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About mcbartell

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  1. I just purchased my 2017 Sierra Denali from a GM dealer with 61,9XX miles. On the test drive I did not notice the transmission stuttering nor for the first drive one hour home. Through out the next 2 weeks I progressively noticed it more and more. When I finally took a longer drive at highway speeds the stutter was undeniable. Called the dealership and they were very willing to do a transmission flush at no cost to me. 1 Hour later I was back on the road and the truck drives perfect.
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