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More info They said over 800,000 GM vehicles were affected by this clanking sound and it is also possible that the sound is turned up a lot on the sound file...all the info on that site seem to explain my problem, except that sound file sounds like it is to loud and two chevy dealerships said...

Just found out what the problem is This link will answer all your questions pertaining to this issue http://www.pistonslap.com/

When I turn on my 2002 tahoe in cold weather the engine makes a strange sound for about 30-60 seconds and then once it warms up it is fine. I brought my car to a chevy dealership and they ran a diagnostics test and they said everything was fine, but this only happens when the car has not been...