2017 Acadia Denali slips shifting from 2nd to 3rd 50% of the time. Two trips to the dealer and one to a transmission shop. It doesn’t do it for them, so they say there is nothing wrong. Anyone else have this; or, does anyone have any information on a transmission monitoring option?

2017 GMC Acadia - Trans slips

KONegative May 14, 2021, 2:45am 6

Mostly…but not always. Sometimes when the truck is already warm. It really is random. I don’t think I have ever noticed it when really accelerating hard.

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2017 GMC Acadia - Trans slips

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