Why is my car is revving to high rpms and getting bad gas mileage?

Jim

New member
A couple weeks ago I bottomed out on a curb. Now when I accelerate my car revs to high rpms (3000-4000). During normal driving when slight pressure is applied to the gas, the rpms jump from a little under 1000 up to 2000. My mpg also appears to have gotten worse. Right now I am averaging 11.8mpg for city driving. I've got a 2003 gmc envoy with around 130,000 miles.
 
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