Vehicle Speed Sensor (4L80-E - Input): Removal
WARNING: This page does not describe the selected car, but rather 13 other vehicles, including the 2002 GMC Yukon XL, 2002 GMC Yukon, 2002 GMC Sierra, 2002 GMC Cab & Chassis Sierra, and 2002 GMC C3500 HD. However, it is still accessible from the selected car via links, so may be relevant.
Raise the vehicle. Disconnect the input speed sensor (1) electrical connector. Remove the input speed sensor bolt. Remove the input speed sensor (1) and the bracket assembly from the case. See Figure. Inspect the vehicle speed sensor assembly (1) for any evidence of damage.