GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Was the entire Interior Lights Dimming System Check performed?

--

Go to Step 2

Go to Interior Lights Dimming System Check

2

Do the incandescent lamps operate properly?

--

Go to Step 3

Go to Incandescent Lamps Inoperative

3

Are the VF displays inoperative for all of the following (if equipped)?

    • Radio
    • Instrument cluster (IPC)
    • Heater and A/C control head
    • Cellular telephone

--

Go to Step 8

Go to Step 4

4

Is the VF display inoperative for only the radio?

--

Go to Diagnostic System Check - Radio/Audio System in Entertainment

Go to Step 5

5

Is the VF display inoperative for only the instrument cluster (IPC)?

--

Go to Diagnostic System Check - Instrument Cluster in Instrument Panel, Gauges and Console

Go to Step 6

6

Is the VF display inoperative for only the heater and A/C control head?

--

Go to Diagnostic System Check in HVAC

Go to Step 7

7

Is the VF display inoperative for only the cellular telephone (if equipped)?

--

Go to Cellular Telephone System Check in Cellular Communications

Go to Step 8

8

Replace the instrument panel integration module (IPM). Refer to Body Control Module Replacement in Body Control System.

Is the IPM replacement complete?

--

Go to Interior Lights Dimming System Check

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