I'm driving and then the message center displays "engine power reduced" and "sevice traction control". My car then does not increse in speed and i have to pull over and turn off the car and turn it on again! Sometimes it works fine again and sometimes it does not! I took it to the chevy dealer and they supposedly fixed it but it did it again! At the dealership they replaced the throtle body and recalibrated idle and gave me a bill of $1,400.00. I took it back to them and now they are telling me that it is the gas pedal that does not work! I dont know what to do!!!!! Any answers out there!!!!!