GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you perform the Interior Lights Dimming System Check?

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Go to Step 2

Go to Interior Lights Dimming System Check

2

  1. Turn the headlamp switch to the PARK position.
  2. Turn the instrument panel (IP) lamp dimmer switch to the OFF position.
  3. Using a test light, backprobe the inoperable component between circuit 230 to ground.

Does the test light illuminate?

--

Go to Step 4

Go to Step 3

3

Repair the poor connection or an open in circuit 230.

Has the repair been made?

--

Go to Interior Lights Dimming System Check

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4

Replace the bulb or the inoperable component.

Has the repair been made?

--

Go to Interior Lights Dimming System Check

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