GM Service Manual Online
For 1990-2009 cars only

Step

Action

Normal Result(s)

Abnormal Result(s)*

1

  1. Turn the ignition switch to ON.
  2. Place the gear selector lever in PARK.

The backup lamps are off.

Backup Lamps Are Always On

2

Place the gear selector lever in REVERSE.

The backup lamps turn on.

3

Place the gear selector lever in NEUTRAL.

The backup lamps turn off.

Backup Lamps Are Always On

* Refer to the appropriate symptom diagnostic table for the applicable abnormal result.