OER Parts offers a wide selection of Air Conditioning and Heater Parts for your 1986 GMC C2500 Suburban. OER Parts offers 1986 GMC C2500 Suburban Air Conditioning and Heater Control Panels, 1986 GMC C2500 Suburban Air Conditioning and Heater Knobs, 1986 GMC C2500 Suburban Air Conditioning and Heater Levers and Cables, 1986 GMC C2500 Suburban Air Conditioning and Heater Relays, 1986 GMC C2500 Suburban Air Conditioning and Heater Switches.