 GMC R1500 Suburban Rear Bumper Covers.