2009 GMC ENVOY mirror

Driving with a Trailer
{CAUTION:
When towing a trailer, exhaust gases may collect
at the rear of the vehicle and enter if the liftgate,
trunk/hatch, or rear-most window is open.
Engine exhaust contains carbon monoxide (CO)
which cannot be seen or smelled. It can cause
unconsciousness and even death.
To maximize safety when towing a trailer:
Have the exhaust system inspected for leaks
and make necessary repairs before starting
a trip.
Never drive with the liftgate, trunk/hatch, or
rear-most window open.
Fully open the air outlets on or under the
instrument panel.
Adjust the Climate Control system to a setting
that brings in only outside air and set the fan
speed to the highest setting. See Climate
Control System in the Index.
For more information about carbon monoxide, see
Engine Exhaust on page 2-37.Towing a trailer requires a certain amount of experience.
Get to know the rig before setting out for the open road.
Get acquainted with the feel of handling and braking with
the added weight of the trailer. And always keep in mind
that the vehicle you are driving is now longer and not as
responsive as the vehicle is by itself.
Before starting, check all trailer hitch parts and
attachments, safety chains, electrical connectors, lamps,
tires and mirror adjustments. If the trailer has electric
brakes, start the vehicle and trailer moving and then
apply the trailer brake controller by hand to be sure the
brakes are working. This checks the electrical connection
at the same time.
During the trip, check occasionally to be sure that the
load is secure, and that the lamps and any trailer brakes
are still working.
Following Distance
Stay at least twice as far behind the vehicle ahead as
you would when driving the vehicle without a trailer.
This can help to avoid situations that require heavy
braking and sudden turns.
Passing
More passing distance is needed when towing a trailer.
Because the rig is longer, it is necessary to go much
farther beyond the passed vehicle before returning to
the lane.
4-53

Lighting
Entry.........................................................3-16
Exit ...........................................................3-17
Lights............................................................3-13
Flash-to-Pass............................................... 3-8
High/Low Beam Changer................................ 3-8
On Reminder..............................................3-14
Loading Your Vehicle.......................................4-31
Locking Rear Axle...........................................4-10
Lockout Protection..........................................2-11
Locks
Delayed Locking........................................... 2-8
Door ........................................................... 2-7
Lockout Protection.......................................2-11
Power Door .................................................. 2-8
Programmable Automatic Door Locks............... 2-9
Rear Door Security Locks.............................2-11
Loss of Control...............................................4-12
Low Fuel Warning Light...................................3-47
Lower Anchors and Tethers for Children.............1-43
Luggage Carrier..............................................2-52
Lumbar
Manual Controls............................................ 1-3
Power Controls............................................. 1-4M
Maintenance Schedule
Additional Required Services........................... 6-6
At Each Fuel Fill........................................... 6-9
At Least Once a Month.................................. 6-9
At Least Once a Year..................................6-10
Introduction.................................................. 6-2
Maintenance Footnotes.................................. 6-7
Maintenance Record....................................6-16
Maintenance Replacement Parts....................6-14
Maintenance Requirements............................. 6-2
Owner Checks and Services........................... 6-8
Recommended Fluids and Lubricants.............6-12
Scheduled Maintenance................................. 6-4
Using.......................................................... 6-2
Your Vehicle and the Environment................... 6-2
Malfunction Indicator Lamp...............................3-38
Manual Lumbar Controls.................................... 1-3
Manual Seats................................................... 1-2
Memory Seat................................................... 1-5
Message
DIC Warnings and Messages........................3-51
Mirrors
Automatic Dimming Rearview........................2-39
Manual Rearview Mirror................................2-39
Outside Convex Mirror.................................2-42
8

Mirrors (cont.)
Outside Heated Mirrors................................2-42
Outside Manual Mirrors................................2-41
Outside Power Mirrors..................................2-42
MP3 .............................................................3-80
MyGMLink.com................................................ 7-5
N
Navigation System, Privacy..............................7-18
Navigation/Radio System,
see Navigation Manual.................................3-86
New Vehicle Break-In......................................2-20
O
Odometer......................................................3-29
Odometer, Trip...............................................3-29
Off-Road Driving.............................................4-13
Off-Road Recovery..........................................4-12
Oil
Change Engine Oil Light...............................3-43
Engine.......................................................5-15
Pressure Gage............................................3-42
Oil, Engine Oil Life System..............................5-18
Older Children, Restraints................................1-32
Online Owner Center........................................ 7-5
OnStar, Privacy..............................................7-18
OnStar
®System, see OnStar®Manual...............2-43Operation, Universal Home Remote System........2-47
Outlet Adjustment............................................3-26
Outlets
Accessory Power.........................................3-18
Outside
Convex Mirror.............................................2-42
Heated Mirrors............................................2-42
Manual Mirrors............................................2-41
Power Mirrors.............................................2-42
Overhead Console..........................................2-51
Owner Checks and Services.............................. 6-8
Owners, Canadian............................................... ii
P
Paint, Damage..............................................5-110
Park
Shifting Into................................................2-34
Shifting Out of............................................2-36
Park Brake....................................................2-33
Parking
Over Things That Burn.................................2-36
Passenger Airbag Status Indicator.....................3-32
Passenger Sensing System..............................1-64
Passing.........................................................4-12
PASS-Key
®III+ Electronic Immobilizer...............2-18
PASS-Key®III+ Electronic Immobilizer
Operation...................................................2-18
Passlock
®......................................................2-17
9

Perchlorate Materials Requirements,
California..................................................... 5-4
Phone
Bluetooth
®..................................................3-86
Power
Door Locks.................................................. 2-8
Electrical System.......................................5-112
Lumbar Controls........................................... 1-4
Reduced Engine Light..................................3-44
Retained Accessory.....................................2-22
Seat ............................................................ 1-3
Steering Fluid.............................................5-33
Windows....................................................2-14
Privacy..........................................................7-16
Event Data Recorders..................................7-17
Navigation System.......................................7-18
OnStar .......................................................7-18
Radio Frequency Identication.......................7-18
Programmable Automatic Door Locks.................. 2-9
R
Radio Frequency Identication (RFID),
Privacy......................................................7-18
Radio(s)........................................................3-64
Radios
Navigation/Radio System,
see Navigation Manual..............................3-86
Rear Seat Audio........................................3-109Radios (cont.)
Reception.................................................3-111
Setting the Clock.........................................3-63
Theft-Deterrent..........................................3-110
Reading Lamps..............................................3-17
Rear Axle......................................................5-43
Locking......................................................4-10
Rear Climate Control System............................3-26
Rear Door Security Locks................................2-11
Rear Floor Storage Cover................................2-53
Rear Seat Audio (RSA)..................................3-109
Rear Seat Entertainment System.......................3-96
Rear Seat Operation.......................................1-11
Rear Windshield Washer/Wiper........................... 3-9
Rearview Mirror, Automatic Dimming..................2-39
Rearview Mirrors.............................................2-39
Reclining Seatbacks.......................................... 1-7
Recommended Fluids and Lubricants.................6-12
Recreational Vehicle Towing.............................4-38
Reduced Engine Power Light............................3-44
Remote Keyless Entry (RKE) System.................. 2-4
Remote Keyless Entry (RKE) System,
Operation..................................................... 2-5
Removing the Flat Tire and Installing the
Spare Tire..................................................5-92
Removing the Spare Tire and Tools...................5-89
Replacement Bulbs.........................................5-49
Replacement Parts, Maintenance......................6-14
10