GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

  1. Turn the ignition OFF.
  2. Connect a scan tool.
  3. Turn the ignition to the ON position.
  4. Using the scan tool, check for any DTCs in the body control module (BCM).

Does the scan tool show any DTCs ?

--

Go to Diagnostic System Check - Body Control System in Body Control System

Go to Step 2

2

Remove and inspect the LR PRK fuse.

Is the fuse open?

--

Go to Step 3

Go to Step 4

3

  1. Locate and repair CKT 2509 (BRN) for a short to ground.
  2. Replace the fuse.

Is the repair complete?

--

System OK

--

4

  1. Inspect the tail lamp for open filament.
  2. Replace if needed.
  3. Ensure that connector C2 at the rear lamps bussing block is properly seated.

Was the problem found?

--

System OK

Go to Step 5

5

Connect a self powered test lamp from terminal G to ground.

Does the test lamp light?

--

Go to Step 7

Go to Step 6

6

Locate and repair CKT 1750 (BLK) for an open between the lamp and the rear lamps bussing block.

Is the repair complete?

--

System OK

--

7

Locate and repair the open 2509 (BRN) between fuse and lamp.

Is the repair complete?

--

System OK

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