GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

  1. Turn the ignition switch on.
  2. Press and hold the power door unlock switch.
  3. Within 20 seconds of pressing the unlock switch, cycle the headlamps on and off 6 times.
  4. Release the power door lock switch.
  5. Refer to Diagnostic Information and Procedures.

Is history code 1 set?

--

Go to Fasten Safety Belt Indicator/Chime Inoperative in Instrument Panel, Gauges and Console

Go to Step  2

2

Refer to Diagnostic Information and Procedures.

Is history code 2 set?

--

Go to Courtesy Lamps Always On in Lighting Systems

Go to Step 3

3

Refer to diagnostic information and procedures.

Is history code 3 set?

--

Go to Courtesy Lamps Inoperative in Lighting Systems

System OK