GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you perform the Backup Lights System Check?

--

Go to Step 2

Go to Backup Lamp System Check

2

Is the left backup lamp the only inoperative component?

--

Go to Step 4

Go to Step 3

3

Is the right backup lamp the only inoperative component?

--

Go to Step 5

--

4

Test for an open in the RED wire between S418 and the left rear combination lamp.

Is there an open?

--

Go to Step 6

Go to Step 7

5

Test for an open in the RED wire between S418 and the right rear combination lamp.

Is there an open?

--

Go to Step 6

Go to Step 8

6

Repair the open. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Backup Lamp System Check

--

7

Repair the open in the BLK wire between the left rear combination lamp and G300. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Backup Lamp System Check

--

8

Repair the open in the BLK wire between the right rear combination lamp and G300. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Backup Lamp System Check

--