GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

Schematic Reference: Radio/Navigation System Schematics

Connector End View Reference: Entertainment/Communication Connector End Views

1

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle

2

  1. Turn ON the ignition, with the engine OFF.
  2. Turn ON the radio.

Does the radio operate normally?

Go to Testing for Intermittent Conditions and Poor Connections

Go to Step 3

3

  1. Reprogram the Radio. Refer to Control Module References for replacement, setup, and programming.
  2. Turn OFF the ignition.
  3. Turn ON the ignition, with the engine OFF.
  4. Turn ON the radio.

Does the radio display CAL ERR?

Go to Step 4

Go to Step 5

4

Replace the radio. Refer to Control Module References for replacement, setup, and programming.

Did you complete the replacement?

Go to Step 5

--

5

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2