BowtieGM3

It might help if everyone in this forum would go to the below link and post their complaints/issues concerning their 2014-2015 Silverado's & Sierra's. One more option for more people to get educated about the problems with these trucks, and it may garner more attention from GM. At this time the vibration issues is the 3rd most reported complaint for the 2014 model Silverado. Good luck to everyone! www.carcomplaints.com

I have a 2015 Reg Cab Short Bed 1500 also, but mine is a 4x4 with the black shocks. I had serious vibration starting at 40 mph and shake you off the road vibrations at 60 mph + along with a very firm ride. Dealer fixed the vibration issue by installing (2) new tires and rf balancing all (4) tires. All tires are under 10 rf balanced. No more shake/vibration at any speeds. What I do still have is the shudder throughout the whole truck that you feel after the jolt you get after hitting any imperfections on the road surface. My research found that no matter if you have a Reg. Cab 2 wheel drive, Reg. Cab 4x4 or long beds, or crew cabs, they all use the same leaf springs in the rear, unless you have the max trailering package. The front coils & shocks have different part numbers depending on model. Because the same leaf springs are used on my much lighter weight short wheel base 1500 as the longer wheel base my trucks ride is excessively firm, which lead me to change out the rear shocks to Bilstein 4600HD's. By doing so it stopped the skip out/tire hop/chirping when hitting a small bump in the road going around corners/curves. It also softened it up slightly in the rear. My next step was to install Bilsteins in the front, so I am glad to hear it helped out the ride quality on above members truck. I'll post back on results if I decide to install 4600's on the front. I'm on the fence on whether to sell/trade or to keep investing more money into fixing the ride quality that is a design flaw on GM. Frame is way too stiff, as well as the suspension. I believe because of this the 14-15"s have minimal tolerance to any rotational parts that are improperly balanced. As parts wear over time I believe it will trigger vibration frequencies that will resonate into the stiff frame/suspension. It will be a repeating pattern. I have very low miles on the truck at this time and nervous that the drive line vibe might show up in the future as many of you have experienced. If I invest in installing Bilstein's in the front and a vibration reoccurs, there may be a conflict with the dealer/GM as to fixing the issue as it no longer has the original shocks. I would have to retain the original shocks and reinstall them if GM were to instruct the dealer not to address vibration issues without the original shocks installed. I have been a loyal GM buyer for 35 years, but I am very disappointed with the ride quality of this truck. I have no other complaints.

I unfortunately have the vibration issues that previous members have posted complaints about. Truck is at dealer and GM has been made aware of the issue. After doing my own research on this vibration problem I came across the following repair instructions/guidelines to diagnose and fix the vibration issues. Interesting read. Seems legit. Maybe this is the correct path to fixing all these trucks. Any thoughts? http://oemdtc.com/6392/information-on-vibration-analysis-and-diagnostic-2014-2015-chevrolet-silverado-gmc-sierra