Cadillac 2007 DTS Owner's Manual page 413

CAUTION:
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If you use bias-ply tires on your vehicle,
the wheel rim flanges could develop cracks
after many miles of driving. A tire and/or
wheel could fail suddenly, causing a crash.
Use only radial-ply tires with the wheels on
your vehicle.
If you must replace your vehicle's tires with
those that do not have a TPC Spec number,
make sure they are the same size, load range,
speed rating, and construction type (radial and
bias-belted tires) as your vehicle's original tires.
Vehicles that have a tire pressure monitoring
system may give an inaccurate low-pressure
warning if non-TPC spec rated tires are installed on
your vehicle. Non-TPC Spec rated tires may give a
low-pressure warning that is higher or lower than
the proper warning level you would get with TPC
Spec rated tires. See Tire Pressure Monitor
System on page 406.
Your vehicle's original equipment tires are listed
on the Tire and Loading Information label.
This label is attached to the vehicle's center
pillar (B-pillar). See Loading Your Vehicle on
page 327.
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