2001 CADILLAC DEVILLE WONT START THE THEFTS LIGHTS FLASHING

SOURCE: 1999 cadillac deville air wont work

There's a blower motor (fan) under the hood and up against the firewall near the center of the car that takes some work to remove. It has gone out in the last 2 of my 4 Cadillacs. Turns out if you're not real careful with the positioning of the spark plug wires they will brush up against it, and if one of them gets cracked or brittle it will "arc" and short out the blower motor. The a/c compressor should still come on (you'll hear a click when it engages) but you won't get any air blowing into the cabin, hot or cold.

The part was like $200 stock (year 2000 prices) and it took about an hour to remove it. My Caddy at that time had this damn strut bar going across the engine bay which we eventually removed to get to the blower motor.

SOURCE: 2001 cadillac Deville won't start--it was fine all

IT SOUNDS LIKE THE BATTERY NEEDS MORE JUICE TO TURN THE STARTER. HAVE IT CHARGED. AND THEN HAVE THE ALTERNATOR TESTED AT YOUR LOCAL AUTO PARTS PLACE FOR FREE. PERHAPS THE ALTERNATOR IS NOT FUNCTIONING PROPERLY.I HOPE THIS HELPS. THANKS FOR USING FIX-YA.

SOURCE: 2001 Cadillac Deville TCC PWM Solenoid Circuit (p1860)

it should take approximately 4 - 5 hours plus the cost of sensor

SOURCE: 2001 cadillac deville, overheats without loss of coolant

First, provided their are no visible coolant leaks and/or loss of coolant with no signs of leaks, I would thoroughly flush cooling system and replace coolant, then check and/or replace thermostat (you can place thermostat in boiling water to check for proper function), if you have tried these 2 steps and still are experiencing overheating you may need to replace your water pump which can be a tricky job if you're unfamiliar and try to do it yourself, however, I could walk you through it if necessary. Also visually check your radiator hoses for bulges, wear ,etc along with heater hoses etc. You may want to also check radiator fins to see if they are dirty/obstructed and clean if necessary. Let me know if I can assist you further and how it works out

SOURCE: 2001 Cadillac Deville problems starting

I have had the same problem and I have come to the conclusion it is the security system. After 3 minutes the car will start so there is nothing wrong with the battery or starter. I have had it to the dealer a few times and they cannot solve it. It may be the locks on the doors and they may not be resetting properly. I have learned to live with it.