GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 1999 🢒 Century (China) (CNG) 🢒 Transmission/Transaxle 🢒 Automatic Transaxle - 4T65-E 🢒 Backup Lamp System Check

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.

Backup lamps turn ON.
    • Backup lamps are inoperative. Refer to Backup Lamps Inoperative
    • One Backup lamp inoperative. Refer to Backup Lamp Inoperative - One Lamp

2

Shift the transaxle into the PARK or the NEUTRAL position.

The backup lamps are OFF.

Backup lamps always ON. Refer to Backup Lamps Always On

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