Hummer 2010 H3 Owner's Manual page 194

9-10 Driving and Operating
The H3 has an approximate
approach angle (A) of 37.4 degrees
and an approximate departure
angle (B) of 34.7 degrees,
depending on suspension
packages.
The H3T has an approximate
approach angle (A) of 37.1 degrees
and an approximate departure
angle (B) of 31 degrees, depending
on suspension packages.
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Design specifications required a
minimum gradeability of 60%
(31 degrees) slope, with the
vehicle fully loaded, on high friction
surfaces with maximum vehicle
speed not to exceed 9.7 km/h
(6 mph). The vehicle is expected to
traverse this grade only for short
durations. Never stop and idle the
vehicle or park it on this grade.
The vehicle should be able to
traverse a 40% (22 degrees) side
slope at 9.7 km/h (6 mph) while fully
loaded on high friction surfaces.