GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

1

Did you perform the Diagnostic System Check - Lighting Systems?

Go to Step 2

Go to Diagnostic System Check - Lighting Systems

2

  1. Block the wheels or set the parking brake.
  2. Turn the ignition switch to the ON position. Do not start the engine.
  3. Disconnect the backup lamp switch (M/T) or the park/neutral position switch (A/T).

Do the backup lamps turn OFF?

Go to Step 3

Go to Step 4

3

Replace or adjust the backup lamp switch (M/T) or the park/neutral position switch (A/T). Refer to Backup Lamp Switch Replacement in Steering Wheel and Column.

Is the repair complete?

System OK

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4

Repair the short to power in the Back up lamp feed Circuit. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

System OK

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