I checked my '03 trailblazer (4.2L) for codes and only 1 came up. It was a cylinder 2 misfire. I changed the plug, as well as, the coil. It runs great now. I tried to reset the SES light by disconnecting positive terminal from battery for a few minutes, as this worked after I changed the thermostat. That didn't work. I than checked manual and said to unplug pcm b and pcm I fuses and that didnt work either. Is there anything else I can try?
Tuesday, October 29th, 2013 AT 3:58 PM