[mikeee]

03 escalade. 5.3L

It only happens when Im turning AND going up or downhill. for example it happens every time I get on or off my driveway. I dont really feel the rattle, just hear it. Has to be complete silence in the car to hear it. What could this be?

To best describe the noise, it souns like if you put one pipe inside another pipe with a small gap between them, so you can shake the pipe and hear the rattle.

 

[honda4x4nut]

Are all of the lights on the steering wheel buttons lit? cause if not the bulb could of come loose or broken. This could be your rattle ;If not do as I always do, Just start taking things apart, and pray you dont make anything worse or cause a bigger problem which has happened before but anyway....

 

[caddycruiser]

03 escalade. 5.3L
It only happens when Im turning AND going up or downhill. for example it happens every time I get on or off my driveway. I dont really feel the rattle, just hear it....To best describe the noise, it souns like if you put one pipe inside another pipe with a small gap between them, so you can shake the pipe and hear the rattle.

Yep, I'd say that's the Intermediate Steering Shaft. These GM trucks and SUV's seem to have had problems with that part ever since they were redesigned--and at this point, GM has gone through several different revisions of the part itself.
Take it into the dealer and explain what's happening, and mention the Intermediate Steering Shaft. Most likely, they'll already know full well about it and just replace it anyway--most keep the part in stock since it's such a common problem.
Couple years ago, GM just told them to keep re-lubing the shafts when owners brought them in for the problem, but they soon realized that was no more than a temporary fix. When we had our '02 Avalanche 2wd, my mother noticed that there was a "rattle and clunk" when she turned a lot of the time, especially if turning and hitting a bump at the same time. Back then, the dealer just lubed it and it stayed good. Had the same problem with our '04 Suburban, only worse (said she really felt it clunking and rattling when turning and going over a bump), called the dealer, and they just immediately replaced it with the latest part # one.