Automatic Transmission Compatibility
6L80E/6L90E
- 6 Speed Transmissions have a large spiral type connector on the right side of the transmission facing torwards the back of the vehicle
- All 6L80E & 6L90E transmissions MUST be 2013 and newer in order for Operating systems to communicate
8L80E/8L90E
- The 8 speed transmissions must be matched with an engine with the correct Fuel rail pressure sensor (Example: A 2015 Transmission must be ran with a 4 wire engine)
- The TUN Number on the right side of the transmission is used to determine this. The 3rd and 4th digits in the TUN number designate model year
- 2019+ 8 speed transmissions are currently not supported
10L90E
- The 10 Speed Transmissions were only ever optioned with Late model 3 wire fuel pressure sensors and require the newer style engine
- The TUN Number on the side of the transmission determines model year of the transmission same as the 8 speed
2019+ 10 speeds must have all mechanical detents for park, reverse, neutral, and drive.
If it is a fully electronic shifting transmission, it will only have detents for park, and drive, and these transmissions are not compatible.
4L60E/4L80E
- Since the GEN V LT engines were not originally optioned with a 4 Speed Automatic they require being ran on an aftermarket transmission controller.
PSI offers a plug and play 4L80E harness and computer for gen 5 LT engines.
