2007 GMC ENVOY maintenance

Bulb Replacement
................................ 430
Windshield Wiper Blade
Replacement
..................................... 436
Tires
..................................................... 439
Appearance Care
.................................. 482
Vehicle Identication
............................. 491
Electrical System
.................................. 492
Capacities and Specications
................ 502Maintenance Schedule
.............................. 503
Maintenance Schedule
.......................... 504
Customer Assistance Information
............. 525
Customer Assistance and
Information
........................................ 526
Reporting Safety Defects
...................... 544
Index
.......................................................... 547
2

Servicing Your Airbag-Equipped
Vehicle
Airbags affect how your vehicle should be
serviced. There are parts of the airbag system
in several places around your vehicle. You do not
want the system to inate while someone is
working on your vehicle. Your dealer and the
service manual have information about servicing
your vehicle and the airbag system. To purchase
a service manual, seeService Publications
Ordering Information on page 545.
{CAUTION:
For up to 10 seconds after the ignition
key is turned off and the battery is
disconnected, an airbag can still inate
during improper service. You can be
injured if you are close to an airbag when
it inates. Avoid yellow connectors. They
are probably part of the airbag system. Be
sure to follow proper service procedures,
and make sure the person performing
work for you is qualied to do so.
The airbag system does not need regular
maintenance.
88

Restraint System Check
Checking the Restraint Systems
Now and then, make sure the safety belt reminder
light and all your belts, buckles, latch plates,
retractors and anchorages are working properly.
Look for any other loose or damaged safety
belt system parts. If you see anything that might
keep a safety belt system from doing its job,
have it repaired. Keep safety belts clean and dry.
SeeCare of Safety Belts on page 485for more
information.
Torn or frayed safety belts may not protect you in
a crash. They can rip apart under impact forces.
If a belt is torn or frayed, get a new one right away.Also look for any opened or broken airbag
covers, and have them repaired or replaced.
The airbag system does not need regular
maintenance.
Notice:If you damage the covering for the
driver’s or the right front passenger’s airbag,
or the side impact airbag covering on the
ceiling near the side windows, the airbag may
not work properly. You may have to replace
the airbag module in the steering wheel, both
the airbag module and the instrument panel
for the right front passenger’s airbag, or
side impact airbag module and ceiling covering
for roof-mounted rollover airbags (if equipped).
Do not open or break the airbag coverings.
90

Malfunction Indicator Lamp
Check Engine Light
Your vehicle has a
computer which
monitors operation of
the fuel, ignition, and
emission control
systems.
This system is called OBD II (On-Board
Diagnostics-Second Generation) and is intended
to assure that emissions are at acceptable
levels for the life of the vehicle, helping to produce
a cleaner environment. The check engine light
comes on to indicate that there is a problem and
service is required. Malfunctions often will be
indicated by the system before any problem is
apparent. This may prevent more serious damage
to your vehicle. This system is also designed to
assist your service technician in correctly
diagnosing any malfunction.Notice:If you keep driving your vehicle
with this light on, after awhile, your emission
controls may not work as well, your fuel
economy may not be as good, and your engine
may not run as smoothly. This could lead to
costly repairs that may not be covered by your
warranty.
Notice:Modications made to the engine,
transmission, exhaust, intake, or fuel system
of your vehicle or the replacement of the
original tires with other than those of the same
Tire Performance Criteria (TPC) can affect
your vehicle’s emission controls and may
cause this light to come on. Modications to
these systems could lead to costly repairs not
covered by your warranty. This may also
result in a failure to pass a required Emission
Inspection/Maintenance test. SeeAccessories
and Modifications on page 380.
210

Did you just drive through a deep puddle of water?
If so, your electrical system may be wet. The
condition will usually be corrected when the
electrical system dries out. A few driving trips
should turn the light off.
Have you recently changed brands of fuel?
If so, be sure to fuel your vehicle with quality fuel.
SeeGasoline Octane on page 382. Poor fuel
quality will cause your engine not to run as
efficiently as designed. You may notice this as
stalling after start-up, stalling when you put
the vehicle into gear, misring, hesitation on
acceleration, or stumbling on acceleration. (These
conditions may go away once the engine is
warmed up.) This will be detected by the system
and cause the light to turn on.
If you experience one or more of these conditions,
change the fuel brand you use. It will require at
least one full tank of the proper fuel to turn the
light off.
If none of the above steps have made the light
turn off, your dealer can check the vehicle.
Your dealer has the proper test equipment and
diagnostic tools to x any mechanical or electrical
problems that may have developed.Emissions Inspection and
Maintenance Programs
Some state/provincial and local governments have
or may begin programs to inspect the emission
control equipment on your vehicle. Failure to pass
this inspection could prevent you from getting a
vehicle registration.
Here are some things you need to know to help
your vehicle pass an inspection:
Your vehicle will not pass this inspection if the
check engine light is on or not working properly.
Your vehicle will not pass this inspection if
the OBD (on-board diagnostic) system determines
that critical emission control systems have not
been completely diagnosed by the system.
The vehicle would be considered not ready for
inspection. This can happen if you have recently
replaced your battery or if your battery has
run down. The diagnostic system is designed to
evaluate critical emission control systems
during normal driving. This may take several days
of routine driving. If you have done this and
your vehicle still does not pass the inspection for
lack of OBD system readiness, your dealer
can prepare the vehicle for inspection.
212

Oil Pressure Gage
The oil pressure gage shows the engine oil
pressure in psi (pounds per square inch) when the
engine is running. Canadian vehicles indicate
pressure in kPa (kilopascals).
{CAUTION:
Do not keep driving if the oil pressure is
low. If you do, your engine can become so
hot that it catches re. You or others could
be burned. Check your oil as soon as
possible and have your vehicle serviced.
Notice:Lack of proper engine oil maintenance
may damage the engine. The repairs would
not be covered by your warranty. Always follow
the maintenance schedule in this manual for
changing engine oil.
Oil pressure may vary with engine speed, outside
temperature and oil viscosity, but readings
above the low pressure zone indicate the normal
operating range.
A reading in the low pressure zone may be
caused by a dangerously low oil level or other
problems causing low oil pressure.
United StatesCanada
213

Change Engine Oil Light
Your vehicle may
have a change
engine oil light.
When this light comes on it means that an oil
change and other maintenance procedures
are required for your vehicle.
SeeScheduled Maintenance on page 507and
Engine Oil on page 394for more information.
Once the engine oil has been changed, the change
engine oil light must be reset. Until it is reset,
the light will stay on when the engine is on.
Security Light
This light will come on
briey when you turn
the key toward START.
The light will stay on until the engine starts. If the
light ashes, the Passlock
®system has entered
a tamper mode. If the vehicle fails to start,
seePasslock
®on page 111.
If the light comes on continuously while driving
and stays on, there may be a problem with
the Passlock
®system. Your vehicle will not be
protected by Passlock®, and you should see
your dealer.
Also, seeContent Theft-Deterrent on page 110for
additional information regarding the security light.
214

The fuel economy data used to determine fuel
range is an average of recent driving conditions.
As your driving conditions change, this data is
gradually updated. Fuel range cannot be reset.
Fuel Used:Press the fuel information button until
FUEL USED appears on the display. This mode
shows the number of gallons or liters of fuel used
since the last reset of this menu item. To reset
the fuel used information, press and hold the select
button for one second while FUEL USED is
displayed.
Average Fuel Economy:Press the fuel
information button until AVG. ECON appears on
the display. This mode shows how many miles per
gallon (MPG), liters per 100 kilometers (L/100 km),
or kilometers per liter (km/L) your vehicle is
getting based on current and past driving
conditions.
Press and hold the select button for one second
while AVG. ECON is displayed to reset the
average fuel economy. Average fuel economy will
then be calculated starting from that point.
If the average fuel economy is not reset, it will be
continually updated each time you drive.Engine Oil Life System:Press the fuel
information button until ENGINE OIL LIFE appears
on the display. The engine oil life system shows
an estimate of the oil’s remaining useful life. It will
show 100% when the system is reset after an
oil change. It will alert you to change your oil on a
schedule consistent with your driving conditions.
Always reset the engine oil life system after an oil
change. To reset the engine oil life system, see
Engine Oil Life System on page 398.
In addition to the engine oil life system monitoring
the oil life, additional maintenance is
recommended in the Maintenance Schedule in this
manual. SeeEngine Oil on page 394and
Scheduled Maintenance on page 507.
Customization Button
4
(Customization):Press the customization
button to access the VEHICLE SETTINGS menu
and customize the settings to your vehicle.
SeeDIC Vehicle Customization on page 229for
more information.
221