GMC and Chevy 5.3L Trucks P0300 Random Misfire and Sometimes No Spark. This truck came in with the check engine light on and flashing. Running real bad. The whole left side (bank one) was not working. The main ground wire for the coils was bad.

This video was made as a demonstration how to repair things and should not be done with out the proper training and safety equipment. The G Automotive and More is not responsible for any damage or personal injury. Please if you don't have the ability to do these demonstrations, don't try and get a professional to do it for you.