Tire Pressure for High-Speed Operation

cold tire inflation pressure matches the recommended

pressure on the Tire 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 center of the tire valve to

release air.

Recheck the tire pressure with the tire 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.

Tire Pressure for

High-Speed Operation

{ Warning

Driving at high speeds, 160 km/h

(100 mph) or higher, puts additional strain on tires. Sustained

high-speed driving causes excessive heat buildup and can cause sudden tire failure. This could cause 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 allow the vehicle to be driven at high speeds, make sure the tires are rated for high-speed

operation, are in excellent

condition, and are set to the correct cold tire inflation pressure for the

vehicle load.

Gasoline only models with 235/

50R18 97V or 245/45R19 98V size

tires require inflation pressure

adjustment when driving the vehicle

at speeds of 160 km/h (100 mph) or

higher. Set the cold inflation pressure for all four tires to 270 kPa (39 psi).

Gasoline only models with 245/

40R20 95W size tires require inflation pressure adjustment when driving the vehicle at speeds of

160 km/h (100 mph) or higher. Set the cold inflation pressure to

290 kPa (42 psi).

Gasoline only models with 245/

40ZR20 95Y size tires require inflation pressure adjustment when driving the vehicle at speeds of

160 km/h (100 mph) or higher. Set the cold inflation pressure for the front

tires to 240 kPa (35 psi) and the rear tires to 260 kPa (38 psi).

PLUG-IN models with 235/50R18 97V and 265/45R18 101V size tires require inflation pressure adjustment when

driving the vehicle at speeds of

160 km/h (100 mph) or higher. Set the cold inflation pressure to 290

kPa (42 psi).