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Flashing when I open the door.
Security light goes out when ignition key is set to first position, then the battery picture comes up.
Happened all of a sudden. I had dropped my keys on concrete.
No aftermarket alarms or remote start.
ok, I suspect a bad ignition lock pass key sensor. I need you to try this. this will take 30 minutes, i recommend a battery charger if you have one. if the battery gets low this relearn wont work correctly. try this and let me know what happens.
Important: The vehicle learns the Passlock 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.
I am going to try this now
I wrote down the instructions, and followed them.
My engine light stays on?
With no key in the ignition and door open, Security light is flashing. Close door and Security light is off.
With key in the ignition in the on position, battery and engine light up.
My 2002 GMC, is it ODB ll compliant?
Looks like I can pick one up that would look for the problem and reset the engine light.
Hello Hello, Now I have a fancy $200 code reader that can reset a fault. Found no faults to reset.
What I did do is followed the steps you had laid out to reset "security", that did not work. I decided to leave out step 2 (attempt to start engine). The first time I did that,
yo0hooooooo my truck started.
I remembered a friend of mine who had the same problem around 6 months ago. When I read him your instructions, He said forget step 2.
And yes my truck starts every time. As I had mentioned earlier, No faults were read by the code reader.
Great!! Good news indeed. hopefully you wont have any more problems!!!