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Old 03-30-2005, 12:21 AM   #3
Scooby Specialist
Member#: 41477
Join Date: Aug 2003
Chapter/Region: South East
Location: Jacksonville
2006 Tahoe that
will pull your bumper off


I had a similar question a long time ago. I was told it is from the boxer design of the engine. The pistons move inboard and outboard, as opposed to up and down with any other engine. The in and out movement is what produces the "rumble" feeling while sitting at idle. Someone chime in here if I am wrong.
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dropmech is offline   Reply With Quote