No codes. The engine light went on and off intermittently which might be related to the clip on the spark plug wire bouncing on and off of the plug. When I got home I plugged my code tester in and it gave me a 0305 code, (don't quote me on the code number, going from memory last night), and stated "cylinder 5 misfiring". It's easy to find just give the wire a little tug and you'll see it's just disconnected. I stopped at the GMC service dept today, told them about my two incidents and they said they had not heard of any issues with this. If you find that thread or TSB Bob I'd be interested in seeing that. Thx
