2001 GMC Safari shakes and rattles at idle and in reverse

2001 GMC SAFARI
107,368 MILES • 6 CYL • 2WD • AUTOMATIC
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GREENWA4
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Wy 2001 safari just came out of service two weeks ago. I had trouble apon its return it would skip at idle and while driving. When I took it back the dealer claimed that I had a bad gasket. When I challenged him on that he took it in kept it for two days and claimed that it had a loose spark plug wire. Now this week it has started shaking at idle and in reverse. It is very bad when in reverse or at a stop light but it levels out when I drive it. When it is being driven it is just fine, when I stop at a light or stop sign the rattling and shaking comes back. I don't trust the dealer enough to take it back without some idea of what I might be dealing with.
Mar 17, 2008 at 3:32 PM
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MASTERTECHTIM
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sounds like a bad lower intake gasket causing internal vacuum leak. have another garage give you a second opinion.
Mar 17, 2008 at 4:56 PM