Tyre Pressure For High-Speed; Operation - Cadillac XT5 2017 Owner's Manual

266 VEHICLE CARE
vehicle's maximum load carrying
capacity. See Vehicle Load
Limits 0 177.
How the vehicle is loaded affects
vehicle handling and ride comfort.
Never load the vehicle with more
weight than it was designed to
carry.
When to Check
Check the tyres once a month or
more. Do not forget the compact
spare, if the vehicle has one. The
cold compact spare tyre pressure
should be at 420 kPa (60 psi). See
Compact Spare Tyre 0 289.
How to Check
Use a good quality pocket-type
gauge to check tyre pressure.
Proper tyre inflation cannot be
determined by looking at the tyre.
Check the tyre inflation pressure
when the tyres are cold, meaning
the vehicle has not been driven for
at least three hours or no more
than 1.6 km (1 mi).
Remove the valve cap from the
tyre valve stem. Press the tyre
gauge firmly onto the valve to get
a pressure measurement. If the
cold tyre inflation pressure
matches the recommended
pressure on the Tyre and Loading
Information label, no further
adjustment is necessary. If the
inflation pressure is low, add air
until the recommended pressure is
reached. If the inflation pressure
is high, press on the metal stem in
the centre of the tyre valve to
release air.
Recheck the tyre pressure with the
tyre gauge.
Put the valve caps back on the
valve stems to keep out dirt and
moisture and prevent leaks. Use
only valve caps designed for the
vehicle by GM. TPMS sensors
could be damaged and would not
be covered by the vehicle
warranty.
Tyre Pressure for
High-Speed Operation
Warning
Driving at high speeds, 160 km/h
(100 mph) or higher, puts
additional strain on tyres. Sustained
high-speed driving causes excessive
heat build-up and can cause sudden
tyre failure. This could cause a
crash, and you or others could be
killed. Some high-speed rated tyres
require inflation pressure
adjustment for high-speed
operation. When speed limits and
road conditions allow the vehicle to
be driven at high speeds, make sure
the tyres are rated for high-speed
operation, are in excellent
condition, and are set to the correct
cold tyre inflation pressure for the
vehicle load.
Vehicles with 235/65R18 or 235/55R20
size tyres require inflation pressure
adjustment when driving the vehicle
at speeds of 160 km/h (100 mph) or