Chevrolet Low Cab Forward 6.7L Diesel Engine 6500XD (GMNA-Localizing-
U.S.-15749874) - 2022 - CRC - 12/2/21
244
Vehicle Care
The difference in diameter of the tires for a
dual-tire wheel should be within the limit
specified in the table below. If the limit is
exceeded, the tires wear more rapidly than
they should.
1. Front Wheels
2. Rear Wheels
{
Warning
If differently sized tires are used between
the front and rear axles, do not exchange
tires between the front and rear axles;
otherwise, the tires get loaded beyond
their limits. This is highly dangerous
(Continued)
Warning (Continued)
because the tires and disc wheels could
break down under an excessive load. You
and others could be seriously injured.
Permissible diameter difference
Radial tire
Within 8 mm (0.31 in)
Vehicles equipped with nylon wheel spacers
need to have the wheel spacers replaced
every time the tires are rotated.
Retightening Wheel Nuts
Check the wheel nuts to make sure they are
tightened to the specific torque by using a
torque wrench.
Use the following methods to check loose
wheel nuts. The tightening torque of the
wheel nuts may decrease after a tire change
or rotation due to their initial settlement.
After driving 160 km (100 mi) and after
1 600 km (1,000 mi) , be sure to retighten
the wheel nuts to the specified torque.
Repeat whenever a wheel, wheel bolt,
or wheel nut is removed.
Tighten the wheel nuts in a diagonal
sequence to the specified torque.
Wheel nut tightening torque
644 N·m (475 lb·ft)
Wheel nut tightening sequence
{
Warning
If you find any abnormal conditions with
the wheel nuts such as frequent
loosening of retightened nuts, have your
vehicle checked or serviced at the nearest
dealer as soon as possible.
Fully engage the wheel bolt wrench on a
wheel nut to be able to tighten the nut to
the specified torque. However, do not use a
pipe as a handle extension or your foot to
