2001 Cadillac DeVille Questions

Unanswered 2001 Cadillac DeVille Questions

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I changed spark plugs fuel filter but still no power going up hills and still get these codes.also changed mafs what could be the problem
Cirtcuit malfunction if I remove the keys from the ignition then reinstall them and start the car two times. If I clear the code, then If I don't remove the keys, just shut the car off, then restart it, no codes come ...
when windshield wipers are turned on, you can not turn them off until you turn the car off. They then turn off and stay off until you turn them on again. What could the problem be and what is the cost to repair?
Fuel and temperature gage works erotic
The mode Sw. changes but the air flow is very week except the floor and the defrost.
dash vents come on if it's super hot in car but not all the time.it seems if it's 120 degrees in car they open
When I go to crank my car the dashboard lights go off and won't make a sound. It says service theft system. I don't know what the problem is just need some help to fix this problem.
when i am driving my car i turn a corner and it makes a noise like clunk clunk... also when i use the gas petal.
How involved is the repair of the AC actuator control? The vents on the dash won't open. It only blows air on your feet.