Every w-body I've had experience with so far has done this. Something to do with how the IAC is designed causes the noise during a raised idle (like when the engine is cold). Supercharged, non-supercharged, 3400, 3100, 3800, LS4, you name it.
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10-19-2008
Every w-body I've had experience with so far has done this. Something to do with how the IAC is designed causes the noise during a raised idle (like when the engine is cold). Supercharged, non-supercharged, 3400, 3100, 3800, LS4, you name it.
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