GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you perform the Radio/Audio System Check?

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Go to Step 2

Go to Diagnostic System Check - Radio/Audio System

2

  1. Turn the headlamp switch to the ON position.
  2. With a test light, backprobe between the radio harness connector terminal F4 to ground.

Does the test light illuminate?

--

Go to Step 4

Go to Step 3

3

Repair a poor connection or open in circuit 8.

Is the repair complete?

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Go to Step 4

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4

Replace the radio. Refer to Radio Replacement for service procedure.

Is the repair complete?

--

Go to Diagnostic System Check - Radio/Audio System

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