20 Most Recent 2004 Chevrolet Monte Carlo Questions & Answers

REMOVAL PROCEDURE 1. Remove the fuel injector sight shield. 2. Drain the cooling system. Refer to Draining and Filling Cooling System in Cooling System. 3. Use J 38185 in order to position aside the heater hose inlet and outlet clamps at the heater core. 4. Disconnect the inlet and outlet heater hose from the heater core. 5. Remove the RH Instrument Panel Closeout/Insulator panel. 6. Remove the LH Instrument Panel Closeout/Insulator panel 7. Remove the floor carpet. 8. Remove the rear floor air outlet duct from the holes in the floor reinforcement. 9. Disconnect the rear floor air outlet duct from the heater air outlet cover. 10. Remove the rear floor air outlet duct. 11. Remove the heater air outlet cover screws (2). 12. Remove the heater air outlet cover heat stakes (1) with a small chisel. 13. Remove the heater air outlet cover from the HVAC module assembly. 14. Remove the heater core cover screws (2). 15. Remove the heater core cover heat stakes (1) with a small chisel. 16. Remove the heater core cover from the HVAC module assembly. 17. Remove the heater core from the HVAC module assembly. 18. Remove the heater core foam seal (1) from the HVAC module assembly

2004 Chevrolet... | Answered on Jul 25, 2019

If you leave your key in the ON position for 15 minutes, the security system should relearn it and work once again. But the halo around the lock cylinder needs changing. You can purchase a kit from GM that includes the lock cylinder along with the halo. you do not need to replace everything, just the halo is what usually goes bad.

2004 Chevrolet... | Answered on Feb 01, 2019

The three plugs in the back are a bit tricky but 2,4,6 are all back there 6 is right by the O2 sensor you might have to feel around for them but you don't need a jack or any special tools just a ratchet, small extension 5/8 SP socket slide the metal sleeve forward and yank ******* the rubber plug wires after a while they will come loose 4 it about 3 inches to the left of 6 and 2 is back behind the coolant Reservoir

2004 Chevrolet... | Answered on May 24, 2018

If it's blue smoke, your burning oil. Get the head gasket checked. If that's ok your looking at something more serious, (more expensive), inside the engine.

2004 Chevrolet... | Answered on Feb 13, 2018

I suspect your catalytic converters are the culprit. Once they become clogged, they will rob your engine of power and provide false readings to the O2 sensors.

I would also check the compression on all cylinders to ensure you do not have any valves burnt or not seating completely.

Finally, these aluminum engines are notorious for blowing head gaskets, although I am still leaning towards the catalytic converters. FYI - there should be O2 sensors pre and post cat, which should help with troubleshooting.

I hope this helps.


2004 Chevrolet... | Answered on Feb 11, 2018

Air bag light lit ? Have checked for DTC'S -diagnostic trouble code's ! on top of the steering column an under the steering wheel is a part called clock spring . This colck spring allows the steering wheel to be turn full right to full left to keep electrical connection between the air bag module an the buttons on the steering wheel . Problem with the clock spring ,maybe .

2004 Chevrolet... | Answered on Dec 15, 2017

you can help from the service and repair manual which will provide every knowledge about your car with diagram and picture and you can fix the problem by your own and to get the manual go to the given link http://toolsnyou.com/

2004 Chevrolet... | Answered on Dec 12, 2017

Check the neutral safety switch

2004 Chevrolet... | Answered on Oct 24, 2017

Could be a bad relay. Or Programming to fob has been lost.. See if you can reprogram the key fob. Check website for procedure and see of that solves the problem..Check the obvious ..a weak battery in the key fob.

2004 Chevrolet... | Answered on Sep 19, 2017

It dosn't sound like you have a major problem .I would take it to a transmission shop for service oil filters testing for codes its about 100 bucks .new transmissions are a lot more .

2004 Chevrolet... | Answered on Sep 11, 2017

Does the car have DRL ? daytime running lamps Do you know how to test automotive electrical circuits using voltage drop testing . Do you know how to use a DMM - digital multimeter ? How to read an use a wiring diagram to find testing points in an electrical circuit ? IF not you probably won't be able to find the problem .
Electric Testing Techniques You Need to Know
Mastering Voltage Drop Testing with Pete Meier and Jerry Truglia
You will need wiring diagrams http://www.bbbind.com/free_tsb.html Enter vehicle info. year , make , model and engine size . Under system click on lighting ,then under subsystem click on headlamps . Click the search button then the blue links . Check B+ voltage to the fuse's ,check the headlamp relay in the left insturment panel junction block . Do you know where that is ? Your owners manual should say .

2004 Chevrolet... | Answered on Aug 02, 2017

If the car is otherwise working OK, it's probably your instrument cluster (IPC). There is an electronic sensor on your transmission that sends a signal to your engine computer (ECM) and the IPC. Your transmission changes gears in response to this sensor, so if it's shifting properly, and the other gauges are ok, the ECM should be OK

2004 Chevrolet... | Answered on Jul 18, 2017

This is a mechanical issue. Try moving the gear shift around. There's an interlock that prevents you from turning the key all the way off if the vehicle is in gear. This is so that if you are driving and the key gets turned accidentally, that the steering wheel does not lock! It the linkage is messed up, or in the case of a console shift, the cable is damaged or out of adjustment, you cannot turn the key to off. Sometimes you can push the shifter harder into park and it will allow the key to be turned the rest of the way to off, whick will also verify this problem.

2004 Chevrolet... | Answered on Jul 02, 2017

I'd use a fuel pressure gage and check correct fuel pressure. Once correct pressure builds up, see if pressure holds for a bit with everything off? If pressure drops like rock, you have a fuel pressure leak. Another thought would be evap leak?
How long since a tune-up? Any applicable trouble codes?

2004 Chevrolet... | Answered on Nov 13, 2016

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