Finding out whats wrong with my car

Not sure what model a 'cc' is, but the most likely cause is that you need to reset the security after the battery disconnect. Number one tip. Always maintain power to ECM and modules with a charger or even a little 9 volt PP3 will keep power for 30 minutes .

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How do i reset the Volkswagen anti theft system? - Vehicle ...

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Unlock the driver's side door using the key and switch the ignition to the ON position, but don't start the vehicle. If it's still triggered, roll up all the ...
2 answers · Top answer: It can be disconcerting when Your car won't start because of the anti-t
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Your key is stuck ? It won't move , it won't come out of the lock cylinder ? Can you shift it from park to drive , neutral etc... Are there any lights lit on the dash , yellow wrench light , service vehicle soon light ? any messages on Driver Information Center ? Your Cadillac has numerous electronic features controlled by modules - computers ! If your not familiar with electronics an these things I suggest you take it to someone who is . Does you Cadillac have console fool shifter ?
Electronic Park Lock (EPL)/Ignition Lock Cylinder Control Actuator: If the vehicle is equipped with automatic transmission and a floor mounted console gear shift, it has an ignition lock cylinder control actuator system in the steering column. The ignition lock cylinder control actuator purpose is to prevent the ignition key from being turned to the OFF position when the transmission is in any position other than PARK and the vehicle may still be moving. The column ignition lock system consists of an ignition lock cylinder control actuator, and a park position switch that is located in the automatic transmission shift lock control switch. The ignition lock cylinder control actuator contains a pin that is spring loaded to mechanically prevent the ignition key cylinder from being turned to the lock position when the vehicle transmission is not in the PARK position. If vehicle power is lost, and/or the transmission is not in the PARK position the operator will not be able to turn the ignition key to the lock position and will not be able to remove the ignition key from the column.
Linear Shift Assembly: If the vehicle is equipped with a column mounted gear shift, it has a linear shift assembly on the steering column. The linear shift assembly has a cable that runs from the linear shift assembly to the ignition lock cylinder case. The purpose of this cable is to prevent the ignition key from being turned to the OFF position when the transmission is in gear and the vehicle may still be moving. The linear shift assembly cable contains a pin that is spring loaded to mechanically prevent the ignition key cylinder from being turned to the lock position when the vehicle transmission is not in the PARK position. If vehicle power is lost, and/or the transmission is not in the PARK position the operator will not be able to turn the ignition key to the lock position and will not be able to remove the ignition key from the column.
The windows are no exception , they are controlled by modules in each door an are connected by a serial data communication bus !
The vehicle is equipped with power windows controlled by the door modules. Each passenger door window can be operated, either from a power window switch built into the driver door switch assembly (DDSA) , or, from a power window switch mounted locally on its associated door. The driver door window can be operated only from the driver door power window switch built into the DDSA.
When the driver door module (DDM) receives a driver door window switch request from the DDSA, the DDM examines the request and inspects to see if it has received any messages from any of the other vehicle modules prohibiting the movement. If no prohibitive messages have been received, the DDM then applies power and ground to the driver door window motor to move the window as requested.
When a passenger door module, passenger front door module (PDM), LH rear door module (LRDM), or RH rear door module (RRDM), receives a window switch request from, either the DDSA or the window switch mounted locally to its door, the passenger door module examines the request and inspects to see if it has received any messages from any of the other vehicle modules prohibiting the movement. If no prohibitive messages have been received, the passenger door module then applies power and ground to its associated window motor to move the window as requested.

Body Control Module (BCM)
On the lower left side of the I/P below the steering column is it's location .
The two rear passenger doors have there own switches. Each of the switches contain a power window up and down relay. A switch activation alone can control the up and down functions of the rear windows. However the BCM, upon receiving a Class 2 message from the DDM, can control the set of relays which will activate the rear window motors.
The BCM has nothing to do with operation of the moon roof , nor with the heated seats
Heated Seat Components
The heated seat system consists of the following components:
• Driver and passenger heated seat switches
• Driver and passenger seat back heater elements
• Driver and passenger seat cushion heater elements
• Driver and passenger seat back temperature sensors
• Driver seat module
• Driver door module
• Passenger door module
Nor does it have anything to do with 4X4 .
There is a main wiring harness behind the instrument panel ,an connectors . maybe one didn't get connected all the way . Hard to say what the problem could be without checking their work . Connection problems at the BCM . have to know how these systems work ,the BCM is what GM call's the power mode master , it receives inputs from the ignition switch
On vehicles that have several control modules connected by serial data circuits, one module is the power mode master (PMM). On this vehicle the PMM is the body control module (BCM). The BCM uses 3 signals from the ignition switch. These are the Ignition 0, Ignition 1, and Accessory.
To determine the correct power mode the BCM uses:
• The state of these signals
• The sequence of switch closures received by the BCM
• The status of the engine run flag

The BCM will then send messages on the serial data network to some of the module's an other's receive a wake up voltage signal via a BCM controlled relay . ign 1 or ign 3 . Very complex if you don't know about this stuff .
Fail-safe Operation
Since the operation of the vehicle systems depends on the power mode, there is a fail-safe plan in place should the body control module (BCM) fail to send a power mode message. The fail-safe plan covers modules with discrete ignition signal inputs as well as those modules using exclusively serial data control of power mode.
Serial Data Messages
The modules that depend exclusively on serial data messages for power modes stay in the state dictated by the last valid BCM message until they receive the engine status from the powertrain control module (PCM). If the BCM fails, the modules monitor the serial data circuit for the engine run flag serial data. If the engine run flag serial data is true, indicating that the engine is running, the modules fail-safe to Run. In this state the modules and their subsystems can support all operator requirements. If the engine run flag serial data is false, indicating that the engine is not running, the modules fail-safe to OFF-AWAKE. In this state the modules are constantly checking for a change status message on the serial data circuits and can respond to both local inputs and serial data inputs from other modules on the vehicle.
Discrete Ignition Signals
Those modules that have discrete ignition signal inputs also remain in the state dictated by the last valid BCM message received on the serial data circuits. They then check the state of their discrete ignition input to determine the current valid state. If the discrete ignition input is active, B+, the modules will fail-safe to the RUN power mode. If the discrete ignition input is not active, open or 0 voltage, the modules will fail-safe to OFF-AWAKE. In this state the modules are constantly checking for a change status message on the serial data circuits and can respond to both local inputs and serial data inputs from other modules on the vehicle.

Who did the work ? Do they have a factory Tech 2 scan tool ? Will the BCM communicate ?

Does it have heated seats? If so maybe they aren't turning off when the ignition is off. In that case, pull out the fuse for heated seats when you shut the car off. The inside of the fuse panel cover will have a diagram showing which fuse it is, likely a 15a. I'm not 100% positive on how to permanently remedy that particular problem beyond just pulling the fuse, it could however be a rather simple problem with the on/off switch not releasing the contacts when you move it to the off position.

Does it also have powered seats and/or power windows? It is also possible that either of the two are not shutting down the motor (window or seat motor) when the window or seat reaches the end of it's travel...this of course is not applicable if you don't have either thing all the way up, down or the seat all the way in one direction. The buttons can be stuck in one position and still activating power to the window or seat while they are at the end of it's travel and it would be rather obscure, both are devices that can still operate with the ignition off. In order to know for sure, after you shut off your car, sit quietly and listen carefully for anything that sounds like it is still running. It may sound like a high pitch whine or hum.

I would otherwise suggest that either your exterior or interior lights may still be running, but those things are a bit more obvious and aren't really enough draw on power, even with HID lights, to drain a battery overnight that was good enough to pass an electrical test. The same would apply to a security system.

well, check all your fuses and circuit breakers,next would be to check the connection at the swith, cad use a test light and also check for power and a good ground at the motors,it unlikely that all postions would stop at once and it be a motor,if they all stopped then its gottta be a fuse or switch or wiring.

sounds like your ECM might be bad. Is there anything else that will turn on besides the lights? It could just be a main fuse. I'd start at the interior fuses if any and then go to the main fuse block and check for any loose wires or blown fuses first.

Water leaks can be difficult to find, so mechanic may not be at fault. You have to be ready to spend some time on the problem. To find it you are on the right track weith seals but not with radiator. If it only occurs in heavy rain radiator or coolant is not a factor. WEhat you need to do is start at like the rear or front door and check the weather strips. If they all look fine have all windows up in car. Have one person in the car with a flash light. The other person should be outside the car with a water hose. Have the person outside start at a point and spray the car with the hose. While inside person checks for water coming in. This has to be done moving the hose slowly so you can look and find leak. This can take some time thats why you should try to locate leak yourself even if you pay someone to repair it instead of repairing yourself. Finding it can be expensive due to not knowing how long it will take to find.

you may have issues with wirings. check the ground if there are anything loose. Check your battery using a voltmeter. The battery may need replacing.

you have to pull up on the back seat and it will come up

If there is anything, that is in any way "burnt", it needs to be replaced.
I would try a local auto recycler before I ordered a new light failure sensor.