Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP
Hello and welcome to just answer and allowing me to assist you. Have you had a tune up recently? How many miles are on it?
First thing to check is your TPS switch. I will include instructions on a link how to do this, the voltage should go up smoothly with no flat spots or replace it. http://easyautodiagnostics.com/gm/4.3L-5.0L-5.7L/tp-sensor-tests-1