Well, the truck is still at the dealer - they originally said that it was a rear wheel speed sensor, but later in the day I called to see if my truck was ready, they told me that they called GM and now the problem is with the ECM.
I'll find out later today if they fixed it.
Come on in, the door's always open - The closer's busted.
2011 Chevy 2500 HD LTZ Crew Cab LML - Leveled with 305-55-20 Cooper Zeon LTZ
MotorOps Delete tune
2007.5 GMC Sierra 2500HD SLT Crew Cab, 20" Weld Veociti 8's w/ 305-50-20 Yokahama Parada Spec X's