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Question posted by nrayburn on February 13th, 2012

2002 Gmc Envoy Engine Stumbles When Speeds Get Up To 45-50mph

Vehicle has 215,000 miles; I've had catalytic conv., tune-up w/new spark plugs; oil change; fuel injector deep cleaning. This started after taking vehicle for oil change. I've had someone else check to insure oil filter,etc. was properly installed. What could it be?

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