GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you review the system operation and perform the necessary inspections?

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Go to Step 2

Go to Symptoms - Entertainment

2

  1. Turn the ignition to the RUN position.
  2. Turn on the radio.

Does the radio display illuminate and the speakers operate properly?

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

Go to Step 3

3

Connect a test lamp between the radio harness connector C1 terminal 6 and ground. Refer to Circuit Testing in Wiring Systems.

Does the test lamp illuminate?

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Go to Step 5

Go to Step 4

4

Repair the open in the supply voltage circuit of the display illumination. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

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Go to Step 6

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5

Replace the radio. Refer to Radio Replacement or Radio Replacement .

Did you complete the replacement?

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Go to Step 6

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6

Operate the system in order to verify the repair.

Did you correct the condition?

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System OK

Go to Step 3