GMC Hummer H3 2008 Owner's Handbook Manual page 281

Service and Maintenance
CAUTION
Mixing brands, sizes or types of
tyres on your vehicle (other
than the tyre brand/size/type
originally installed on your vehi-
cle) could cause you to lose
control while driving and may
also damage the vehicle. Be
sure to use the correct brand,
size and type tyres on all
wheels.
Using a tyre or wheel size other
than the size originally installed on
your vehicle may cause problems
or damage to various vehicle
systems, such as braking, ride and
handling, and resistance to roll-
over, and to electronic systems like
anti-lock brakes, traction control,
stability control, or roll-over air
bags.
. . . 280
CAUTION
If you add different sized
wheels, and then if tyres not
recommended for those wheels
are selected, your vehicle may
not provide an acceptable level
of performance and safety.
You may increase the chance
that you will crash and suffer
serious injury.
Only use GM specific wheel and
tyre systems developed for your
vehicle, and have them proper-
ly installed by a GM certified
technician.
CAUTION
Never drive faster than the
speed for which your tyres are
rated, regardless of the legal
speed limit. If you anticipate
driving your vehicle at high
speeds frequently and/or for
prolonged periods of time,
check with your vehicle/tyre
dealer for the proper type of
tyres to use for your specific
driving and weather conditions.