Vkk

Same thing for me, but still dealing with them, Apparently they said No further repairs required as everything under acceptable conditions. So Now I filed dispute to CAMVAP to get decision. There we’re offering me $250 gift card with 2 complimentary oil change.

For me they inspected U-joints, opened rear diff, measured backlash and checked torque converter, trier torque converter ON/OFF manually if any changes happened but so far nothing, So May be i have the same issue that you had related to drive shaft. are you having Humming noise with bit vibration but only while accelerating ? It’s not constantly though?

Finally I made big thing against dealership, case is gone higher to executive review team, Now dealership is saying nothing wrong with powertrain, they’re thinking rear tires need balancing, due to off balancing it causing having noise on speed at 120km/h. I asked them to do balancing and prove me, they refused and said I will not get any services at this dealer as I posted bad reviews and complaint to GM higher case Center. But, I told GM executive review team that at my expense they have to prove me that noise is coming due to off balancing, but according to my knowledge if it’s related to tires then noise has to keep coming at any certain speed with continuous but my case it is coming only if you accelerate, if you let go the pedal noise goes away even at 140km/h. That’s my argument. They’re still figuring out.

I got 2021 GMC Sierra 1500 AT4 3L turbo diesel,It is still under Warranty , truck is having abnormal noise and vibration while accelerating, only felt noise and vibration at high speed on high way, truck got 60000 kms,( Noise is like humming but rhythmic not constant like bearing, and only if you accelerate if you let go the accelerate, noise goes away even on high speed). I went to see dealer to address the issue, first they took the test drive and told me that they could not see or hear any noise on high way speed. so I asked the manager to get test drive with me So he sent his shop foreman with me on test drive, he felt the noise and vibration so I dropped my truck for troubleshooting. few days later I got response from them that they collected some vibration data and they have abnormal vibration coming from rear end, so they were waiting for an approval to open rear differential for inspection, one they received an approval from their engineering team, they opened and they looked at the oil and they saw some scoring on main gear, they measured the backlash and they found 0.010", they said according to GM standard backlash has to be 4-6 thou and allowable upto 10 thou, which is I have right now so I was asked to drive the truck for some kms and come back and they will look at it again and see that is issue or NO. After driving another 1300 kms I went back and I dropped my truck for 2 days, only they did is took the test drive and told me they haven't felt any vibration or noise on highway speed 110km/h. So I said you can feel it if you go on speed above 115km/h and advisor told me No. truck is made for 110km/h according to the ministry of transportation high way speed limit, I said there is a vibration and noise coming for sure but for human being to feel that noise/vibration you have to go on that speed, SO now they are changing their statement that they collected torque converter data and sent it to their engineers to investigate further. And, they found nothing than normal from torque convertor so now what ? this point I involved GM Canada, submitted a case and it has been a week but still no response at all from them as well, I tried to get an updates from both side GM canada and dealership, GM canada told me they are still waiting some information from dealer, I thought GMC has good reputation for their service and warranty standard but I would give zero to them. I am still waiting for some response and solution from them. I have been working on this since January 17, 2025. filed a case to GM Canada on February 21, 2025. still nothing.. I am looking for some suggestion if anybody facing some issues....