GasCan420

Yes, it shook after reaching 45 mph and up. Glad the dealership had seen this Problem before and knew it was my torque converter right away

No More Sierra Shudder! Torque Converter was replaced and the vibration is GONE!!! Time to go on an Adventure.

After further investigation, looks like I don't have the Chevy Shake after all, instead I have the Sierra Shudder, caused by a bad torque converter, so says the mechanic who seen and fixed this problem several times on the 2015 Sierra's. We shall see once the parts arrive and replaced!

No Road Force balance, just your everyday normal balance at local tire dealer. I will bring the Road Force topic up to mechanic today and ask for a print out to post. Thank You Tahoe02!

We'll, today is the day I get my 2015 Sierra checked out for the infamous Chevy Shake. Started small with having the tires checked for out of balance, I was told they couldn't get them balanced any better than what they already are.......check that one off the list. Get most of the Shakes at around 35mph, and intermittent after that, like occasionally hitting the rumble strips. Pretty frustrating buying a truck with only 6,300 miles on it and it needs work, I really wish it would have vibrated during our test drive. I'm hoping I can take the information on this forum and relay it to the mechanic today, sounds to me like he/she might find it useful. Wish me Luck!!!