Please Note:Compatibility is just for reference only.Please confirm your OE number. The best way to checompatibility is to chethe Part Number (OE#) on your old unit if poible.If you do not know the OE#, contact your main dealers for the required part number, or provide us the VIN of your car.OE number:15003858, 15712144, 577-824Compatible with the following vehicles:Chevrolet90-93 C1500 454 S4-97 C1500 Base99 C1500 L8-92 C1500 Scottsdale90-98 C1500 WT88-98 C1500 (submodel: Cheyenne, Silverado)94-97, 99-2000 C2500 Base99-2000 C2500 L8-92 C2500 Scottsdale94-95, 98 C2500 WT88-98 C2500 (submodel: Cheyenne, Silverado)94-97, 99-2000 C3500 Base99-2000 C3500 L8-92 C3500 Scottsdale88-98 C3500 (submodel: Cheyenne, Silverado)94-97 K1500 Base99 K1500 L8-92 K1500 Scottsdale91 K1500 Sport90-98 K1500 WT88-98 K1500 (submodel: Cheyenne, Silverado)94-97, 99-2000 K2500 Base99-2000 K2500 L8-92 K2500 Scottsdale94-95, 98 K2500 WT88-98 K2500 (submodel: Cheyenne, Silverado)94-97, 99-2000 K3500 Base99-2000 K3500 L8-92 K3500 Scottsdale88-98 K3500 (submodel: Cheyenne, Silverado)GMC97 C1500 Sierra GT88-99 C1500 Sierra SLE94-98 C1500 Sierra Special88-93 C1500 (submodel: Sierra, Sierra SLX)94-99 C1500 (submodel: Sierra SL, Sierra SLT)88-2000 C2500 Sierra SLE88-93 C2500 (submodel: Sierra, Sierra SLX)94-2000 C2500 (submodel: Sierra SL, Sierra SLT)88-2000 C3500 Sierra SLE88-93 C3500 (submodel: Sierra, Sierra SLX)94-2000 C3500 (submodel: Sierra SL, Sierra SLT)88-99 K1500 Sierra SLE95 K1500 Sierra SL4-98 K1500 Sierra Special93 K1500 Sierra Sport88-93 K1500 (submodel: Sierra, Sierra SLX)94-99 K1500 (submodel: Sierra SL, Sierra SLT)88-2000 K2500 Sierra SLE88-93 K2500 (submodel: Sierra, Sierra SLX)94-2000 K2500 (submodel: Sierra SL, Sierra SLT)88-2000 K3500 Sierra SLE88-93 K3500 (submodel: Sierra, Sierra SLX)