GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Review the interior lamps operation and perform the necessary inspections.

Did you complete the system review and inspection?

--

Go to Step 2

Go to Symptoms

2

Attempt to operate the interior lamps dimming.

Does the system operate normally?

--

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

Go to Step 3

3

Replace the headlamp switch.

Did you complete the repair?

--

Go to Step 4

--

4

Operate the system in order to verify the repair.

Did you correct the condition?

--

System OK

Go to Step 3