My company has four 2011 silverados all of them over 100k . And all vibrate and shake . One has we have put 4 tires two different times / shocks and struts / u-jointes balanced drive shaft and now a transmission no fix .Dealership keep saying we don't know . I have read some one else on here say the dealer say farm beaming . As a former mechanic that is the biggest pile of sh&t I have ever heard . That is a full box frame and if that even plausible then you have a defect !!!! I'm looking at the spring bushing and a frame mounts are needing to replaced . Not sure that will be the fix. We have other trucks not GM and had 300k that's had brakes, tires, and didn't vibrate !!!!
