dmr183

Yeah I would not say the ring and pinion fixed mine. I test drove it after the replacement and it still vibrated just maybe not as bad. My fix was the continental tires. FYI, my Goodyears all road forced to excellent numbers, but apparently they were junk..... Also, they had to try 8 different continental tires to get 4 good ones to road force under 11. Good luck... Yeah I would not say the ring and pinion fixed mine. I test drove it after the replacement and it still vibrated just maybe not as bad. My fix was the continental tires. FYI, my Goodyears all road forced to excellent numbers, but apparently they were junk..... Also, they had to try 8 different continental tires to get 4 good ones to road force under 11. Good luck...

I posted my vibration problem about 2 months ago, here's my story. I bought a 2014 Silverado LTZ when they first came out in August 2013. The very day I drove it home, I called my dealership and told them something was wrong as it was shaking/vibrating above 70 mph. At first, they replaced 2 tires, (Goodyear ls) as they would not road force to the numbers they were looking for. After that they told me that the vibes were within spec and it was not a warranty issue because on their vib machine it wasn't too bad, but I knew the problem wasn't fixed although it was a little better. My vib was above 73 mph and only noticeable in the backs of the seats. Recently, after following Chappys post, I called them back and wanted them to look at my ring and pinion as it always vibrated above 73 mph. I delt with the shop foreman at my dealership and he has been very respectful. He said bring it in and we will measure the backlash on your ring and pinion. After he measured it, he said it measured anywhere from 5,000ths to 8,000ths and went ahead and replaced it. While he did that, he took my driveshaft to an independent driveshaft expert here in Tucson and had it balanced, he said it was 2 oz off. He said the new ring and pinion's backlash measures between 9,000ths and 10000ths , which he said is almost perfect. So I went and test drove it with him riding shotgun. The truck still vibrated at 73 mph+, but it was a touch better than before, but still not right. He suggested we swap tires to the ones they are putting on the new 2015 truck. He said he went through 8 tires, (continental) to get 4 that road forced between 8 and 11. He also mounted them on 2015 rims which were the same 20" rims I had before. I have since driven the truck a good 120 miles on the highway above 73 and guess what... Absolutely no vibration. The truck rides like a Caddy at all speeds. I never thought my truck would ever ride like it's supposed to but it does now! I think the ring and pinion replacement helped, but I believe my problem all along was those Goodyear tires!! I hope this May give some of y'all hope but I know not everyone has the same problem. Just based on my own issue, get rid of the Goodyears!! It has taken me 1 full year to get my truck to ride like it's supposed to. Thanks to this forum, I kept hope!

Bought a 2014 Silverado LTZ with 20" rims last August when they first came out. I test drove it to approx. 55 mph and all seemed good. On the way home from the dealership the day I bought it, I noticed a severe vibration in the backs of the seats once I reached highway speeds, 73+mph. I called the dealership immediately. We'll I have had my truck in to them prob. 12 or more times and finally they just told me it vibrates but is with-in specs.... BS, this thing rides like a skateboard! The only thing that reduced the vibration was road-force balancing the tires. It still vibrated but not as bad. We'll, it's been about 4 months since my last visit to the dealership, and my truck is back to vibrating pretty bad. They changed a few tires along the way but that didn't help. I got the same BS responses from the techs that other people have posted. I gave them a bad survey and now they don't want to deal with me because they're afraid I will continue to give them bad reviews, because they CANT FiX IT. Completely done with GM products!! Unsat!! Once I'm not too far upside down on this truck, it's getting traded in on something other than a GM product, good thing I got 1.9% interest. If ya'll have heard of a fix please let me know.