GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Was the entire backup lights system check performed?

--

Go to Step 2

Go to Backup Lamp System Check

2

Inspect to determine if the vehicle is equipped with manual or automatic transmission.

Is the vehicle equipped with manual transmission?

--

Go to Step 3

Go to Step 4

3

Disconnect the backup lamp switch.

Are the backup lamps on?

--

Go to Step 5

Go to Step 6

4

Disconnect the park/neutral position switch.

Are the backup lamps on?

--

Go to Step 5

Go to Step 7

5

Repair the short to B+ in circuit 24.

Is the repair complete?

--

Go to Step 8

--

6

Replace the backup lamp switch. Refer to Backup Lamp Switch Replacement Backup Lamp Switch Replacement

Is the repair complete?

--

Go to Step 8

--

7

Adjust or replace the park/neutral position switch. Refer to Park/Neutral Position Switch Replacement

Is the repair complete?

--

Go to Step 8

--

8

  1. Turn the ignition swich to the OFF position.
  2. Reconnect all connectors/components removed.

Have all repairs been made?

--

Go to Backup Lamp System Check

--