GM Service Manual Online
For 1990-2009 cars only

Liftgate Calibration Except Avalanche andEXT Escalade

Important: To ensure proper calibration of the liftgate, the liftgate assembly must be at room temperature during calibration.

Conditions

Use this procedure after replacing, repairing, or disassembling any portion of the power liftgate assembly.

Calibrate Liftgate

  1. Connect the Tech 2 to the vehicle.
  2. Select Special Functions in the Liftgate Module menu.
  3. Select LGM Open/Close Test.
  4. Follow the on screen instructions.