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Reply To: GMC Sierra Denali 2016 transmission shifting issues

March 12, 2019 at 4:24 pm #530039
DazzRozze
Participant

Hi,
I ave a 2014 GMC Denali down here in Australia and have had the same problem as you. Take your Vehicle to a Dealership that know what they are doing and demand they do a Software update on your Transmission. Had mine done yesterday and fixed the problem completely.

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