GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

1

Did you review the Radio/Audio System Operation and perform the necessary inspections?

Go To Step 2

Go to Symptoms - Entertainment

2

Verify that the radio has no sound and no display.

Does the radio operate normally?

Go to Testing for Intermittent Conditions and Poor Connections

Go to Step 3

3

  1. Disconnect the radio connector. Refer to Radio Replacement for access.
  2. Turn the ignition switch to the ON position, with the engine OFF.
  3. Connect a test light between cavity 4 and a good ground.

Does the test light illuminate?

Go to Step 4

Go to Step 7

4

Test for an open condition between cavity 9 of the radio connector and ground.

Is there continuity in the BLK wire?

Go to Step 5

Go to Step 8

5

connect a test light between cavity 11 of the radio connector and ground.

Does the test light illuminate?

Go to Step 9

Go to Step 6

6

Repair the open in the WHT wire of the memory/radio supply voltage circuit. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 10

--

7

Repair the open in the WHT/BLK wire of the radio supply voltage circuit. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 10

--

8

Repair the open condition in the BLK wire of the radio ground circuit. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 10

 

9

Replace the radio. Refer to Radio Replacement .

Did you complete the replacement?

Go to Step 10

10

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 3