Pontiac 2004 Bonneville - Manual (Page 343)

Inflation - Tire Pressure
The Tire and Loading Information label, shows the correct
inflation pressures for your tires when they’re cold. “Cold”
means your vehicle has been sitting for at least three
hours or driven no more than 1 mile (1.6 km). See
Loading Your Vehicle on page 4-33, for the location of
your vehicle’s tire and loading information label.
If you’ll be driving at high speeds (e.g., speeds of
100 mph (160 km/h) or higher), where it is legal, set the
cold inflation pressure to the maximum inflation pressure
shown on the tire sidewall, or to 35 psi (244 kPa),
whichever is lower. See the example below. When you
end this high–speed driving, return to the cold inflation
pressure shown on the Tire–Loading Information label.
Example:
You’ll find maximum load and inflation pressure molded
on the tire’s sidewall, in small letters near the rim
flange. It will read something like this: Maximum load
690 kg (1521 lbs) 300 kPa (44 psi) Max. Press.
For this example, you would set the inflation pressure
for high-speed driving at 35 psi (244 kPa).
Notice: Don’t let anyone tell you that underinflation
or overinflation is all right. It’s not. If your tires
don’t have enough air (underinflation), you can get
the following:
• Too much flexing
• Too much heat
• Tire overloading
• Bad wear
• Bad handling
• Bad fuel economy
If your tires have too much air (overinflation), you
can get the following:
• Unusual wear
• Bad handling
• Rough ride
• Needless damage from road hazards
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