GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you perform the Exterior Lights System Check?

--

Go to Step 2

Go to Exterior Lights System Check

2

Inspect the FR PRK fuse in the UBEC.

Is the fuse open?

--

Go to Step 5

Go to Step 3

3

  1. Remove both of the park lamp bulbs.
  2. Inspect the bulbs for open or shorted filaments.

Does either bulb have an open or shorted filament?

--

Go to Step 4

Go to Step 6

4

Replace the defective bulb.

Is the repair complete?

--

Go to Exterior Lights System Check

--

5

Locate and repair the short to ground in CKT 2309 (BRN).

Is the repair complete?

--

Go to Exterior Lights System Check

--

6

Locate and repair the open in CKT 2309 (BRN).

Is the repair complete?

--

Go to Exterior Lights System Check

--