WelcomeCustomer Here is the process for relearning the security system. Chances are good you need to replace the passlock sensor, which is part of the ignition cylinder housing. Please ask if you need more information. Thanks.
30 Minute Re-Learn Procedure
Important: The vehicle learns the PasslockTM Sensor Data Code and/or password XXXXX the next ignition switch transition from OFF to CRANK. You must turn the ignition OFF before attempting to start the vehicle.
My 2000 GMC Yukon Security light won't go off and will not let me start the car. Also, my keyless entry remote will not work.
Optional Information: 2000 Yukon SLT Vortec 5300 V8 Already Tried: The security light will not go off and the keyless transmitter will not work. Also, the car will not start. How do I reset the security system to get the car started or how do I override the security to get the car started?
Also, can anyone call me at XXX-XXX-XXXX cell. I am stuck with the truck not working.