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V8-5.3L

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Question
Car wont start new battery new starterr
Hi There, Depending on whether or not the vehicle will turn over or not depends on what the next step should be. If the engine does not turn over, I would recommend checking all connections related to the battery and...
Question
Transmission has delay shifting and no second. Change fluid and filter replace 1and 2 shift seliond no change.
Hi There, What you are describing sounds like possibly a bad speed sensor or potentially a faulty transmission control module, which also controls the speed sensors. The transmission control module has various sensors such as vehicle speed sensors, wheel speed...
Question
How much to replace o2 senser
Hi there. Quotes cannot be generated via the ask a mechanic portal. Your request is being forwarded to customer service. Please have your vehicle make, model, year, mileage, and VIN readily available. Your description sounds like there is a misfire...
Question
Climate control module. Heater core
Faults in electronic or mechanical control components in the HVAC system have no effect on the heater core in the passenger cabin. The heater core itself is not a component that would looked at as a cause of engine overheating....
Question
Interior dim lights out and won't come back on
Hello, thank you for writing in. The fuses that you need to check are located inside the cabin near the dashboard. These are the fuses pertaining to lights you are concerned with. Keep in mind the vehicle should always be...
Question
4l60e transmission shifting problem
The 1-2 shift failure on the 4L60E is often due to a faulty throttle position sensor (TPS). Test the sensor (there should be a smooth, linear electrical response over the range of motion) or substitute a known good unit. A...
Question
Stability light comes on and loss of power
This could be a problem with the programming of the computer systems under a possible recall or technical bulletin for the vehicle. You should have the system tested to see if there are any stored codes indicating a problem. If...
Question
My gas gauge has gone out. I was just trying to get an estimate of how much it could could to get it fixed
Hi there. The fuel level sensor receives a steady voltage input, and as the level changes the voltage output of the fuel level sensor change. The fuel gauge in the dash receives this signal and the gauge in the dash...
Question
Hazard lights are on and will not shut off.
Hi there. The hazard light switch may have been damaged during the event that the airbag was deployed. Get the airbag replaced and reset the airbag light and see if the hazard lights go out. On newer cars, the hazard...
Question
I have an 04 avalanche. I'm changing the oil pan gasket and now to the step where I remove the front crossmember. Do I need jacks
If you are attempting to complete this task on your own, I would highly recommend using the jack stands for support; as the cross-member can fall rather quickly and be difficult to hold up before both sides are removed. ...
Question
Code C342D
Hi there. Either the throttle position sensor (TPS) or the idle air control valve (IAC) is not working. Check the wiring to the TPS sensor and the IAC valve and see if they are plugged in and if there is...
Question
Major electrical issue
Hi there. Unfortunately, there could be dozens of possible sources as to why this is happening to your Monte Carlo. I would recommend having a professional mechanic complete an electrical problems inspection at your location; to help pinpoint the source...
Question
Security light flashing. No crank no start. After truck sits with battery disconnected,the truck will start and run. Is it the BCM
Typically when the battery has been disconnected for an extended period and is replaced, an error code will be triggered in the ECU of the vehicle and disable the ignition system. This is done as a security feature; but tends...
Question
I was told that on my 2006 Saab 97x w/5.3L engine that in order to change the upstream sensors the transmission has to be lowered.
The transmission could be lowered to make it easier to replace the O2 sensors, however, you do not need to lower the transmission to get the O2 sensor off. It would be best to remove the exhaust system and then...
Question
where is the crankshaft position sensor located?
Hello, thank you for writing in. Unfortunately this is one of the components that they have hidden from us on this particular vehicle. It is best obtained from the bottom of the vehicle. It will be located above the starter,...
Question
Truck won't start unless you hold peddle down
That suggests the air fuel ratio (at initial start) is far off, so far off that the normal start protocol doesn't work. When you open the throttle during cranking you're admitting sufficient extra air and it eventually starts. Of course...
Question
My car will run but stall out randomly.
The fuel pump is going to most likely be the cause of the no start and stalling. You may also have problem with the fuel supply module if your truck is equipped with the flex fuel control module. You will...
Question
Can you help me figure out how to fix a wobble in my truck..
Hello there a few things that I recommend checking to help you find the cause of your wobble. It is possible that the drive shaft is out of balance, the leaf spring bushings are bad, worn shocks or possibly bad...
Question
suburban wont start
Diagnostic trouble codes cannot be used to condemn parts, period. An oxygen sensor could be brand new, right out of the box and installed in the vehicle, but if the vehicle wiring in the circuit is defective, a code "implicating"...
Question
If my ecm pcm touches the frame and it sparks does it cause the computer to mess up.
Hi there. What you are describing is an indication of a serious electrical glitch within the ECM or PCM. The best way to determine this is to either have a professional mobile mechanic come to your location and attempt to...

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