GM Service Manual Online
For 1990-2009 cars only

Step

Action

Normal Result(s)

Abnormal Result(s)*

1

  1. Apply the park brake.
  2. Turn the ignition switch to the RUN position.
  3. Shift the transaxle into the REVERSE position.

The backup lamps turn ON.

Backup Lamps Inoperative

Backup Lamp Inoperative - One Lamp

2

Shift the transaxle into PARK or NEUTRAL.

The backup lamps are OFF.

Backup Lamps Always On

* Refer to appropriate Symptom Diagnosis for the applicable results.