Cadillac 2007 XLR - Manual (Page 427)

When rotating P235/50R18 size tires, always use
the correct rotation pattern shown here.
After the tires have been rotated, adjust the front
and rear inflation pressures as shown on the Tire
and Loading Information label, see Inflation - Tire
Pressure on page 422 and Loading Your Vehicle on
page 354. Vehicles that have the Tire Pressure
Monitor (TPM) system will need to have the sensors
reset after a tire rotation is performed. A special tool
is needed to reset the sensor identification codes.
See your dealer for service. Make certain that all
wheel nuts are properly tightened. See Wheel
Replacement on page 432 and “Wheel Nut Torque”
under Capacities and Specifications on page 458.
{ CAUTION:
Rust or dirt on a wheel, or on the parts to
which it is fastened, can make wheel nuts
become loose after a time. The wheel
could come off and cause a crash. When
you change a wheel, remove any rust or
dirt from places where the wheel attaches
to the vehicle. In an emergency, you can
use a cloth or a paper towel to do this;
but be sure to use a scraper or wire brush
later, if you need to, to get all the rust or
dirt off.
XLR-V Tires
Tire rotation is not recommended if your vehicle
has P235/45R19 size tires on the front axle
and P255/40R19 size tires on the rear axle.
Different tire sizes front to rear should not
be rotated.
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