- 4L60-E: This is a four-speed automatic transmission that was used in many GM vehicles during the 1990s and 2000s. It is a longitudinally mounted transmission with a rear-wheel drive configuration.
- 4L65-E: This is a four-speed automatic transmission that was introduced for the 1999 model year. It is an updated version of the 4L60-E transmission and features several improvements, including stronger internals, a revised valve body, and a higher torque capacity.
