2014 Sierra pulls hard right during acceleration

[JTDowdy]

Little back ground. I own a 2014 GMC Sierra 1500 with a 6 inch procomp lift running on 35s. Recently noticed that my truck is intermittently having issues with the steering wheel being out of alignment and pulling to the right during acceleration. Just yesterday I left work and noticed again that my steering wheel was slightly canted to the left a few degrees. As I pulled onto the highway and accelerated my truck pulled to the right so of course I started to test it out. Conclusion is that while going down the highway and accelerate hard my truck pull hard right and when I come off the gas the back end sways back and forth until truck straightens out. Whole process under hard acceleration is borderline uncontrollable. Normal driving it is manageable, but still very noticeable. Like I said this symptom comes and goes with no reason and never happens mid drive. If its going to be off it is that way when I start the truck. The next time I get back in the truck it may be completely back to normal, as it was this morning. The new development yesterday was that I live on an old country road. The type that you don't miss potholes you just pick which ones you'd rather hit. Anyways last night as soon as I hit my first couple pot holes the steering wheel when back straight and my truck no longer pulled to the right during acceleration. Can anybody help I'm kind of confused and frustrated as I know it will be a pain to recreate the symptoms at the dealership if the truck doesn't want to cooperate. Locked Hub? 4wheel drive works and I have no abnormal noises. Suspension issue? struck isn't sagging on either side. Any help is appreciated thanks!

[Garykk]

Pulling to either side on accel is usually an indication of the rear end moving, something in the rear is loose or broken...

[fondupot]

check torque on control arms.

 

Does it dive the same way under harder braking?

[Dirtbiker]

It might be that the ubolts holding the rear springs to the axle have become loose. This happened to a friend of mine before. His axle twisted and his tires tore up the fender flare on one side

[Jason Jay]

2012 Sierra with 100k jerking hard left when braking jerking hard right during acceleration.

[Jason Jay]

Did you ever figure out what was wrong? Mine sounds exactly the same....steering wheel being cocked off center...then jerks hard left during a brake and is cocked the opposite way...then I accelerate and it jerks hard right....it's a cycle. Just started today. No warning or noises...finally after 60 miles the traction and stabilitrak went to OFF and won't let me put them on. I just had the truck aligned 7 weeks ago after I put 2" leveling spacers in the front. In the process I had to replace both upper control arms and ball joints in the lowers. I drive it less than 10 miles a week. On a weekend trip and it started.