There is a thumping noise that happens sporadically from the drivers side wheel
2003 Chevrolet Avalanche 1500

There is a thumping noise that happens sporadically from the drivers side wheel

(2003 Chevrolet Avalanche 1500)
We think it has to do with idler or pitman arm. When we took it to a chevy dealer, they said they werent bad, but starting to wear. They had no idea about the noise. It happens mostly on hiway driving and seems to diminish when we let off the gas. It is a rapid "tat-a-tat" noise.
1 answer & 0 comments
Popular Answer
on February 28, 2015
Does your Avalanche have 4 wheel drive? If so does the noise seem worse if you turn in either direction? If it does I would suspect a CV axle joint going bad. Another possibility would be a differential output shaft bearing making the noise. Check those two and see if you can pinpoint the noise?
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General Diagnosis
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on February 28, 2015
Does your Avalanche have 4 wheel drive? If so does the noise seem worse if you turn in either direction? If it does I would suspect a CV axle joint going bad. Another possibility would be a differential output shaft bearing making the noise. Check those two and see if you can pinpoint the noise?
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