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  1. J

    6L80 running hot, no symptoms. Thoughts?

    So I've tried to research this before posting, sorry if I have missed anything. I have a 2013 Suburban Z71, 172,000, all original drivetrain with the towing package with auxiliary cooler. On a flat interstate, 75 mph, not towing, no load, in 85 degree temps, I am running a consistent 216...

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