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About Bigmac

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    2017 Sierra 6.2 Max Tow
  1. 2 converters and 3 flushes later and shutter is still very much present. Worse when towing. 1 st gear is great but starts when shifts to second. Still working with tech and GMC for repair. I think they have a problem that might be hard to correct. 6.2 Max tow.
  2. Just thinking out loud in my head - with all the dealers trucks flooded in all the hurricanes and inventory low will they have the big sales? šŸ˜€šŸ˜€. Might not make any difference but....
  3. Iā€™d settle for the crappy shifting if I could get the shudder on accl out of it. 2 converters and 3 flushes and still apparent from 2 nd gear on very pronounced with rv towing. Still working with gmc on fix
  4. I must be the unluckiest truck owner out there. 2017 6.2 max tow 8 speed. Severe shutter when 1-2 shift. You can feel in steering wheel and floor boards and then thru the rest of the gears till rpm' s increase. Unload drivetrain (neutral) and gets baby smooth. 2 t/converters and 3 flushes later that is not the problem. Worse since new converter installed yesterday. Still feels exactly like bulletin discusses. Will have to call GMC and open cr complaint. Tech is out of ideas. Any thoughts please feel free t holler
  5. As far as your temp gauge reading higher my 2017 max tow 6.2 does the same. I had a 2015 5.3 3:42 that I sold for the 2017. Trans temps are lower when towing on the 2017 but eng temp ( according to the inaccurate gauge) are slightly higher never a problem or concern but noticeable. Might have some to do with the grille shutters but they would be wide open at that temp.
  6. Most I've towed is 9000 and is no problem thru hills etc. Pulls like a champ. Lot of difference between 9 and 12 k. I also bought this as it is my dd also so did not want a gas guzzler 2500 Imo. Traded my 2015 Silverado 5.3 and mileage is the same and maybe slightly better in the 6.2. It also had the 3:42 butt gears. Good luck.
  7. Reason for sale ? Curious as to why your selling thanks.
  8. What are the symptoms. Shuttering? Going in for my 2nd tq in a few weeks.
  9. Did not watch him complete but have a good relation with the tech. Even give him a 20 buck tip. I did that job for years and worked as a s/m and factory rep. Bitch of a job and I have a lot of respect for techs since I was one a 100 years ago Thanks for your insight and will take it back again with a few more thoughts.
  10. Thanks for the info but all service bulletins have been completed. New part # converter replaced and flushed 3 times and the new type atf installed. Just seeing if any one else had continuing problems after all completed. I'm on top,of this like a tic on a dog. I found where the converter part # has changed from 24279497( bulletin part#) to 24280633( which is what I had installed) to a new number 24285996. If anyone knows if just a number change or maybe a newer part in the system. Dealer has blank stares when I start asking.
  11. 2017 Sierra 6.2 8 speed max tow. 3500 miles. Still has shudder even though converter replaced and new type fluid installed. Has anyone else have the continuing problem or has it been corrected? Shifting on mine is good but the shutter is bad especially when towing.
  12. Correct. Lemon Law only applies to new vehicles and to the original owner listed on the title. Been involved with such as an ex factory rep.
  13. Good luck. I've had both the converter replacement with the new one and trans flush with the new good stuff. It did get better for a while but is back with a vengeance. Looking to figure out the problem. Thinking they might have a significant problem. It is very bad towing my trailer. Shakes like a dog pooping peach seeds
  14. Have had my tq replaced and new fluid and still shutters. Fluid change did help for short time but it has returned. Very bad pulling my trailer. So disappointed as the rest of the truck is outstanding. Purchased specially for towing. 2017 Max tow 6.2. Trying to decide my next route to resolve this situation.
  15. This is a copy of the bulletin floating around. Replaced mine for same problem but did not cure. Re did flushes and helped. Good luck. I think they have a problem with ATF causing some shuttering. If you take the part # for the tq they will update to newest part #.

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