GM Service Manual Online
For 1990-2009 cars only

Important: The following steps must be completed before using the symptom tables.

  1. Determine whether the vehicle is equipped with an electrically assisted or active suspension system. Perform electrical diagnosis prior to beginning mechanical diagnosis.
  2. Review the system description and operation in order to familiarize yourself with the system functions. Refer to the appropriate description and operation:
  3. •  General Description for the front suspension
    •  General Description for the rear suspension
    •  General Description for tires and wheels

Visual/Physical Inspection

    â€¢ Inspect for aftermarket devices which could affect the operation of any of the suspension subsystems.
    â€¢ Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.
    â€¢ Inspect for proper tire size and inflation pressure. Refer to Vehicle Certification Label .

Symptom List

Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom:

    â€¢  Vehicle Leads/Pulls
    â€¢  Body Leans or Sways in Corners
    â€¢  Suspension Bottoms
    â€¢  Noise Diagnosis - Front Suspension
    â€¢  Noise Diagnosis - Rear Suspension
    â€¢  Suspension Strut and Shock Absorber Testing - On Vehicle
    â€¢  Wheel Bearings Diagnosis
    â€¢  Trim Height Inspection