GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you review the system operation?

--

Go to Step 2

Go to Symptoms

2

Using a scan tool, establish communication with the CD player.

Does the CD player work remotely through the scan tool?

--

Go to Step 3

Go to Step 4

3

Inspect for a open in the E&C serial bus circuit, between the radio and the CD player. Refer to Circuit Testing and Wiring Repairs in Wiring Systems for service procedure.

Did you find and correct the condition?

--

Go to Step 8

Go to Step 6

4

Inspect the CD player B+ feed circuit for a open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems for service procedure.

Did you find and correct the condition?

--

Go to Step 8

Go to Step 5

5

Inspect the CD player ground circuit for a open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems for service procedure.

Did you find and correct the condition?

--

Go to Step 8

Go to Step 7

6

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

Did you complete the replacement?

--

Go to Step 8

--

7

Service the remote CD changer and replace if necessary

Did you complete the replacement?

--

Go to Step 8

--

8

Operate the system in order to verify the repair.

Did you correct the condition?

--

System OK

Go to Step 2