This Transmission Control Module (TCM) is a genuine replacement for all 2007 Chevrolet Trailblazer SS models with the engine and 4L70E transmission. The GM part number for this ECU is 12636660 and the hardware code is 12636660. Enthusiasts commonly refer to this module as a T42 Transmission Control Module (TCM).
Once we receive your order, we will pull a used, but inspected and tested, ECU from our inventory and program it with the latest GM calibration for a 2007 Chevrolet Trailblazer SS with the engine and 4L70E transmission. IMPORTANT! If this ECU will be installed in a 2007 Chevrolet Trailblazer SS, you must provide us with your Vehicle Identification Number (VIN) for compatibility. You may provide a VIN during checkout as a note on the order or by email immediately following your purchase.