Chevrolet 2003 Monte Carlo Owner's Manual page 296

After the system has learned tire pressures with
properly inflated tires, the LOW TIRE PRESSURE
message will come on if the pressure in one tire
becomes 12 psi (83 kPa) lower than the other three
tires. The tire pressure monitor system won't alert you if
the pressure in more than one tire is low, if the
system is not properly calibrated, or if the vehicle is
moving faster than 70 mph (1 10 km/h).
The tire pressure monitor system detects differences in
tire rotation speeds that are caused by changes in
tire pressure. The system can alert you about a low tire
-
but it doesn't replace normal tire maintenance.
See Tires on page 5-59.
When the LOW TIRE PRESSURE message comes on,
you should stop as soon as you can and check all
your tires for damage. (If a tire is flat, see If a Tire Goes
Flat on page 5-68.) Also check the tire pressure in all
four tires as soon as you can. See lnflation -- Tire
Pressure on page 5-60.
The LOW TIRE PRESSURE message will also be
(calibrate) the system.
Don't reset the tire pressure monitor system without first
correcting the cause of the problem and checking
and adjusting the pressure in all four tires. If you reset
the system when the tire pressures are incorrect.,
the system will not work properly and may not alert you
when a tire is low.
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Any time you adjust a tire's pressure, rotate your tires,
or have one or more tires repaired or replaced, you'll
need to reset (calibrate) the tire pressure monitor
system. You'll also need to reset the system whenever
you buy new tires and whenever the vehicle's battery
has been disconnected.
To reset (calibrate) the system: The tire pressure
monitor system can be reset by turning the exterior lamp
control from OFF to parking lamps three times while
the ignition is in ON. It can also be reset through
the radio using the following steps:
1. Turn the ignition to ACC or ON and turn the
2. Press and hold the TUNE DlSP button on the radio
radio off.
for at least five seconds until SETTINGS is
displayed.
through the main menu.
3. Press the SEEK PSCAN up or down arrow to scroll
4. Scroll until TIRE MON appears on the display.
5. Press the 1 PREV or 2 NEXT button to enter the
6. Press the TUNE DlSP button to reset. A chime will
be heard to verify the new setting and DONE will
be displayed for one second.
appears on the display.
A chime will be heard to verify exit.
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7. Once the monitor has been reset, scroll until EXIT
8. Press the TUNE DlSP button to exit programming.
5-61