GM Service Manual Online
For 1990-2009 cars only

Important: Review the system description in order to familiarize yourself with the system functions. Refer to one of the following descriptions:

   •  Lumbar Switch Replacement
   •  Power Seats System Description and Operation

Visual/Physical Inspection

    • Inspect for aftermarket devices which could affect the operation of the power seat system. Refer to Checking Aftermarket Accessories .
    • Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.
    • Inspect the power seat for proper mechanical operation.

Intermittent

Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections .

Symptom List

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

    •  Lumbar Support Inoperative
    •  Power Seat Inoperative