20 Most Recent 2004 Chevrolet Cobalt Questions & Answers


The speedo needle stepper motor is defective, remove the instrument cluster and send it out for repair. This is a common problem on this year of GM all models.

2004 Chevrolet... | Answered on Dec 16, 2016


The cobalt shares the same engine as many other GM cars, notably the saturn ion , chevy cavalier, pontiac sunfire, and s10 and malibu and... long list.

2004 Chevrolet... | Answered on Mar 14, 2015


If the booster failed the brake pedal would take a huge amount of effort to stop the car.
You should have the computer checked for trouble codes if the ABS light is on.

2004 Chevrolet... | Answered on Jun 17, 2013


I doubt the security system would cause the problem.
Most systems prevent the starter from working as well as the fuel pump or injectors.
And once the starter cranks the engine it should not be involved.

2004 Chevrolet... | Answered on Oct 13, 2012


I have seen a spring on the window regulator which helps raise the window. Don't know about GM products made in the past 10 yrs.
You might look at a regulator at the dealer and see if it has one and if it looks like what you saw.

2004 Chevrolet... | Answered on Jun 26, 2012


You are slipping,If you are a manual transmission you need a clutch, if you are a automatic transmission, you will need a transmission rebuilt

2004 Chevrolet... | Answered on Feb 27, 2012


TPS I assume
Get it fixed by a trained mechanic right away or you may have it towed away instead to repair

2004 Chevrolet... | Answered on Jun 05, 2011


never noticed a connection on the side of a battery before ,unless it one of them funny american batteries with the connections on the side and not on top as normal cars

2004 Chevrolet... | Answered on Jan 17, 2011


YOU NEED CLIP REMOVAL TOOL TO REMOVE WINDOW CRANK HANDLE.YOU NEED DOOR PANEL FLAT TOOL REMOVE DOOR PANEL HATE TO SAY DOOR PANEL HAS AT LEAST 8 CLIPS LOCATIONS 4 CLIPS AT THE BOTTOM PANEL 2 CLIPS ON BOTH SIDES DOOR PANEL. YOU HAVE TO REMOVE 2 SCREWS HOLDING DOOR PULL CUP.YOU HAVE RELEASE CLIP BEHIND DOOR HANDLE USING TRIM TOOL.IF YOU HAVE TROUBLE GETTING DOOR PANEL OFF.HAYNES REPAIR MANUAL CAN HELP.

2004 Chevrolet... | Answered on Oct 07, 2010


after you get 1 or 2 cans of freon in it will come on.
turn cans of freon upside down to put in
will go in faster.

2004 Chevrolet... | Answered on Jun 23, 2010


if this car has a sunroof the drains could be clogged with dirt

2004 Chevrolet... | Answered on Jan 17, 2010


check the wiring

2004 Chevrolet... | Answered on Oct 09, 2008


Could be bad ignition switch or some other type electrical problem . Knowing how this system works on your vehicle is the key . The ignition switch is a low voltage input to the BCM - body control module . Depending on key position the BCM knows what relays to energize and what messages to send over the GMLAN serial data net work , PCM - engine computer . Hooking up a factory or some other type professional scan tool to view ignition switch inputs to the BCM , an checking for BCM DTC'S - diagnostic trouble codes .

Circuit Description
Moving the ignition switch to the START position signals the body control module (BCM) through discrete inputs from the ignition transducer that engine crank has been requested. The BCM verifies that theft is not active and sends a serial data message to the engine control module (ECM)/powertrain control module (PCM) requesting engine start. The ECM/PCM receives a 12-volt signal from the park/neutral position (PNP) switch or clutch pedal start switch notifying that it is safe to start the engine. There is a splice on this circuit in the fuse block-underhood that supplies power for the starter relay coil. The starter relay coil control circuit is then grounded by the ECM/PCM closing the switch in the starter relay suppling 12 volts to the S-terminal of the starter. Ground is supplied through the engine block.


Plus you need to under stand what power modding is , because the BCM is the power mode master . This will sound funny to someone who does not know about automotive electronics .
Serial Data Gateway
The body control module (BCM) in this vehicle functions as a translator between the High and Low speed GMLAN busses. The 2 communication protocols use the BCM to translate communicated serial data messages between the control modules over the 2 serial data busses.
Power Mode Master
This vehicles body control module (BCM) functions as the power mode master (PMM). Refer to Power Mode Description and Operation for a complete description of power mode functions.

Power to many of this vehicle's circuits are controlled by the module that is designated the power mode master (PMM). This vehicle's PMM is the body control module (BCM). The PMM controls which power mode (Run, Accessory, Crank, Retained Accessory Power, or Off) is active.

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 PMM receives 3 discrete ignition switch signals to differentiate which power mode will be sent over the Serial Data circuits. The 3-wire Ignition Switch table below illustrates the state of these inputs in correspondence to the ignition switch position:
Relay Controlled Power Mode
The body control module (BCM) uses the discrete ignition switch inputs Off/Run/Crank, Accessory, and ignition 1, to distinguish the correct power mode. The ignition 1 circuit is also routed to the Run/Crank relay for relay controlled power feeds during the appropriate power mode. The BCM, after determining the desired power mode, will activate the appropriate relays for that power mode.

Chevrolet Cobalt... | Answered on Nov 03, 2019


Sounds like the ignition key mechanism has failed. Probably needs replacing. Has anyone been attaching wires to it? If so, they may have mixed up the wiring.

Chevrolet Cobalt... | Answered on Nov 03, 2019


If you don't know if you have remote start you probably dont!.

Chevrolet Cobalt... | Answered on Jun 30, 2019

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