High-Speed Operation; Tire Pressure Monitor System - GMC Yukon Denalid Owner's Manual

High-Speed Operation

CAUTION:
{
Driving at high speeds, 100 mph
(160 km/h) or higher, puts an additional
strain on tires. Sustained high-speed
driving causes excessive heat build up
and can cause sudden tire failure. You
could have a crash and you or others
could be killed. Some high-speed rated
tires require inflation pressure adjustment
for high speed operation. When speed
limits and road conditions are such that
a vehicle can be driven at high speeds,
make sure the tires are rated for high
speed operation, in excellent condition,
and set to the correct cold tire inflation
pressure for the vehicle load.
490
If your vehicle has P265/65R18 or P275/55R20
size tires and you will be driving at high speeds,
speeds of 100 mph (160 km/h) or higher, set
the cold inflation pressure to 3 psi (20 kPa) above
the recommended tire pressure shown on the
Tire and Loading Information Label. When you
end this high-speed driving, return the tires to the
cold inflation pressure shown on the Tire and
Loading Information label. See Loading Your
Vehicle on page 392 and Inflation - Tire Pressure
on page 488.

Tire Pressure Monitor System

The Tire Pressure Monitor System (TPMS) uses
radio and sensor technology to check tire pressure
levels. If your vehicle has this feature, sensors
are mounted on each tire and wheel assembly,
except the spare tire. The TPMS sensors monitor
the air pressure in your vehicle's tires and
transmit tire pressure readings to a receiver
located in the vehicle.
The TPMS is designed to alert the driver, if a low
tire pressure condition exists. If your vehicle has the
Driver Information Center (DIC), the driver may also
check tire pressure levels using the DIC.