Check to see if any diagnostic trouble codes have been stored and use a real time scanner to check the response of the throttle position sensor and oxygen sensors. The throttle position sensor sends a reference voltage to your power-train...
The grinding noise could be related to the starter motor and/or a flexplate ring gear defect. If so, the diagnostic is straightforward. Inasmuch as the check engine light is on, there is stored diagnostic data/trouble codes, that may be relevant...
The brake system and nearby components should be inspected. There has to be something noticeably loose to create that obvious of a noise on braking. Were a mechanic to look closely, he or she would undoubtedly find the issue as,...
Hi There, This is completely normal for the oil pressure to increase when accelerating. The oil pressure inside the motor increases as the motor works harder. Your oil pressure switch reads this change in pressure and relays this to the...
Check to see if any diagnostic trouble codes have been stored in both the PCM and TCM. Check the fuses in the circuits that power the transmission controls. Occasionally, a short in a sensor such as an oxygen sensor will...
What you are describing is often a sign of low transmission fluid or a faulty transmission control solenoid. As you know, automatic transmissions use pressurized hydraulic fluid to change gears. Every time a gear change is required, the car's computer...
Hi There, As you know, code P0332 relates to the knock sensor, which may be a result of code P0306, which relates to the crankshaft position sensor. When the crankshaft position sensor is detected to have more than a 2...
There are a number of things that may cause the kind of hesitation you are describing ranging from transmission control issues to fuel supply to ignition problems. This may also be caused by a faulty transmission speed sensor. The speed...
Hi King. Thanks for writing in today. You can request an estimate to have one of our mobile mechanics complete the fuel pump replacement for your Chevrolet Avalanche by clicking this link to the service page](https://www.yourmechanic.com/services/fuel-pump-replacement). In regards to doing...
What you are describing sounds like a wheel bearing that may be starting to fail. A wheel bearing will usually fail due to pitting or small damage on the surface of the rollers or the bearing race. Both the surface...
You need to turn on ignition to run position to see if theft system is activated? If it is you may have cleared the theft module and will need to get it reprogrammed to the key.
Engines require more fuel to start and run properly when cold. If the fuel mixture is either too rich or too lean for cold running, the engine can run rough or even stall. The fuel mixture can be effected by...
Rear sway bars are to help the rear of the vehicle to be stable when driving around turns or maneuvers and when towing another vehicle. The sway bar should not affect the vehicle when hitting bumps unless the links or...
It is possible that the fuel pump is going bad. This would cause a slow or lack of fuel delivery altogether. I would recommend having your fuel pressure test about qualified professional to determine if it is meeting the manufacturer...
Hello. It sounds like the pins in the transmission female connector may have gotten bent when you pressed the connection back in. From the codes you are getting you are having connection issues. It is hard to see it but...
Confirm that there are no parasitic loads while the car is both idle and running. The grounding of the alternator should be checked. If grounded through the block, make sure all engine to body grounds are adequate. The actual output...
Hi there. Your 2004 Chevrolet Avalanche should have an anti-lock braking system; which in most cases will restrict the braking to ensure this doesn't occur. However, there are some things that will restrict the ABS from working as it should...
Hello, thank you for writing in. The traction control system and the ABS work hand in hand to help keep you on the road in slick conditions. They are both monitored heavily by the computer which makes diagnostics a lot...
Hi There, This suggests you may have a short, a faulty connection somewhere in the main harness from the lights or potentially an issue with the charging system or battery. If the battery is weak enough, this may draw enough...
Yes, but any component in the lighting circuit could cause or contribute to the problem. An intermittent fault is causing a voltage drop in the circuit and that, in turn is causing the lights to dim. Often, there is a...
