Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP
Do you know what trouble code is setting in the computer?
If the reduced engine power message is coming on, there will be trouble codes set. The throttle is electronically controlled, so if there is a problem in the throttle body, accelerator pedal position sensor, throttle control module, or the wiring, this message will display. Since the throttle body has been replaced, this does narrow down the possibilities somewhat, but there are still numerous components that could cause the problem. You could double check the wiring and then replace the accelerator pedal (comes with the sensors) and you would likely fix the problem. If you want to be more certain, pulling the computer codes will help to be more specific. Most any auto parts store can pull the codes for you.
See if they have a tool loaner program, they may let you sign out a scan tool to read the codes.