GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

  1. Verify that the Theftlock® is not active.
  2. Inspect the radio for correct operation.

Does the radio turn ON and OFF?

--

Go to Step 2

Go to Step 3

2

  1. Turn the ignition to the OFF position.
  2. Remove the J7-J8 fuse and the E1-E2 fuse for one minute, then reinstall the fuses.
  3. Turn the ignition to the RUN position.
  4. Turn the radio ON.

Does the radio display LOC?

--

Go to Step 3

System OK

3

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

Is the repair complete?

--

Go to Step 4

--

4

Operate the system in order to verify the repair.

Did you correct the condition?

--

System OK

Go to Step 2