For GMC C15 1973-1987. For Chevrolet C10 1973-1987. So you will need drop/lowering shocks. Part type: lowering kit. Rear Lowering Shocks 4"-7" Rear Drop For Chevy/GMC C10 C15 1973-1987. Front Lowering Shocks 2"-5" Drop For Chevy/GMC C10 C15 1973-1987.