Showing articles & questions for topic
Avalanche

The battery should be load tested by a professional. Load testing can only be reliably performed on a fully charged battery. If the battery passes a load test be sure it is NOT a marginal pass in which case you...

It sounds like you may have an evaporative emissions system leak. Your car has a small purge valve with a purge solenoid (https://www.yourmechanic.com/services/evaporation-vent-solenoid-replacement) in the Evaporative Emissions system that controls the venting of fumes from the fuel tank as these...

Hello, thank you for writing in. The cost of replacing your valve seals is going to vary by the technicians available in your area, and the availability of parts. Unfortunately, accessing the valves can be very difficult and its can...

Hi there. Check the ground wires to the instrument cluster and see if the wires are loose. A loose ground will cause the instrument panel to shut on and off all the time. Also, check the battery cables (https://www.yourmechanic.com/services/service-battery-cables) and...

The "thumping" sound you mention seems more like the torque convertor lock-up clutch in the transmission failing. It tries to lock up, can't recycles, etc. GM has a service bulletin on this problem - TSB Reference #3438A. Discuss this with...

Check for problem codes - you mention that the Check Engine Light is on. This could be the torque convertor clutch not releasing as you slow down, or not locking up smoothly when you reach 40-50 mph accelerating. And yes,...

Hey there, thanks for writing in about your 2005 Chevrolet Avalanche. If the gas cap was loose but then later taken care of, then the light may be due to another issue. You will need to have the Check Engine...

The shifting clunk you feel may be in the transmission when changing gears, the torque on the bands when released may cause the momentary reversal of the output shaft between gears. The manufacturer states in technical bulletin 01-07-30-042h (https://www.trutechtrans.com/Topic-1-00-04.html) that...

I would question the diagnosis for the dealer to show you the reason to get the cable replaced and why the cable is so expensive. Have them break down the parts and labor in the quote. I show about an...

First, you need to check the engine oil level. If it is low, top it off to the specified amount on the dipstick. If the level is normal, you may have a bad pressure switch that is simply not reading...

The traction control malfunction may not be related to the engine malfunction(s). In any event, the engine issue should be resolved first, especially as you have misfiring which has the potential to cause follow-on damage to other vehicle components (catalytic...

You will need to use a spray engine cleaner to remove all the oil from the engine where it is leaking and then look at the area while someone starts engine and turns the wheel to see if you can...

The fuse for the level control compressor is located in the under the hood fuse block. It is a 40 amp fuse number 61. There is also a relay between this fuse and the electronic suspension control module. In addition...

Sometimes the muffler will hold some moisture when the exhaust cools from the day before. This moisture will evaporate quickly when you first start the engine in the morning and goes out the exhaust as steam. This is most likely...

Torque convertor "shuddering" is a cycle where the torque convertor tries to lock up, can't, and re-cycles repeatedly. General Motors has a service bulletin - TSB Reference #3438A, that addresses this issue. Discuss this issue with your dealer.

You should certainly let the insurance company know that your car has not been returned to its condition from before the accident. As for why your car is bucking on acceleration, I can make a few guesses, but the only...

Hey there, thanks for writing in about your 2004 Chevrolet Avalanche. The Check Engine Light code received for the MAF sensor (https://www.yourmechanic.com/services/mass-airflow-sensor-replacement) means that a pinpoint test is required on the MAF circuit. It does not necessarily mean the sensor...

The outside door handle is made of plastic and can be broken apart until you can get to the lever with a pair of needle nose pliers. Make sure the door is unlocked at the time you pull up on...

The first thing to do is to have the Check Engine Light scanned (https://www.yourmechanic.com/services/check-engine-light-is-on-inspection) to see what code is stored. Once this is done, then the code should be diagnosed to see if it has anything to do with the...