GMC Chevrolet Tahoe 2003 Manual page 328

Driving Downhill
When off-roading takes you downhill, you'll want to
consider a number of things:
•
How steep is the downhill? Will I be able to maintain
vehicle control?
•
What's the surface like? Smooth? Rough? Slippery?
Hard-packed dirt? Gravel?
•
Are there hidden surface obstacles? Ruts? Logs?
Boulders?
•
What's at the bottom of the hill? Is there a hidden
creek bank or even a river bottom with large rocks?
If you decide you can go down a hill safely, then try to
keep your vehicle headed straight down, and use a
low gear. This way, engine drag can help your brakes
and they won't have to do all the work. Descend slowly,
keeping your vehicle under control at all times.
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CAUTION:
Heavy braking when going down a hill can
cause your brakes to overheat and fade. This
could cause loss of control and a serious
accident. Apply the brakes lightly when
descending a hill and use a low gear to keep
vehicle speed under control.