My check engine light did reset it self after driving around a bit.
I did clean up the old plugs and put them back into the Hummer. The pulgs gap was .065 when I removed them from the Hummer, so after cleaning them up I regap them back to .060 and put them back into the truck.
The Hummer runs like New Again after regaping the plugs. I at 49,000 Miles.
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