Have you already tried putting a new upgraded pump and hydroboost on to see if that helped you?
I have the PSC upgraded pump, power steering cooler, Royal Purple fluid, an LML hydrobooster, and my truck stops awesome...
Prior to installing all of that stuff, my brakes were pretty bad. My PS pump was on its way out, my hydrobooster had 235k miles on it, and the fluid was old..
Ben
How well did the lml hydroboost bolt up or was there a ton of modification to make it fit
AC Delco 178-0853Bump
Does anyone have the GM part number for the 2011 hydroboost unit? Thanks.