Thanks for the info. I put a MM on the battery and was getting 12.9v and 14.9v while running.
Another thing I noticed is while on the highway or coasting it stays in V8. Could this be because the cel is on?
I have read many posts that have the same issue I am having now, most do not say what had caused the problem or that the problem was resolved at all.
2007 Yukon xl
170k
Intermittent service TC/service ST light comes on at idle or while in first gear. Hard shift from 1st to 2nd then the...
Same issue here.
2007 Yukon XL
Intermittent "Service Traction Control/Service Stabili-Trac" light with a hard shift from 1st to 2nd. Everything goes back to normal after 2nd gear. Mostly happens at idle.
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