The gaps were really, really big. Not sure how that even happens but it was terrible. However, I don't think that was the root issue. I started another thread about my issues that seem to root in the AFM/DOD part of the engine.
Plugs dirty after 800 miles
2010 Avalanche - Had a rough idle problem that was solved with new plugs a while ago, but now I feel like it's coming back after only 800 miles. Pulled a few plugs (1, 2, 3, 7) today to check them out. I could be wrong, but I don't think they're supposed to look like this after 800 miles...
www.tahoeyukonforum.com
