Have a 2003 Monte Carlo SS. Usually happens when I first start the car. The cruise control light comes on in dashboard at the same time the air, heat and defrost won't work. After a few minutes everything works normal or sometimes when you restart car.

Did you check fuses and relays first? Diagnose first, then repair. A new motor comes after you connect 12 volts to the old one and see if it works.

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Fuse Box Diagram Chevrolet Monte Carlo (2000-2005)

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2000, 2001, 2002, 2003 - Here you will find fuse box diagrams of Chevrolet Monte Carlo 2000, 2001, 2002, 2003, 2004 and 2005, get information about the ...

Your heat cold damper is not closing. Actuator could be sticking or bad. Or some of the foam has come loose on the damper seal. Have seen leaves in the system causing obstruction. The problem is most vehicles require dash removal to fix the problem.

If you haven't already tried, Try to disconnect the battery and reset the computer.

you have a chassis ground wire that is loose. engine to chassis or under dash

yes it is. it is meant to inform you that your loosing traction.

Check your firing order, could have crossed a couple wires.

this depends on whats wrong with the cruise control if its just a fuse then it will be relatively cheap if its the servo itll be a little more expensive but not extremely outrageous should be around $100 or less give a take a few dollars.

The ck engine light should not be ignored, what sensor was shown to be bad ? Have it scanned again and replace the sensor that is bad if it still runs rough you might want to consider a tune up. Plugs, wires, fuel and air filter's and clean the throttle body with some gumout. It could also be the IAC motor Idle Air Control. Good Luck

Sounds like a voltage problem. Have Charging, Starting , and battery system load tested.