I took it to a tranny shop and had them take a look at it. They scanned the truck and it did not have any fault codes. He test drove the truck and said the converter was kicking in and out which was causing the "shuttering" feeling in the truck. After the test drive we were sitting in the truck...
I have a 08 Denali, im not sure which transmission is in it however i do know it is a six speed and has the electronic shift. I had a transmission leak on the transmission cooler lines. I replaced the tranny cooler lines the tranny filter, and tranny fluid. When adding the tranny fluid i added 3...
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