2008 GMC SIERRA tire pressure

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Page 461 of 578

GMC SIERRA 2008  Owners Manual (A) Tire Size:The tire size code is a combination
of letters and numbers used to de�ne a particular
tire’s width, height, aspect ratio, construction type,
and service description. See the “Tire Si

Page 463 of 578

GMC SIERRA 2008  Owners Manual Tire Terminology and De�nitions
Air Pressure:The amount of air inside the
tire pressing outward on each square inch of the
tire. Air pressure is expressed in pounds per
square inch (psi) or kilopascal

Page 464 of 578

GMC SIERRA 2008  Owners Manual GAWR RR:Gross Axle Weight Rating for the rear
axle. SeeLoading Your Vehicle on page 4-36.
Intended Outboard Sidewall
:The side of
an asymmetrical tire, that must always face
outward when mounted on a

Page 465 of 578

GMC SIERRA 2008  Owners Manual Radial Ply Tire:A pneumatic tire in which the
ply cords that extend to the beads are laid at
90 degrees to the centerline of the tread.
Rim
:A metal support for a tire and upon which
the tire beads ar

Page 466 of 578

GMC SIERRA 2008  Owners Manual In�ation - Tire Pressure
Tires need the correct amount of air pressure to
operate effectively.
Notice:Do not let anyone tell you that
under-in�ation or over-in�ation is all right. It is
not. If your t

Page 467 of 578

GMC SIERRA 2008  Owners Manual When to Check
Check your tires once a month or more.
Do not forget to check the pressure of the spare
tire, if your vehicle has one. SeeSpare Tire
on page 5-112for additional information.
How to Check

Page 468 of 578

GMC SIERRA 2008  Owners Manual Dual Tire Operation
When the vehicle is new, or whenever a wheel,
wheel bolt or wheel nut is replaced, check the wheel
nut torque after 100, 1,000 and 6,000 miles
(160, 1 600 and 10 000 km) of driving

Page 469 of 578

GMC SIERRA 2008  Owners Manual Please note that the TPMS is not a substitute for proper
tire maintenance, and it is the driver’s responsibility to
maintain correct tire pressure, even if under-in�ation has
not reached the level t
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