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<TD height=52><FONT face="Arial, Helvetica, sans-serif">Oil Life System
Reset Procedures -- Trucks</FONT></TD>
<TD bgColor=#e3e3ff rowSpan=2>


<FONT face="Arial, Helvetica, sans-serif" size=2>Many GM cars and trucks are
equipped with an oil life system that determines when an oil change is required.
After the oil has been changed, it’s necessary to reset the
system.

Procedures for resetting 2001 through 2005 trucks are published
here. Passenger cars will be published next month.

The information for
this article is the same as you will find in the applicable owner or service
manual.

To find this information in 2001-4 eSI service manuals:
-
Select the vehicle
- Select category General Information
- Select category
Maintenance and Lubrication
- Select category Maintenance and then GM Oil
Life System-Resetting.

Beginning with 2005, this information will be
found only in owner manuals. To find this information in eSI owner manuals:
-
Select the vehicle
- Select Owner Manual
- Select Service and Appearance
Care
- Select Checking Under the Hood
- Select Description and
Operation
- Select Engine Oil Life System

<FONT
color=#ff0000>TIP:</FONT> You may be able to use the
Search function using the words Oil Life System
Resetting.

<FONT color=#ff0000>TIP:</FONT> You
can find copies of charts for earlier models on the TechLink website on the
Internet at http://service.gm.com. Look for the February and March 2000 issues
and May and June 2003 issues.

2001 - 05 Aztek
2002 - 05
Rendezvous
If the vehicle does not have the optional Driver
Information Center (DIC) do the following:
1. With the ignition key in ON but
the engine off, fully push and release the accelerator pedal slowly 3 times
within 5 seconds.
2. Turn the key to OFF.
3. If the CHANGE ENGINE OIL
message comes back on, the engine oil life monitor has not reset. Repeat the
procedure.

If the vehicle has the optional DIC, do the following:
1.
Turn the ignition to ON with the engine off.
2. Press the MODE button until
the DIC reads OIL LIFE LEFT/HOLD SET TO RESET.
3. Press and hold the SET
button until 100% is displayed.

You will hear three chimes and the CHANGE
ENGINE OIL message will go off. If the CHANGE ENGINE OIL message comes back on,
the monitor has not reset.
Repeat the procedure.

2001 - 05
Montana
2001 - 04 Silhouette
2001 - 05 Venture
2005 Terazza
2005
Uplander
2005 Montana SV6
2005 Relay
1. With the ignition key
in RUN but the engine off, repeatedly push the trip/reset button until OIL is
displayed on the Driver Information Center.
2. Once OIL is displayed, push
and hold the trip/reset button for five seconds. The number will disappear and
be replaced by 100 (indicating 100% oil life remaining).
3. Turn the key to
OFF.
4. If the change engine oil message comes back on, the engine oil life
monitor has not reset. Repeat the procedure.

2002 - 04
Bravada
2002 - 05 TrailBlazer
2002 - 04 Envoy
2004 - 05
Ranier
Without DIC
1. Turn the ignition key to RUN with the
engine off.
2. Fully press and release the accelerator pedal 3 times within 5
seconds.
3. If the CHANGE ENG OIL light flashes for five seconds, the system
is reset. If the light does not flash, repeat the procedure.

With
DIC
1. Press the fuel information button until ENGINE OIL LIFE appears in the
display.
2. To reset the monitor, press and hold the select button while
ENGINE OIL LIFE is displayed.

2004- 05 Canyon
2004- 05
Colorado
1. Turn the ignition to RUN but with the engine off.
2.
Press and release the reset button in the DIC until the Oil Life message is
displayed.
3. Once the alternating OlL Life and Reset messages appear on the
DIC display, press and hold the reset stem until several beeps sound. This
conforms the oil life system has been reset.
4. Turn the key to
Lock.

If the CHANGE/OIL message comes back on when you start the engine,
the engine oil life system has not reset. Repeat the
procedure.

2003- 05 SSR
1. Press the fuel
information button until ENGINE OIL LIFE appears in the display.
2. To reset
the Oil Life System, press and hold the select button while ENGINE OIL LIFE is
displayed.
3. If the light comes back on again when you start the engine, you
will need to reset the system again.

2005 Equinox
2001 - 05
Sierra (Exc. some fleets)
2002 - 05 Sierra Denali
2001 - 05 Silverado
(Exc. some fleets)
2001 - 05 Yukon and Yukon XL
2001 - 05 Tahoe and
Suburban
2001 - 05 Escalade
2002 - 05 Escalade EXT
2002 - 05
Avalanche
2001 - 05 Yukon Denali
2003 - 05 Hummer H2
2003 - 05 Express
(Exc. some fleets)
2003 - 05 Savana (Exc. some fleets)
1. Turn
the ignition to RUN but with the engine off.
2. Fully push and release the
accelerator pedal slowly 3 times within 5 seconds.
3. If the Change Oil Soon
light flashes, the system is resetting.
4. Turn the key to Lock.
5. Start
the engine.
6. If the Change Oil Soon light comes back on, the system has not
reset. Repeat the procedure.

2002- 05 Saturn Vue
1.
Turn the ignition to RUN but with the engine off.
2. Fully push and release
the accelerator pedal 3 times within 5 seconds.
3. If the Change Oil Soon
light flashes, the system is resetting. The light will flash for up to 30
seconds or until the ignition is turned to OFF.
4. Turn the key to OFF.
5.
Start the vehicle.
6. The oil life will change to 100%.
7. If the Change
Oil Soon light comes back on or stays on for 30 seconds at the next ignition
cycle, the system has not reset. Repeat the procedure.

2001 - 05
B7 Chassis Medium Duty
1. Turn the ignition to START but with the
engine off.
2. Fully press and release the accelerator pedal slowly 3 times
within 10 seconds.
3. If the CHANGE OIL light flashes for five seconds, the
system is reset.
4. If the light does not display for five seconds, you will
need to reset the system again.

2003 - 05 560
C-Series
All except with Caterpillar diesel:
1. Turn the ignition
to RUN but with the engine off.
2. Fully press and release the accelerator
pedal slowly 3 times within 10 seconds.
3. If the CHANGE OIL light flashes
for five seconds, the system is reset.
4.Turn the key to OFF.
5. If the
light comes back on again when you start the engine, you will need to reset the
system again.

All with Caterpillar diesel:
1. Turn
the ignition to RUN but with the engine off.
2. Fully apply and hold the
brake pedal while you fully press and release the accelerator pedal 3 times
within 5 seconds.
3. Turn the key to OFF.
4. If the light comes back on
again when you start the engine, you will need to reset the system
again.</FONT></P></TD></Table>