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?

--

Go to Step 2

Go to Interior Lights Dimming System Check

2

Inspect for an open or short to ground in CKT 724 (PPL/WHT) between the radio and S267. Refer to Testing for Continuity or Testing for Short to Ground in Wiring Systems.

Is CKT 724 OK?

--

Go to Step 3

Go to Step 4

3

Replace the radio. Refer to Radio Replacement in Entertainment.

Is the repair complete?

--

Go to Interior Lights Dimming System Check

--

4

Repair the suspect wiring. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Interior Lights Dimming System Check

--