This listing is for a trailer brake control module (TBCM) that is programmed/flashed for your vehicle with the newest updates from GM using your VIN to match your vehicle. After you purchase the TBCM you will need to provide us with your VIN so we can program it before we ship it to you. The following part numbers are compatible 20850923 25854535 25788981 25907533

This part will fit these makes and models with these options
SIERRA 3500 PICKUP 07-09 Towing Control; (LH rear frame)
SIERRA 2500 PICKUP 07-09 Towing Control; (LH rear frame)
SILVERADO 2500 PICKUP 07-09 Towing Control; (LH rear frame)
SILVERADO 3500 PICKUP 07-09 Towing Control; (LH rear frame)
SILVERADO 1500 PICKUP 08-09 Towing Control; (LH rear frame)
SIERRA DENALI 08-09 Towing Control; (LH rear frame)
SIERRA 1500 PICKUP 08-09 Towing Control; (LH rear frame)