GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Were you sent here from the Interior Lights Diagnostic Systems Check?

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Go to Step 2

Go to Interior Lamps System Check

2

Using a test lamp, backprobe the sunroof switch assembly cavity 1 to ground.

Does the test lamp illuminate?

--

Go to Step 3

Go to Step 4

3

Replace the sunroof switch assembly. Refer to Sunroof Switch Replacement in Roof.

Is the replacement complete?

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Go to Interior Lamps System Check

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4

Repair the open in the BLU/YEL wire between S300 and the sunroof switch assembly. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Interior Lamps System Check

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