This light also comes on for a few seconds and then
goes off when you turn the ignition to ON/RUN.
This indicates the TPMS is functioning properly.
If the low-tire pressure warning light comes on while
driving your vehicle, the system may have detected a
low-tire condition. You need to stop as soon as possible
and check the tires.
The low tire pressure warning light may come on in cool
weather when the vehicle is rst started, and then
turn off as you start to drive. This could be an early
indicator that the air pressure in the tire(s) are getting
low and need to be in ated to the proper pressure.
A Tire and Loading Information label, attached to your
vehicle, shows the size of your vehicle’s original
equipment tires and the correct in ation pressure for
your vehicle’s tires when they are cold. SeeLoading
Your Vehicle on page 4-19, for an example of the
Tire and Loading Information label and its location
on your vehicle. Also seeInflation - Tire Pressure
on page 5-55.
Your vehicle’s TPMS can warn you about a low tire
pressure condition but it does not replace normal
tire maintenance. SeeTire Inspection and Rotation
on page 5-61andTires on page 5-49.TPMS Malfunction Light
The TPMS will not function properly if one or more of
the TPMS sensors are missing or inoperable. When
the system detects a malfunction, the low tire warning
light ashes for about one minute and then stays
on for the remainder of the ignition cycle. The low tire
warning light comes on at each ignition cycle until
the problem is corrected. Some of the conditions that
can cause the malfunction light to come on are:
One of the road tires has been replaced with the
spare tire. The spare tire does not have a TPMS
sensor. The TPMS malfunction light and DIC
message should go off once you re-install the
road tire containing the TPMS sensor.
The initialization (reset) procedure was not
performed correctly after replacing or rotating tires
or wheels. See “TPMS Reset” later in this section.
One or more TPMS sensors are missing or
damaged. The DIC message and the TPMS
malfunction light should go off when the TPMS
sensors are installed and the sensor matching
process is performed successfully. See your
dealer/retailer for service.
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Replacement tires or wheels do not match your
vehicle’s original equipment tires or wheels. Tires
and wheels other than those recommended for your
vehicle could prevent the TPMS from functioning
properly. SeeBuying New Tires on page 5-63.
Operating electronic devices or being near facilities
using radio wave frequencies similar to the TPMS
could cause the TPMS sensors to malfunction.
If tire chains are installed on the vehicle.
If there is a lot of snow or ice around the wheels
or wheel housings.
If a window tint that affects the radio wave signals
is installed.
If the TPMS is not functioning it cannot detect or
signal a low tire condition. See your dealer/retailer
for service if the TPMS malfunction light comes on
and stays on.
TPMS Reset
In order for the tire pressure monitoring system to work
properly you need to reset (initialize) the tire pressure
monitoring system. Any time you repair or replace a tire
or wheel, or rotate the tires the tire pressure monitor
system needs to be reset.
Do not reset (initialize) the system without rst correcting
the cause of the low-tire condition. If the system is reset
when the tire pressures are incorrect, the system will
not function properly and might not alert you when a
tire is low.
When initializing the system, the present tire in ation
pressure is stored as standard. The tire pressure warning
system determines decreased air pressure by comparing
the present and the standard tire in ation pressures.
When you change the set tire in ation pressure, it is
necessary to initialize the tire pressure warning system.
To reset (initialize) the system:
1. Park the vehicle at a safe place and apply the
parking brake. Turn the engine off.
2. Turn the ignition to ACC/ACCESSORY or
LOCK/OFF.
3. Adjust the tire pressure of all the installed tires
to the speci ed cold tire in ation pressure level.
4. Turn the ignition to ON/RUN with the engine off.
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Wheel Alignment and Tire Balance
The tires and wheels on your vehicle were aligned and
balanced carefully at the factory to give you the longest
tire life and best overall performance. Adjustments to
wheel alignment and tire balancing will not be necessary
on a regular basis. However, if you notice unusual tire
wear or your vehicle pulling to one side or the other,
the alignment might need to be checked. If you notice
your vehicle vibrating when driving on a smooth road,
the tires and wheels might need to be rebalanced.
See your dealer/retailer for proper diagnosis.
Wheel Replacement
Replace any wheel that is bent, cracked, or badly rusted
or corroded. If wheel nuts keep coming loose, the wheel,
wheel bolts, and wheel nuts should be replaced. If the
wheel leaks air, replace it (except some aluminum
wheels, which can sometimes be repaired). See your
dealer/retailer if any of these conditions exist.
Your dealer/retailer will know the kind of wheel you need.
Each new wheel should have the same load-carrying
capacity, diameter, width, offset, and be mounted
the same way as the one it replaces.If you need to replace any of your wheels, wheel bolts,
wheel nuts, or Tire Pressure Monitor System (TPMS)
sensors, replace them only with new GM original
equipment parts. This way, you will be sure to have the
right wheel, wheel bolts, wheel nuts, and TPMS sensors
for your vehicle.
{CAUTION:
Using the wrong replacement wheels, wheel
bolts, or wheel nuts on your vehicle can be
dangerous. It could affect the braking and
handling of your vehicle, make your tires
lose air and make you lose control. You could
have a collision in which you or others could
be injured. Always use the correct wheel,
wheel bolts, and wheel nuts for replacement.
Notice:The wrong wheel can also cause problems
with bearing life, brake cooling, speedometer or
odometer calibration, headlamp aim, bumper height,
vehicle ground clearance, and tire or tire chain
clearance to the body and chassis.
SeeChanging a Flat Tire on page 5-70for more
information.
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