PurpleGoat88

also looking for this!

Any update on this?

I have the vibration at 35-50 mph feel it most in the floor. 14 double cab lt with 17s and bridgestones. Haven't taken it in just yet but I was a gm tech and I'm thinking the tcm issue that one guy found makes most sense as it's intermittent and doesn't fluctuate with speed. I'm going to take it in sometime soon and suggest these things and possibly a reflash if available. Mine isn't quite as bad as I'm hearing but it's enough that I feel it in my feet.