Did you have the vehicle control modules checked for DTC'S - diagnostic trouble code's ? Not going to a part's store an having it checked . Need to have a professional type scan tool hooked up , check code's in the BCM - body control module , the instrument cluster can also have DTC'S stored . Auto part stores can not check these code's .Viewing engine sensor data to the PCM to see what the real temp. is . Coolant temp. sensor is an input to the PCM/ECM - engine computer , this info is sent to the instrument cluster over the class 2 serial data network .Do you know what a automotive communication network is ? Plus GM had stepper motor problems in their instrument cluster's from 2003 to 2006 . The stepper motor is what controlls that needle .
How to repair GM Instrument Cluster Speedometer Gauge Stepper
Have you received any failure codes (check engine light)? If you have, find out what they are by going to any parts store and they can read your failure codes for free. Let me know after that.
Test the electrical circuit's ! Look at a wiring diagram so you know what wire's to test . Watch these video's , buy a DVOM - digital volt ohm meter . Learn to test so you don't listen to guesses .
Basic Electricity for Service Techs Ohm law Current Flow Opens ShortsMastering Voltage Drop Testing with Pete Meier and Jerry TrugliaElectric Testing Techniques You Need to Know Free wiring diagrams here . 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 headlamps . Click the search button then the blue link's . Right away in the first diagram i see the headlamp / panel dimmer switch is a input to the BCM - body control module . I mite think your first response would be to want to replace the BCM ! Reading a discription of how the lights are suppose to work may shed some light on the problem .
Headlamp ON/OFF control is determined by the body control module (BCM) by a signal on the headlamp switch on input circuit when the headlamp switch is in the HEAD position. When the headlamp switch is in the AUTO position, the BCM determines headlamps ON/OFF by the voltage from the ambient light sensor.
If the headlight switch is left in the ON position, the inadvertent power control feature will turn off the headlights approximately 10 minutes after the ignition switch is turned to the OFF position. If the driver places the headlight switch in the ON position after the ignition switch has been turned OFF, or if the ignition switch is in the ACCY position, the headlights will remain on until turned off or the battery runs dead.
The high beam indicator is illuminated when the instrument cluster receives a class 2 serial data message from the BCM that the high beams are illuminated.
Having the vehicle checked for DTC'S - diagnostic trouble codes , BCM - codes ! Need a professional type scan tool . Part stores can't read body codes , dealer or independent repair shop .
DTC B2575
When the body control module (BCM) senses a request for low beam headlamp illumination, the BCM sends a ground signal to the low beam headlamp relay through the headlamp low beam relay control circuit. The headlamp low beam relay will apply voltage to illuminate the headlamps.
DTC B2580
When the body control module (BCM) receives a ground signal from the multifunction high beam or flash to pass (FTP) switch commanding to illuminate the high beam headlamps, the BCM will energize the high beam relay by grounding the high beam relay control circuit.
DTC B2600
DTC B2610
The body control module (BCM) receives a variable voltage signal from the instrument panel (I/P) dimmer switch requesting to illuminate the illumination lamps to a desired intensity. When this occurs, the BCM directly sends a variable voltage based on the I/P dimmer switch position on the instrument panel lamps dimming supply voltage circuit, instrument panel lamps dimming control circuit, and the LED dimming signal circuit.
Voltage for the instrument panel lamps dimming supply voltage circuit, instrument panel lamps dimming control circuit, and the LED dimming signal circuits is from the TBC 2 A fuse in the instrument panel fuse block directly through the BCM to these circuits.
DTC B2620
The BCM directly sends a 5 volt reference voltage to the I/P dimmer switch which is then adjusted based on the I/P dimmer switch position and returned as a dimming return and dimming input to the BCM. The BCM uses this signal to directly control the desired level of instrument panel illumination lamp intensity.
Your best bet , take it to a qualified repair shop .
Take it an have it checked for DTC'S - diagnostic trouble codes . With warning light's on DTC'S are set in the ABS control module , the air bag control module ,PCM - engine computer or transmission control module . No guessing here ! Test an check
Never seen one of these engines so please excuse my answer but i can only answer from previous experiance with other makes of engine ,and that is the exhause gas is passing direct through a drilled passage in the cylinder head .But the valve will still be visable on the ousdie of the engine .
Possible HVAC blend door motor skipping over the gear drive due to a jammed blend door. Also it could be valve train noise in the engine, I would need to hear it really.
You need to check the voltage at the battery with the engine running. It should be at least 14vdc. If not, remove the alternator and have it tested at your local parts shop.
Ouch... might be time for the "GM" transmission overhaul... IF the transmission fluid and filter are not changed regularly during its life,, this wiLL happen...it happened to me TWICE.. ouch.. (vehicles were inherited).. I used a local drag racer who has a transmission shop.. they work great now..I have a hard time trusting some dealers.. so, ..I went to the local drag strip and asked around, found "the guy".. good luck..
I think you are going to need a transmission rebuild to resolve this, but take it to a good shop and have them do the diagnostic work to verify my preliminary guess.
Usually there is a hole in close to the cd slot, where a pin can be inserted in order to push out a cd manually or a similar manual override.
Which CD player/ radio are you using?
You have a wire issue on the door lock system a power wire is going to ground and draining the system. The fuse should have blown so that tells me the problem may only happen when the doors are closed. Turn off the dome light and start by leaving the fuse in and opening the drivers door and see if it drains in 4 hours. if not that is where the problem is. If not repeat with each door until all have been tested, If you still don't find the short you may check and see if there has been a recall for this problem. Otherwise take it to a shop that specializes in Auto electric. These problem can take months to find and it is will worth the cost to have a pro do it.
The first thing any good technician would do about the oil pressure is remove the sending unit and hook up a mechanical test gage to see what the pressure is, GM oil pressure gages are famous for this very complaint, most likely the oil pressure sending unit is defective. As far as the other problems go it could be related.
U0107 CHEVROLET - Lost Communication With Throttle Actuator Control Module.
Possible causes
- Faulty Throttle Actuator Control (TAC) module
- Throttle Actuator Control (TAC) module harness is open or shorted
- Throttle Actuator Control (TAC) module circuit poor electrical connection (loose or broken wires)
