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Avalanche 1500

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Question
When I put my feet on gas pedal it won't go fast no more then 30
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...
Question
Grinding noise when I start my 02 avalanche check engine light on
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...
Question
Whenever I initially start braking over 25 mph I hear a metal clanking noise
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,...
Question
Oil pressure gauge goes up when accelerating
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...
Question
I have a 2002 chevy avalanche z71 it won't move forward in any gear,but it will move in reverse
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...
Question
How much is a transmission service
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...
Question
oil pressure low light came on one time for a few mins, went out hasnt came back on. what does that mean
When a low oil pressure warning is displayed, it can normally be narrowed down to one of three basic causes. An oil pressure sensor that is reading a faulty pressure, oil pressure that is actually low due to worn bearings...
Question
Knock sensor for 2002 chevy avalanche
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...
Question
What causes speed reduction when driving down the road.
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...
Question
Chevrolet Avalanche fuel pump replacement
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...
Question
I get a thudding sound from the passenger side wheels when I go into a left turn or drive into a left curve.
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...
Question
led bumper lights
Hi there. Thanks for writing in to YourMechanic.com. Unfortunately, we do not offer mechanical repair or service on aftermarket part installations like the LED lights you are referring. It is probably best for you to contact the manufacturer of those...
Question
My chevy avalanche has a charged battery but still wont start
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.
Question
Why does my truck run like crap til it is warmed up
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...
Question
How important are rear sway bar links ?
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...
Question
I am having transmission issues in my 2006 Chevrolet Avalanche after replacing the rear main seal.
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...
Question
Hi. I have an 04 avalanche the brake system seem to have locked up while i was driving. can u tell what it might be? its makes a l
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...
Question
Brake abs and traction control light on lost brakes today
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...
Question
I have a 2003 Chevy avalanche it runs great till I turn on the headlights then it goes into limp mode
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...
Question
2005 Chevy Avalanche dash lights occasionally go dim.
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...

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