GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

1

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle

2

With the keyless entry transmitter, attempt to operate the panic function.

Do the horns pulse and the headlamps and the park lamps turn on?

Go to Testing for Intermittent Conditions and Poor Connections

Go to Step 3

3

Do any of the panic functions operate?

Go to Step 4

Go to Keyless Entry System Inoperative

4

Do the horns pulse on and off?

Go to Diagnostic System Check - Vehicle

Go to Diagnostic System Check - Vehicle