"TC LIGHT ON"CAR DOSENT TURN ON on 2004 Cadillac CTS

WHEN I PUT THE KEY IN THE IGNITION AND TURN IT AND IT SOMETIMES TURNS ON, WHEN ITS RUNNING ALL THESE LIGHTS COME ON AND ON THE STAREO PART IT SAYS "CHECK ANTI SYSTEM THEFT" THEN THE GAS AND OIL VALVE GO TO ZERO..THEN THE ONLY LIGHT THAT STAYS ON IS THEM "TC"... THEN SOMETIMES IT DOESNT TURN ON AND THE BATTERY COMPLETLY DIES ..& I CANT MOVE IT FOR DAYS...I TOOK IT TO THREE DIFFRNT AUTO SHOPS IN CLUDING THE DEALISHIP AND THEY SAY NOTHING IS WRONG WITH IT...

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3 answers 1 comment
I had a similar problem. It was the ECM.
WHAT DID YOU DO? DID YOU HAVE THE WHOLE ECM REPLACED OR JUST REPAIRED? HOW MUCH DID IT COST? AND DID IT FIX ALL THE GLITCHES? PLEASE ANSWER ASAP I NEED A FIX TO THIS PROBLEM I HATE DRIVING AROUND LIKE THIS...
Did you ever find out what was causing this problem?
MY CADI CTS 2004 IS ALSO DOING THE SAME THING EXCEPT THE BATTERY IS NOT DYING OUT... I'VE HEARD THAT IT'S A COMPUTER PROBLEM BUT I'M NOT SURE I BOUGHT MY CAR WITH 2 ACCIDENTS ON IT AND I THINK THOSE ACCIDENTS HAVE SOMETHING TO DO WITH IT, BUT IM NOT SURE... IT COULD ALSO BE SENSORS BUT THEN THAT WOULD BE A LOT OF SENSORS. I GUESS I WILL BE AWAITING AN ANSWER AS WELL.