GM Service Manual Online
For 1990-2009 cars only

ESCM Replacement

If the electronic suspension control module (ESCM) is replaced, the procedures must be perform in the following order:

  1. The ESCM programming, refer to Service Programming System (SPS) .
  2. The bumpstop setup procedure. To perform this procedure, lift the vehicle just off the ground to fully extend the suspension. Connect the scan tool to the vehicle, turn ignition ON with the engine OFF, and follow the on screen instructions in ESC Special Functions.
  3. Important: The vehicle must be at correct trim height and on a level surface before performing trimset procedure. Refer to Trim Height Inspection .

  4. The trimset procedure. Connect the scan tool to the vehicle, turn ignition ON with the engine OFF, and follow the on screen instruction in the ESC Special functions.

ESCM Programming

If the ESCM is reprogrammed, the procedures must be performed in the following order:

  1. The ESCM reprogramming, refer to Service Programming System (SPS) .
  2. The bumpstop setup procedure. To perform this procedure, lift the vehicle just off the ground to fully extend the suspension. Connect the scan tool to the vehicle, turn ignition ON with the engine OFF, and follow the on screen instructions in ESC Special Functions.
  3. Important: The vehicle must be at correct trim height and on a level surface before performing trimset procedure. Refer to Trim Height Inspection .

  4. The trimset procedure. Connect the scan tool to the vehicle, turn ignition ON with the engine OFF, and follow the on screen instruction in the ESC Special functions.

Suspension Position Sensor Replacement

If a position sensor is replaced, the procedures must be performed in the following order:

  1. The bumpstop setup procedure. To perform this procedure, lift the vehicle just off the ground to fully extend the suspension. Connect the scan tool to the vehicle, turn ignition ON with the engine OFF, and follow the on screen instructions in ESC Special Functions.
  2. Important: The vehicle must be at correct trim height and on a level surface before performing trimset procedure. Refer to Trim Height Inspection .

  3. The trimset procedure. Connect the scan tool to the vehicle, turn ignition ON with the engine OFF, and follow the on screen instruction in the ESC Special functions.