vehilce smells like gas in the exhast at all times, what are possible problems on 1999 GMC Yukon Denali

it also has a hard time going past 60 mph and issues with shifting

by in Colorado Springs, CO on January 15, 2012
1 answer
ANSWER by , January 16, 2012
I THINK THERE ARE 2 POSSIBILITY POSS PLUGGED FUEL FILTER OR POSS. PLUGGED EXHAUST