Circuit Description
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2000 GMC Yukon XL, 2000 GMC Yukon, 2000 GMC Sierra, 2000 Chevrolet Tahoe, and 2000 Chevrolet Suburban. However, it is still accessible from the selected car via links, so may be relevant.
This DTC sets when ignition is active, Passlock(tm) signal is not open or grounded, correct key was used, but code does not equal learned key (Passlock(tm) sensor) code during engine start or for one second at any time during ignition cycle. System enters tamper mode. If ignition was off, vehicle will not start and SECURITY indicator light will flash. If vehicle was running, vehicle will restart, but SECURITY indicator light will remain illuminated. This DTC may be set if Passlock(tm) sensor was replaced and reprogramming procedure was not performed.