Cadillac Repair Questions? Ask a Mechanic for Answers ASAP
Hi, I' m Chad. Welcome to JustAnswer. I' m reviewing your question now, and I will be post back with your reply ASAP
is there a A red led security light flashing or steady on on the dash while you trying to start it ?
the security alarm module might be bad or need resetting , lets try resetting it if you have not already
Master Reset Procedure1-Disconnect battery ( Both Cables ,The Negative & The Positive Cable ) 2-Touch Cables together and hold 20 secs and let go 3-Hold Brake pedal down 10 secs 4-Wait 10 minutes and then Reconnect Battery 5-Close all the doors 6-lock the car with key from driver door ( IF your car is Equipped with a bladless key then just locked with the key Fob 7- Unlock car & Start your vehicle
please let me know
Thank YouChad FarhatASE Certified Technician
if that did not reset the module , then you need to have it scanned and retrieved the fault codes from the anti theft module
they systems has several components , the key, the receiver, the antenna , the module , door switch , hood switch , etc...
if any failed then the module will not send proper signal to pcm to allow start up, the system is integrated with the pcm , so there is not like a fuse or relay you can pull out , unfortunately.