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It first started under warranty. They first lubed the steering column which lasted 2 years, then after the sound reappeared, they replaced the steering column. Now 2007 it has returned again and they will only fix it, if I agree to pay half of the amount and agree to have major gasket repair work down at Ewald Chevrolet in Oconomowoc for $850. Ewald is a crook. They went fishing looking for anything wrong with my car and came up with a bad gasket. They said to prove that I am a loyal customer and am acting in good faith I should agree to have them perform all of the work. This has nothing to do with the steering column noise. I had the knocking noise since I bought the car new and now Chevrolet will not repair this ongoing problem. They stink, their product stinks, I can't wait to sell this Impala and will never own a Chevrolet again. Going Toyota from now on.

AnswerI've been told a brace behind the dash made of molybdenum (or magnesium... can't remember) can give a loud crack/pop sound. I know about the problem in the answer above - that one is more of a dull , muted clunking sound. If the one you're talking about is very loud, a single pop/crack, and not happening very often, it's most likely the brace. It's not supposed to be an issue, just expansion/contraction.

I have a 2001 Chevy Impala and experienced this same problem. The cause of this noise is the steering shaft. While my car was under warranty I took it in and was told there was a Technical service bulletin (TSB) requiring the shaft to be re-lubed, as with your car after a while the noise came back. With my warranty now expired I took the car to my regular mechanic who changed the shaft out solving the problem for about $120.00. The TSB had changed from replacing steering shaft to just the lube (cheap temp. fix).

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Q: Did anyone ever experienced a loud popping cracking noise while driving a 2001 Chevrolet Impala?
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