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CooperS7777

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  1. I too can say I have noticed the vibrations much more so in warmer weather. I'm up in New England so the past couple months have been especially cool.
  2. Found the solution... Dropped it at the dealer and left it for them to fight with. Was so aggravated with the truck I made it down the road to another dealership and ordered a 2016 diesel (in the interest of staying on topic Ill leave the brand out, but its not GM). Picked my 6.2 Sierra up 4 days later and the vibration appears to be totally gone...she knew I stepped out on her and started acting right. In all seriousness, they replaced the rear diff, and re-programmed the power steering computer. My problem seems to be amplified when I am towing or have a load in the bed; one of the techs suggested perhaps the lighter load on the front end was causing the power steering computer to command the pump erratically. Sounds far fetched to me, but kudos to the tech for thinking outside the box; this is after 4 sets of tires and 2 sets of wheels, so I was happy to hear a new theory. So far, it is totally gone. I'm not sure why, and Im certainly not convinced that they actually fixed it, but for the time being its gone.
  3. After the first two sets of tires, I purchased a set of wheels and tires out of pocket (non GM wheels with stock size Nitto's) with the hope that this would resolve the issue. No such luck, it simply changed the speeds at which the vibrations occurred. I brought it back to the dealer and they essentially said "unless you put the stock wheels and tires back on were going to blame the vibrations on the wheels and tires you put on"; mind you my wheels and tires were both stock size, no lift, nothing crazy at all. Ran the truck home, swapped out my factory wheels and tires and dropped it back off at the dealer. After explaining everything to them as calmly as I could, I truly hoped they would search for a solution that was not "tires" yet again. After all, we are on the 3rd set of tires and 2nd set of wheels at this point. Much to my dismay, they called a few days later and stated "It turns out it was your tires. Even though your now above 36k miles, were going to install a new set as good will." Now we have been through 4 full sets of tires, and 2 sets of wheels and the vibration is back after just a few hundred miles. Has anyone had any luck lemon law-ing a truck after 36k? My hope is since its still under the "express" power train warranty, and no one can actually pin point a problem, the BBB will rule in my favor. I've got my fingers crossed; I really have no interest in taking the hit on mileage depreciation.
  4. I'm very glad to hear this Ron. I will be coming up on my 3rd attempt to resolve this issue shortly, and while Id love for them to fix it, I dont have much faith that they will. I've already begun reading up on NH lemon law, but my concern was just that - not being able to replace my 6.2 CC standard bed All Terrain with an identical truck, without loosing my butt in the process.
  5. Just checking in here from NH. My 14 6.2 All Terrain has its 3rd appointment coming up shortly for the dealership to attempt to fix the vibration. Thus far the only thing they have been able to do is adjust at which speed the vibration occurs. After seeing all the luck folks in this thread have had getting the issue resolved; I'm not holding my breath.
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