I just returned from a 4 day trip to Lake Tahoe with my new 2500HD 4x4 D/A. I noticed a groaning noise from my brakes after driving continuously for 8 hours (450 miles) both to and from the lake. Any ideas what might cause this noise? My truck only has 3500 miles on it and I was not towing anything when the noise occurred and it was not excessively hot out. The power steering pump also became quite noisy toward the end of the trips (again - both ways). I don't think that these two noises are related. Being new to the truck, I am not sure what noises are normal. Thanks for any insights you might have to offer.