Armydave81

Update to the issue. Nothing has resolved the issue and I just rolled over 57k. The truck has been scoped and rescoped. Drive shaft replacement fixed the issue found from using the scope but not the issue I am feeling. The vibrations are definitely still there. The truck has also been through a pinion angle check and shimmed to bring into GM specs. Still not resolved. I'm looking to replace the suspension and have the rear diff serviced soon. Maybe something will come to light with all of this. I'm also looking to replace the rims and tires but one step at a time to see if one thing or another actually resolves this craziness. Before you all ask why I never traded it in, there is nothing that they could give me to replace this truck. I got such a deal before the covid craziness that if I was to trade it in, my payments would literally have almost tripled for the same truck.

Interesting information, I will keep it in mind. Supposedly, the lead mechanic had switched out a driveshaft from another vehicle thus eliminating the vibrations. Now the waiting game for a new driveshaft. Who know when it will get here.

So...I originally posted this in July of 2021 and here we are in March of 2022. In January the dealership decided that they would replace all 4 tires in hopes that it would solve the issue. They use the same exact brand and everything. Called me to come get it and asked if he test drove it. Immediately was told everything was good to go and no more vibrations. Little do they realize that I can see the number of miles he puts on the truck every time he test drove it. He took it for a 4 mile test drive in an area when the highest speed limit is 45 and its 6 miles to the interstate (the only area where you can put the truck into the parameters to feel for the vibrations. So, off in the truck I go for my test drive. As soon as I hit 65 mph, guess what, still there. nothing ever changed. Turn around and went back only to hear that, there was nothing else they can do because it was within "GM Tolerances". I laughed and walked out. Blew up the Service Managers phone but no return calls. Took it to a different dealership to have a second opinion and had them confirm I wasn't crazy. So back to the original dealership I went with the information. They have had the truck for almost a month and finally got a call with news that the mechanic had narrowed the problem down to the driveshaft. But the kicker is that the part is on backorder with no estimated ship date. Now, new question would be, How much damage could driving around for close to 19k miles with an out of balance drive shaft cause? Transmission? Differential? U-Joints are a no brainer. I am starting to research that one and looking for input.

The tires have been road force balanced twice. Thats when they found the one bad tire already. Both times they were "within limits". I understand the theory with the tire pressure. I lowered the cold pressure in order to see if it would make a difference. So far, nothing has actually changed. The reason we were thinking it was because the pressures would go from 35 to 39 psi from just driving, not even adding the actual temperature outside into the equation.

So I had the truck left with the dealer over the weekend. The Master Tech drove it all weekend and said he could not replicate. I decided to take him on a ride. Now he feels what I have been complaining about this entire time. Something else I have noticed was that the tire pressure increasing from 34 to 37 over the time of this ride along. As the pressure increased the vibration was felt more. So we are under the impression that the tires are heating up and causing the pressure to increase. So to prove this theory, they are going to swap out the set for a different set of comparable size. Im hoping that this fixes the issue but now hearing that you have been getting the same issue makes me worry. Keep an eye on tire pressure on the interstate as the tires heat up.

Bought a 2021 Silverado with the minimax. Love the truck except for the 17 inch rims and tiny tires. So at around 800 miles I take it back to the dealer because it felt like the right front tire was out of balance. Literally was told to let the truck settle in another 1000 miles before bringing back. Yeah sure!? Ended up not being able to until about 5000 miles. They finally checked it out and rebalanced all the tires. Drove it another 1000 miles and still getting same vibrations. Take it back again and find that one of the tires was out of balance again. Found a belt broken in the tire. Tire was replaced. All good? Nope. Still getting the vibrations. The problem seems to only happen when crusing,not during acceleration or deceleration. It is felt coming from the right front. Noticeably from the passenger seat. In my mind i want to suspect suspension but ive also known drivetrain can do the same thing. Anyone else come across this issue?