GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2003 🢒 Envoy - 4WD 🢒 Body and Accessories 🢒 Theft Deterrent 🢒 Lights Inoperative in Content Theft Deterrent (CTD) Alarm Mode

Step

Action

Yes

No

Schematic Reference: Theft Deterrent System Schematics

Connector End View Reference: Theft Deterrent System Connector End Views

DEFINITION: The vehicle lights do not flash when the CTD system is in alarm mode.

1

Did you perform A Diagnostic System Check - Theft Deterrent?

Go to Step 2

Go to Diagnostic System Check - Theft Deterrent

2

Perform one of the following to activate the CTD alarm mode:

    • Operate the PANIC button on the keyless entry transmitter.
    • Complete the following steps:
        1. Open the driver's window.
        2. Lock the vehicle using the power door lock switch.
        3. Wait for the SECURITY telltale to turn off.
        4. Reach in and unlock the driver's door.
        5. Open the driver's door.

Do all of the alarm mode functions activate (lights flash and horn pulses)?

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

Go to Step 3

3

Are only the parking lamps inoperative?

Go to Park Lamps Inoperative in Lighting Systems

Go to Content Theft Deterrent (CTD) Alarm Mode Inoperative