Hummer H3. Manual — part 1605

GENERAL INFORMATION

Service Reminder Indicators - Hummer

CHANGE OIL SOON INDICATOR

2003 H2

1. The Oil Life System will show when to change the engine oil and oil filter. This will usually

occur between 3000 and 7500 miles since the last oil change. Under severe conditions, the
indicator may come on before 3000 miles. The system will not detect dust in the oil. Reset
the system when the oil has been changed.

2. To reset oil life system, turn ignition ON, with engine OFF. Fully push and release the

accelerator pedal slowly 3 times within 5 seconds. If the CHANGE OIL SOON light
flashes, the system is resetting. Turn ignition OFF. Start engine and all to idle. The oil life
will change to 100 percent. If the CHANGE OIL SOON indicator comes back on, the
system has not reset. Repeat the procedure.

2004 H2

1. Turn ignition on, with engine off. Press the fuel information button until ENGINE OIL

LIFE appears on the screen.

2. Press and hold the select button for 5 seconds.

3. OIL LIFE RESET will appear on the screen for 10 seconds.

4. The oil life system is reset. Turn ignition off.

NOTE:

Most vehicles are equipped with a Malfunction Indicator Light (MIL)
or check engine light. If light comes on and remains on while
driving, the vehicle requires some type of repair. See appropriate
service and repair information. After repairing fault(s) and clearing
fault code(s), the MIL or check engine light should go out. Some
models may use a dual-function indicator light, which is also used
to indicate emission component service is due. After performing
required service, reset indicator light.

2007 Hummer H3

GENERAL INFORMATION Service Reminder Indicators - Hummer

2007 Hummer H3

GENERAL INFORMATION Service Reminder Indicators - Hummer

Fig. 1: Identifying Instrument Cluster (H2)
Courtesy of GENERAL MOTORS CORP.

2005-08 H2 & H3

1. Turn the ignition key to RUN position, with engine off.

2. Fully press and release the accelerator pedal slowly three times within five seconds. If the

OIL LIFE RESET message flashes for 10 seconds, the system is resetting.

3. Turn the key to LOCK position. If the CHANGE ENGINE OIL message comes back on

when engine is started, repeat reset procedure.

TIRE PRESSURE MONITOR SYSTEM

2006-08 H3

NOTE:

Before proceeding with the steps below, ensure that no other
sensor learn procedure is being performed simultaneously, or that
tire pressures are not being adjusted on a TPM equipped vehicle
within close proximity.

NOTE:

In the following procedure, a TPM Sensor Activation Tool (J-46079)
may be used in place of increasing/decreasing pressures to enable
sensor. To use, place activator antenna against the tire sidewall
close to the wheel rim at the valve stem location, then press and
release the ACTIVATE button.

2007 Hummer H3

GENERAL INFORMATION Service Reminder Indicators - Hummer

1. Turn ignition switch to ON position, with engine off. Apply parking brake.

2. Turn headlight switch from OFF to parking lamps 4 times within 4 seconds. A double horn

chirp will sound and the low tire pressure indicator will begin to flash to indicate the learn
mode has been enabled (the low tire pressure indicator should continue flashing throughout
the matching procedure, and "SERVICE TIRE MONITOR" message will be displayed on
the DIC).

3. Starting with left front tire, increase or decrease the pressure for 8-10 seconds, or until a

horn chirp sounds. Horn chirp may occur before the 8-10 second pressure increase/decrease
time period has been reached, or up to 30 seconds after the 8-10 second pressure
increase/decrease time period has been reached.

4. After horn chirp has sounded, proceed as in step 3 for the next 3 sensors in the following

order: right front, right rear and left rear.

5. After left rear sensor has been learned, check to see if the low tire pressure indicator is still

flashing. If it is, turn ignition switch to OFF position to exit relearn procedure. Adjust all
tire pressures to specification. If the low tire pressure indicator is not flashing, repeat
procedure from step 1.

2008 H2

NOTE:

If TPM Sensor Activation Tool (J-46079) is used, and vehicle is
having trouble entering relearn mode, check batteries in activation
tool. Low batteries may allow some functions to work, but not allow
vehicle to perform learn function. When the internal battery is fresh
(fully charged), the indicator is "full" or all dark. When the battery is
depleted, the indicator shows "empty" or all light.

NOTE:

If learn mode cannot be enabled, TPM system is not enabled in
BCM. See appropriate manufacturer service information.

WARNING:

Overinflating tires may cause personal injury or damage
to the tires and wheels. When increasing tire pressure,
do not exceed the maximum inflation pressure as noted
on the tire sidewall.

NOTE:

If a horn chirp does not sound after 35 seconds for any of the 4
sensors, turn ignition switch to OFF position to exit the learn
mode. Repeat procedure from step 1.

2007 Hummer H3

GENERAL INFORMATION Service Reminder Indicators - Hummer

Description & Operation

The TPM system uses the Instrument Panel Cluster (IPC), Body Control Module (BCM),
RCDLR, keyless entry transmitter, 4 Radio Frequency (RF) transmitting pressure sensors, and the
serial data circuit to perform the sensor learn mode functions. The sensor learn procedure must be
performed any time the RCDLR is replaced, a sensor is replaced, or after every tire rotation.
Once the learn mode has been enabled, each of the sensor's unique identification (ID) codes can
be learned into the RCDLR's memory. When a sensor's ID has been learned, the RCDLR sends a
serial data message to the BCM to sound a horn chirp. This verifies the sensor has transmitted its
ID and the RCDLR has received and learned it. The RCDLR must learn the sensor IDs in the
proper order to determine correct sensor location. The first learned ID is assigned to left front,
the second to right front, third to right rear and fourth to left rear.

Each sensor takes a pressure measurement sample once every 30 seconds while in stationary
mode. If the tire pressure increases or decreases by more than 1.2 psi (8.3 kPa) from the last
pressure measurement, another measurement will occur immediately to verify the change in
pressure. If a pressure change has indeed occurred, the sensor transmits a learn mode. When the
RCDLR receives a learn mode transmission while in sensor learn mode, it will assign that sensor's
ID to the location on the vehicle relative to the order in which it was learned.

The TPM system will cancel the learn mode if more then 2 minutes have passed and no sensors
have been learned, or if the ignition switch is turn to the OFF position. If the learn mode is
canceled before the first ID is learned, the RCDLR will remember all previously stored IDs and
their locations. As soon as the first sensor ID is learned, all other IDs are erased from the
RCDLR's memory. If the learn mode is canceled after the first ID is learned, the RCDLR will
store the IDs as invalid and the DIC will display dashes instead of tire pressures.

The learn mode can be enabled using either the keyless entry system, the Driver Information
Center (DIC), or a scan tool. See RELEARN PROCEDURE (USING KEYLESS ENTRY
SYSTEM),RELEARN PROCEDURE (USING SCAN TOOL) or RELEARN
PROCEDURE (USING DRIVER INFORMATION CENTER) .

NOTE:

Each turn signal will illuminate one at a time indicating which
location is to be learned next.

NOTE:

Before proceeding with the steps below, ensure that no other
sensor learn procedure is being performed simultaneously and that
no tire pressures are being adjusted on another TPM equipped
vehicle within close proximity.

2007 Hummer H3

GENERAL INFORMATION Service Reminder Indicators - Hummer