Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
Have you checked codes in the computer? If not, have your local auto parts store check codes. Let me know code numbers and we can proceed from there.
See if you can get the code number for the misfire, this will help to narrow down which cylinder is misfiring. For example, P0302 shows a misfire on cylinder #2. Inspect wiring to #2 cylinder injector and coil. Then you would replace #2 spark plug first, then #2 ignition coil.