If security light on and blinking as you try to start and not allowing the engine to crank and run
try to reprogram and lean the key
if have to keep on doing it then have to have it scanned for codes
need to use a scanner tool for codes an OBDII reader will not get you the correct codes that you need to security system
scan BCM, IPC and PCM for codes most shops charges about $65 for the service
30 Minute Learn Procedure
Turn ignition switch to RUN position, engine OFF.
Attempt to start the engine, then release the key to RUN position (vehicle will not start).
Observe the SECURITY telltale, after approximately 10 minutes the telltale will turn OFF.
Turn ignition switch to OFF position, and wait 5 seconds.
Repeat steps 1-4 two more times for a total of 3 cycles/30 minutes (the vehicle is now ready to relearn the password on the next ignition switch transition from OFF to CRANK position).
NOTE:The vehicle learns the password on the next ignition switch transition from OFF to CRANK. You must turn the ignition switch to OFF position before attempting to start the vehicle.
Start the engine (the vehicle has now learned the password).
Using a scan tool, clear any DTCs if needed (history DTCs will self clear after 100 ignition cycles).
Saturday, June 26th, 2010 AT 5:13 AM