[djdave33]

I have a 2005 duramax duelly. I have had it overheat pulling a 3000lb trailer when it was 75 degrees outside. I have it overheat unloaded and no trailer at 95 degree temp. The cooling fan starts to roar and the temp gauge keeps climbing untill the dic starts to flash coolant hot. Took to dealer on several occasions they changed the cooling fan assembly 2 times and then changed out the air cleaner assembly from a 2006 lmn but my truck will still overheat and sound like a SCHOOL BUS. I also have a problem with the steering issues. Namely the hard stiff steering at slow parking lot speeds and or when the truck is stopped and try to turn the steering wheel. It turns ok for about half of the wheel travel then it gets so stiff and looses power assist. I have had a new power steering pump installed, new steering gear assembly and was also told on one occasion that one of my tires was a few lbs to low on air that was causing me troubles. Imagine that on a $51000 truck that starting haveing these issues at 1613 miles.. The truck now has 21000 miles on it and I am afraid to use it anymore because I dont want to jeopardize my familys lives driving something that could leave us stranded on the side of the road somewhere. Gm states it can not duplicate some of the problems but the mechanics pull me to the side and say there are a (lot of complaints) about the same problems Iam having.
The truck is a 3500 hd DRW 4x4 with all the heavy duty towing packages and coolers.
I am hoping someone on here would have some suggestions as the truck now just sits in my garage unused.

thanks for any help,
David