38880-77E2-1 3888077E21  

GEO Tracker / Suzuki Swift  Automatic transmission Computer TCU TCM 

 Up for sale is a Working, in excellent condition Transmission control unit. This unit is from a 1997 automatic US model Sidekick 1.8 liter 4 cyl, May fit others too. This model car was also known as the Suzuki SidekickGeo / Chevy Trackerand may fit any of these.This comes with a 30 day functionality guarantee. In the unlikely event that it fails to function properly in the 30 days after you receive it, you can return it to us and we will send you a free replacement or refund.Check the part number on your original to be sure this is correct for your car. The part number must match for it to work correctly. A defective TCU can mimic the same symptoms of a defective transmission. Do not erroneously replace a transmission, you will still have the exact same problems if the TCU is what is defective. Changing this unit only takes about 20 minutes. Try this first!