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I have a 2015 GMC Sierra 1500 5.3 V8, been having issues lately with what seems to be shifting and gears wise. Started off riding really rough when shifting from V4 to V8 while accelerating, now this morning I left for work and came to the neighborhood stop sign and it completely stopped moving while in Drive, hitting accelerator the truck did not budge, still running and will shift into different gears but just won’t move! No Dash lights have popped on at all. Help please!
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Here’s some info I found relative to the 6L80 6 speed transmission for your truck. It seems the manufacturer, GM, has known about the issue..
Here’s the lawsuit filed just 5 days ago.. I’m not certain though whether it includes the 6L80 or not, but it definitely lists the 8L80https://theweeklydriver.com/2022/01/gm-lawsuit-claims-faulty-transmissions/
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