Lights Inoperative in Content Theft Deterrent (CTD) Alarm Mode

WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Step	Action	Yes	No
Schematic Reference: Theft Deterrent System Schematics Connector End View Reference: Theft Deterrent System Connector End Views
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: Open the driver's window. Lock the vehicle using the power door lock switch. Wait for the SECURITY telltale to turn off. Reach in and unlock the driver's door. 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 Turn Signal Lamps and/or Indicators Inoperative in Lighting Systems	Go to Content Theft Deterrent (CTD) Alarm Mode Inoperative