Hummer Problems!

[MtnHmr]

Hello All,
This is my first post so please bare with me. I have been lurking for quite some time and thought I would finally register. I have a problem that sounds similar to others I have seen but I think may be a little different.
I have a manual tranny with the adventure package.
Here is the scenario. I am in low range, first gear, going down hill. I am not touching the gas or brake. After 50 or 60 yards on any size incline the "TRACTION FAILED" message lights up on the drivers info display. At the same time the check engine light comes on and the engine starts to run extremely rough.
The local dealership has been great and even sent the shop forman out with his computer hooked up to the car for an off road excursion to attempt to diagnose the problem.
We returned to the dealership and called GM Technical Service where he was told that the problem was normal and was due to the software program. They said there is nothing wrong with the vehicle and that it was reacting the way it was designed.
I was very unhappy with this answer so I called Hummer Customer Service. They made thier calls and now have the same answer that there is nothing wrong with the vehicle and it is operating as it was designed.
I have been off-roading for years and bought the H3 to do the same. I did not pay this kind of money for a vehicle to have all the bells and whistles go off every time I go down a hill.
First off, has anyone seen these symptoms? Secondly, any help and advice would be greatly appreciated. I am at loss.
Thanks