During cold mornings (wisconsin) i start my truck and i have no power steering and soft brakes. it is my understanding that the power steering runs the brake boost. also, it is my understanding that there is a service bulletin that says that the power steering fluid should be replaced with low/cold temp fluid. my concern is what happens if i lose power steering and brakes while i am driving.
Steering linkage problems: i've had the same problem since i've owned my truck. my father, who also has a 2500hd, has the same problems as well. they lubed and greased the shaft at one point under warranty, but the problem has returned and is persistent in both of our trucks. both of our trucks are '04 models and i have less than 40k miles on mine. it feels like the steering wheel will come unattached from the linkage. not a very safe problem to have. i hope someone will take these complaints seriously. *jb