2007 GMC ENVOY charging

Instrument Panel Overview........................ 168
Hazard Warning Flashers.......................... 170
Other Warning Devices............................. 170
Horn.......................................................... 170
Tilt Wheel.................................................. 171
Turn Signal/Multifunction Lever.................. 171
Turn and Lane-Change Signals................. 172
Headlamp High/Low-Beam Changer.......... 173
Flash-to-Pass............................................ 173
Windshield Wipers..................................... 173
Windshield Washer.................................... 174
Rear Window Wiper/Washer...................... 174
Headlamp Washer..................................... 175
Cruise Control........................................... 176
Headlamps................................................ 179
Headlamps on Reminder........................... 180
Daytime Running Lamps (DRL)................. 180
Automatic Headlamp System..................... 181
Fog Lamps................................................ 182
Instrument Panel Brightness...................... 182
Dome Lamps............................................. 182
Dome Lamp Override................................ 183
Entry Lighting............................................ 183
Exit Lighting.............................................. 183Reading Lamps......................................... 183
Electric Power Management...................... 184
Battery Run-Down Protection..................... 185
Accessory Power Outlet(s)........................ 185
Ashtray(s) and Cigarette Lighter................ 186
Climate Controls......................................... 186
Dual Climate Control System..................... 186
Dual Automatic Climate Control System.... 189
Outlet Adjustment...................................... 194
Rear Climate Control System.................... 195
Warning Lights, Gages, and Indicators..... 197
Instrument Panel Cluster........................... 198
Speedometer and Odometer...................... 199
Trip Odometer........................................... 199
Tachometer............................................... 199
Safety Belt Reminder Light........................ 200
Passenger Safety Belt Reminder Light....... 200
Airbag Readiness Light............................. 201
Passenger Airbag Status Indicator............. 202
Charging System Light.............................. 205
Voltmeter Gage......................................... 205
Brake System Warning Light..................... 206
Anti-Lock Brake System Warning Light...... 207
Section 3 Instrument Panel
165

Electric Power Management
This vehicle has Electric Power
Management (EPM), an advanced control
system. It estimates the battery’s temperature
and state of charge and then adjusts the voltage
for best performance and extended life of
the battery.
When the battery’s state of charge is low, the
voltage is raised slightly to quickly put the charge
back in. When the state of charge is high, the
voltage is lowered slightly to prevent overcharging.
If the vehicle has a voltmeter gage, you may
see the voltage move up or down. This is normal.
If there is a problem, an alert will be displayed.
The battery can be discharged at idle if the
electrical loads are very high. This is true for all
vehicles. This is because the generator (alternator)
may not be spinning fast enough at idle to
produce all the power that is needed for very high
electrical loads.A high electrical load occurs when several of the
following loads are on: headlamps, high beams,
fog lamps, rear window defogger, climate
control fan at high speed, heated seats, engine
cooling fans, trailer loads, and loads plugged into
accessory power outlets.
EPM works to prevent excessive discharge of the
battery. It does this by balancing the generator’s
output and the vehicle’s electrical needs. It
can increase engine idle speed to generate more
power, whenever needed. It can temporarily
reduce the power demands of some accessories.
Normally, these actions occur in steps or levels,
without being noticeable. In rare cases at the
highest levels of corrective action, this action may
be noticeable to the driver. If so, a Driver
Information Center (DIC) message might be
displayed, such as Battery Saver Active or Battery
Voltage Low. If this message is displayed, it is
recommended that the driver reduce the electrical
loads as much as possible. SeeDIC Warnings
and Messages on page 222.
184

Charging System Light
The charging system
light will come on briey
when you turn on the
ignition, but the
engine is not running,
as a check to show you
it is working.
It should go out once the engine is running. If it
stays on, or comes on while you are driving,
you may have a problem with the charging system.
It could indicate that you have problems with a
generator drive belt, or another electrical problem.
Have it checked right away. Driving while this
light is on could drain your battery.
If you must drive a short distance with the light on,
be certain to turn off all your accessories, such
as the radio and air conditioner.
Voltmeter Gage
When your engine is not
running, but the ignition
is in RUN, this gage
displays the battery
voltage in DC volts.
When the engine is running, the gage shows the
condition of the charging system. The gage
may transition from a higher to lower or a lower to
higher reading, this is normal. Readings between
the low and high warning zones indicate the
normal operating range. The voltmeter gage may
also read lower when in fuel economy mode.
This is normal.
205

Readings in the low warning zone may occur
when a large number of electrical accessories are
operating in the vehicle and the engine is left
idling for an extended period. This condition
is normal since the charging system is not able to
provide full power at engine idle. As engine
speeds are increased, this condition should correct
itself as higher engine speeds allow the charging
system to create maximum power.
You can only drive for a short time with the
reading in either warning zone. If you must drive,
turn off all unnecessary accessories.
Readings in either warning zone indicate a
possible problem in the electrical system. Have
the vehicle serviced as soon as possible.
Brake System Warning Light
When the ignition is on, the brake system warning
light will come on when you set your parking
brake. The light will stay on if your parking brake
does not release fully. If it stays on after your
parking brake is fully released, it means your
vehicle has a brake problem. A chime may also
sound when the light comes on.Your vehicle’s hydraulic brake system is divided
into two parts. If one part is not working, the other
part can still work and stop you. For good
braking, though, you need both parts working well.
If the warning light comes on, there could be a
brake problem. Have your brake system inspected
right away.
This light should come on briey when you turn
the ignition key to RUN. If it does not come
on then, have it xed so it will be ready to warn
you if there is a problem.
If the light comes on while you are driving, pull off
the road and stop carefully. You may notice that the
pedal is harder to push or the pedal may go closer
to the oor. It may take longer to stop. If the light is
still on, have the vehicle towed for service. See
Towing Your Vehicle on page 354.
United StatesCanada
206

SERVICE AIR BAG
This message displays if there is a problem with
the airbag system. Have your dealer inspect
the system for problems. SeeAirbag Readiness
Light on page 201andAirbag System on page 71
for more information. Press any of the DIC
buttons, or the trip stem, to acknowledge this
message and clear it from the DIC display.
SERVICE BRAKE SYSTEM
This message displays if a problem occurs with
the brake system. If this message appears, stop as
soon as possible and turn off the vehicle. Restart
the vehicle and check for the message on the
DIC display. If the message is still displayed, or
appears again when you begin driving, the
brake system needs service. See your dealer.
SERVICE CHARGING SYS (System)
This message displays if there is a problem with the
battery charging system. Under certain conditions,
the charging system light may also turn on in the
instrument panel cluster. SeeCharging System
Light on page 205. The battery will not be charging
at an optimal rate and the vehicle will lose the ability
to enter the fuel economy mode. The vehicle is safe
to drive, however you should have the electrical
system checked by your dealer. Press any of the
DIC buttons, or the trip stem, to acknowledge this
message and clear it from the DIC display.
SERVICE STABILITRAK
If this message displays, it means there may be a
problem with the StabiliTrak®system. If this
message appears, try to reset the system by
performing the following: stop; turn off the engine;
then start the engine again. If this message still
comes on, it means there is a problem. You should
see your dealer for service. The vehicle is safe to
drive, however, you do not have the benet of
StabiliTrak
®, so reduce your speed and drive
accordingly. Press any of the DIC buttons, or the
trip stem, to acknowledge this message and clear it
from the DIC display.
226

Trailer Wiring Harness
Your vehicle may be equipped with the seven-wire
trailer towing harness. This harness has a
seven-pin universal heavy-duty trailer connector
(if equipped with the trailering package) that is
attached to a bracket on the hitch platform. If your
vehicle is not equipped with the heavy-duty trailer
connector, you may purchase one from your dealer.The seven-wire harness contains the following
trailer circuits:
Yellow: Left Stop/Turn Signal
Dark Green: Right Stop/Turn Signal
Brown: Running Lamps
White: Ground
Light Green: Back-up Lamps
Red: Battery Feed
Dark Blue: Electric Brakes
If you need to tow a light-duty trailer with a
standard four-way round pin connector, an adapter
connector is available from your dealer.
If you are charging a remote (non-vehicle) battery,
turn on the headlamps to boost the vehicle
system voltage and properly charge the battery.
Your vehicle may also be equipped with wiring for
an electric trailer brake controller. These wires
are located inside the vehicle on the driver’s side
under the instrument panel. These wires should
be connected to an electric trailer brake controller
by your dealer or a qualied service center.
375

C
Calibration........................134, 136, 138, 140
California Fuel............................................. 383
California Proposition 65 Warning................ 381
Canadian Owners........................................... 3
Capacities and Specications...................... 502
Carbon Monoxide..............106, 131, 344, 362
Care of
Safety Belts............................................. 485
Your CD and DVD Player........................ 299
Your CDs and DVDs................................ 299
Cargo Cover............................................... 163
Cargo Tie Downs........................................ 164
CD, MP3 ..................................................... 271
Center Console Storage Area...................... 160
Chains, Tire................................................. 461
Charging System Light................................ 205
Check
Engine Light............................................ 210
Gages Warning Light............................... 216
Check Gas Cap Light.................................. 217
Checking Things Under the Hood................ 388
Chemical Paint Spotting.............................. 489Child Restraints
Child Restraint Systems............................. 49
Infants and Young Children........................ 45
Lower Anchors and Tethers for Children..... 56
Older Children........................................... 42
Securing a Child Restraint in a Rear
Outside Seat Position............................. 63
Securing a Child Restraint in the Center
Rear Seat Position................................. 66
Securing a Child Restraint in the Right
Front Seat Position................................. 66
Where to Put the Restraint........................ 54
Chime Level Adjustment .............................. 300
Cigarette Lighter.......................................... 186
Cleaning
Aluminum Wheels.................................... 488
Exterior Lamps/Lenses............................. 486
Fabric/Carpet........................................... 483
Finish Care.............................................. 486
Inside of Your Vehicle .............................. 482
Instrument Panel, Vinyl, and Other Plastic
Surfaces............................................... 485
Leather.................................................... 484
Tires........................................................ 488
Underbody Maintenance........................... 489
Washing Your Vehicle .............................. 486
549

I
Ignition Positions......................................... 113
Infants and Young Children, Restraints.......... 45
Ination - Tire Pressure............................... 447
Instrument Panel
Overview.................................................. 168
Instrument Panel (I/P)
Brightness................................................ 182
Cluster..................................................... 198
J
Jump Starting.............................................. 423
K
Keyless Entry System................................... 97
Keys............................................................. 95
L
Labeling, Tire Sidewall................................. 440
Lamps
Battery Run-Down Protection................... 185
Dome....................................................... 182
Dome Lamp Override............................... 183Lamps (cont.)
Electric Power Management..................... 184
Fog .......................................................... 182
Reading................................................... 183
LATCH System
Child Restraints......................................... 56
License Plate Lamps................................... 435
Liftgate/Liftglass........................................... 106
Liftglass/Liftgate........................................... 106
Light
Airbag Readiness..................................... 201
Anti-Lock Brake System Warning............. 207
Brake System Warning............................. 206
Change Engine Oil................................... 214
Charging System..................................... 205
Check Gages Warning............................. 216
Check Gas Cap....................................... 217
Cruise Control.......................................... 215
Gate Ajar................................................. 216
Highbeam On.......................................... 215
Low Fuel Warning.................................... 217
Malfunction Indicator................................ 210
Passenger Airbag Status Indicator............ 202
Passenger Safety Belt Reminder.............. 200
Reduced Engine Power............................ 215
Safety Belt Reminder............................... 200
Security................................................... 214
554