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Drives

Found 4 results

  1. I have a 2017 GMC Sierra 1500 Denali 6.2L with the 8 speed transmission (73,000 miles). When shifting from park to drive/reverse there is a clunk and also when the truck is accelerating from low RPMs there’s a hard shift from 1-2 & 2-3 gear. I’ve taken it to the dealer multiple times and they “can’t find an issue” with it. Any help would be greatly appreciated! IMG_6286.MOV
  2. I have a 2017 GMC Sierra 1500 Denali 6.2L with the 8 speed transmission (73,000 miles). When shifting from park to drive/reverse there is a clunk and also when the truck is accelerating from low RPMs there’s a hard shift from 1-2 & 2-3 gear. I’ve taken it to the dealer multiple times and they “can’t find an issue” with it. Any help would be greatly appreciated! IMG_6286.MOV
  3. I have a 2017 Sierra with a 5.3. I have had free oil changes for the last two years and have used the dealer's supplied Dexos. My engine and transmission are working great. I have read that many people hare having issues with AFM and hard shifting trannies. I have use Amsiol signature in all my other vehicles. Has any one switched to Amsoil and experienced problems? I am wondering if I should leave well enough alone.
  4. I did a quick search and couldn't find anyone with my problem. The 8 speed trans in my 2017 Denali is increasingly shifting hard into first gear. Occasionally it will shift hard while slowly coming to a stop at a signal during normal around town driving. The other day I made a left turn slowly onto a street with an incline. When I applied a light amount of power, it shifted so hard into first that my head hit the head rest. When mentioning hard shifting to the dealer, they say that it is the nature of the beast. I sold my 2011 Denali to my son. I am really missing the 6 speed trans. Has anyone else had this problem and found a fix? Thanks everyone Jerry
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