Question about 2003 GMC Envoy Xl
If it is a tinny rattle, I would suspect a loose heat shield on or above the exhaust. When it is cool, hit the exhaust with your hand at various points until you hear the rattle. If it is a heat shield attached to the exhaust, it can be repaired with a large hose clamp placed around it.
Posted on Nov 18, 2009
Had a similar problem with my 97 GMC Sierra. Mine turned out to the the catalytic converter.
Posted on Nov 04, 2012
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Posted on Jan 02, 2017
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