GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you review the radio/audio system operation and perform the necessary inspections?

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Go to Step 2

Go to Symptoms

2

Verify that the radio display and/or buttons do not illuminate.

Do the radio display and buttons illuminate normally?

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

Go to Step 3

3

Test CKT 1382 (PPL/WHT) at the radio for voltage.

Is battery voltage present?

9-16 V

Go to Step 6

Go to Step 4

4

Test CKT 1382 (PPL/WHT) for an open.

Is there an open in CKT 1382 (PPL/WHT)?

--

Go to Step 5

Go to Step 7

5

Repair the open in CKT 1382 (PPL/WHT). Refer to Circuit Testing and Wiring Repairs in Wiring Repairs.

Is the repair complete?

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Go to Step 8

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6

Service the radio. Refer to Radio Replacement .

Is service of the radio complete?

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Go to Step 8

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7

Replace the body control module (BCM). Refer to Body Control Module Replacement .

Is the replacement complete?

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Go to Step 8

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8

Operate the system in order to verify the repair.

Did you correct the condition?

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System OK

Go to Step 3