mk3sang

This may not be applicable for those who's trucks been in and out of shops getting tire balanced. I purchased a used 2014 silverado 1500 z71 with a shake above 70mph. Faintly starts at 60 but pretty negligible until 70 then violent up to 80. Never took it above that. Dealer put new tires on, iron man or something I've never heard, and claimed balance. I had them look over it before purchase and they blamed the leaf spring pack as it was a heavier one with one more leaf for the 5th wheel it pulled. I replaced the shocks as well as checked balance on a driveshaft. None of it helped. I was going to try road force balance before replacing leaf spring back. Before the road force balance, I wanted to spend the lower cost on a regular balance. $30 for the rear 2 wheels and now it is smooth until 85mph. I know most people with the problem probably tried balance multiple times, even at multiple locations, but mine was definitely an unbalanced tire.

I bought my truck last week. 2014 SIlverado 1500 double cab LT Z71 5.3l. It had 93k miles and was sold as is with no dealer warranty. I test drove up to 60 mph where the roads allowed around the dealer area and was impressed all around. When I was going home, I felt a shake going above 65 mph. It starts at a faint vibration at around 60 that I only notice now that I'm aware and sensitive to it. Gradually gets worse the higher the speed. It's unbearable and extremely noticeable at anything above 70 mph. It does not change when accelerating, or braking, in D or in N. I noticed it disappears for a bit during hard enough turns. Have not had a fix yet. Tried new shocks (bilstein 5100) and leaf spring clamp. The truck does have add-a-leaf that was installed along with the 5th wheel mount that I removed now.