Jump to content


  • Content count

  • Joined

  • Last visited

Community Reputation

12 Good

About Bigmac

  • Rank

Profile Information

  • Location
  • Gender
  • Drives
    2017 Sierra 6.2 Max Tow

Recent Profile Visitors

3,901 profile views
  1. Yes but will do it with 300 lbs of weight in back. It can be felt running empty but not as severe .
  2. Yes I am still working this exact problem. 2017 GMC 6.2 Max Tow. 2 converters and a complete trans and it is still present. Not to bad but still present till I load it pulling my trailer then it really shakes. Appears when it shifts 1-2 and continues on thru 4 at 1200-1800 RPM. When I get back home ( In Arizona for several months) I am to meet with District Engineer to see if it can helped. It feels like a vibration in driveline. Love the truck except for this problem.
  3. Just ran across this. I have a 17 6.2 8 speed max tow. . Has the shudder as I would call it from 2nd gear on up at 1500- 2000 rpms only on load. Pop into neutral or let off gas and it disappears. Have had 3 converters and 1 new trans and problem still continues. Becomes very bad when towing. Definitely feel imo that it is converter lock up. Waiting to have field engineer check but from reading this I might be sol. To bad as truck is great
  4. Back in the day when I was in the car business in pacific nw many dealers would buy Canadian trucks and swap out instrument cluster for correct reading. Only problem was getting warranty changed over but a few phone calls and things where good.
  5. Well I have a opinion on that. I had a 2015 Silverado 6 speed 5.3. Traded and bought a 2017 Max tow 6.2 8 speed to tow my rv. I read all the trans problems they had ( mostly shift issues) and waited to 17 to get one. Love the truck but developed a shutter, vibration low speeds. Terrible when towing. Ah I thought, needs a tq and flush according to bulletin. Well 3 tq later and a trans the problem has gotten worse. Truck has sat at dealer for 30 Days waiting for district rep and Field engineer to figure out. Yes I am way beyond Lemon Law ( I was a factory rep for another auto company ) so I know how it works. Love the truck hoping it can be fixed before I send demand letter. It seems with the stiffer frame vibrations are more prevalent. Millions out there with no problems but imo the 8 speeds create the most problems. Thatโ€™s my rant and Iโ€™ll go away quietly ๐Ÿ˜‹๐Ÿ˜‹๐Ÿ˜‹
  6. My 2017 6.2 runs hotter than my 2015 5.3 did. No problem and appears normal.
  7. 2017 Max Tow dbl cab. Installed firestone airbags for pulling camper. I load 4 - 60 lb sand bags when empty to help smooth ride. Airbags run 5 lbs empty. Makes it ride much better and helps traction in the rainey winters. But max tow rear suspension has a bit of a harsher ride when empty imo.
  8. My 2017 6.2 Max tow runs hotter towing then did my 2015 5.3 by a noticble margin but not alarming as it cools when the fans kick in.
  9. Being an ex s/m and then a factory service rep ( not GM ) they will not buy back as lemon law as it requires repair attempts , time out of service etc at least in the states where I called on. I agree repainting is not a best scenario but have had vehicles repainted that were better than factory. Also have had some worse. Best deal is to work with dealer. Been down this road with several customers over the years and I understand how you feel. You will have to decide how bad it really is. Not a good situation for you , dealer or manufacturer. Good luck.
  10. 2017 Max tow 6.2 8 speed. Mine is in shop for same concern 4 th time. Vibration is felt in steering wheel and gas pedal when accl. Have had 2 converters replaced and 3 fluid flushes. Love the truck but they truly have a problem with the converters. Made worse when towing my 8000 trailer. Truck rated for over 11,000 so itโ€™s not overloaded.
  11. 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.
  12. 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? ๐Ÿ˜€๐Ÿ˜€. Might not make any difference but....
  13. Iโ€™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
  14. 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
  15. 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.

Important Information

By using this site, you agree to our Terms of Use.