2004 GMC ENVOY lane assist

Outside Convex Mirror
A convex mirror’s surface is curved so you can see
more from the driver’s seat.
{CAUTION:
A convex mirror can make things (like other
vehicles) look farther away than they really are.
If you cut too sharply into the right or left lane,
you could hit a vehicle. Check your inside
mirror or glance over your shoulder before
changing lanes.
Outside Heated Mirrors
Your vehicle may have this feature.
When you operate the rear window defogger, a defogger
also warms the heated driver’s and passenger’s
outside rearview mirrors to help clear them of ice, snow
and condensation.
Outside Automatic Dimming Mirror
with Curb View Assist
If your vehicle has this feature, the driver’s and/or
passenger’s outside mirror will adjust to a preset tilt
position while the vehicle is in REVERSE (R) gear.
Curb view assist may be useful when you are parallel
parking. The mirror(s) will return to normal position when
the vehicle is shifted out of REVERSE (R) gear.
Automatic mirror movement in either direction will follow
a short delay.
To change the tilt position, adjust the mirror while the
vehicle is in REVERSE (R) gear with the engine running,
the parking brake engaged and the brake pedal
pressed. The new position will be saved into memory
once the vehicle is shifted out of REVERSE (R).
You may be able to enable/disable this feature through
the Driver Information Center (DIC). See “Mirror
Curb View Assist” underDIC Operation and Displays on
page 3-50.
2-39

Keep your vehicle in good shape. Check all uid
levels and also the brakes, tires, cooling system
and transmission. These parts can work hard
on mountain roads.
Know how to go down hills. The most important
thing to know is this: let your engine do some of
the slowing down. Shift to a lower gear when you go
down a steep or long hill.
{CAUTION:
If you do not shift down, your brakes could get
so hot that they would not work well. You
would then have poor braking or even none
going down a hill. You could crash. Shift down
to let your engine assist your brakes on a
steep downhill slope.
{CAUTION:
Coasting downhill in NEUTRAL (N) or with the
ignition off is dangerous. Your brakes will have
to do all the work of slowing down. They could
get so hot that they would not work well. You
would then have poor braking or even none
going down a hill. You could crash. Always
have your engine running and your vehicle in
gear when you go downhill.
Know how to go uphill. You may want to shift down to
a lower gear. The lower gears help cool your engine
and transmission, and you can climb the hill better.
Stay in your own lane when driving on two-lane
roads in hills or mountains. Do not swing wide or cut
across the center of the road. Drive at speeds that let
you stay in your own lane.
As you go over the top of a hill, be alert. There could
be something in your lane, like a stalled car or an
accident.
You may see highway signs on mountains that warn
of special problems. Examples are long grades,
passing or no-passing zones, a falling rocks area or
winding roads. Be alert to these and take appropriate
action.
4-37

Towing
Recreational Vehicle.....................................4-44
Towing a Trailer..........................................4-55
Your Vehicle...............................................4-43
Traction
Assist System (TAS)...................................... 4-8
Trailer Brakes.................................................4-60
Trailer Wiring Harness.....................................4-66
Transfer Case................................................5-50
Transmission
Fluid, Automatic...........................................5-22
Transmission Operation, Automatic....................2-24
Transmission, Transaxle, Transfer Case Unit
Repair Manual............................................7-12
Transportation Options...................................... 7-8
Travel Note Recorder......................................2-46
Traveling to Remote Areas...............................4-17
Trip Information..............................................3-51
Trip Odometer................................................3-34
Turn and Lane Change Signals.......................... 3-8
TURN SIGNAL ON.........................................3-60
Turn Signal/Multifunction Lever........................... 3-7
Turn Signals When Towing a Trailer..................4-63
Two-Wheel-Drive Vehicles................................4-45U
Understanding Radio Reception.......................3-117
Uniform Tire Quality Grading............................5-69
United States................................................... 7-4
Used Replacement Wheels..............................5-72
Using Cleaner on Fabric..................................5-92
Using HomeLink
®...........................................2-44
Using Song List Mode...................................3-101
V
Vehicle
Control........................................................ 4-5
Damage Warnings........................................... iv
Loading......................................................4-48
Symbols......................................................... iv
Vehicle Data Collection and Event Data Records....7-10
Vehicle Identication
Number (VIN).............................................5-99
Service Parts Identication Label..................5-100
Vehicle Personalization
Memory Seat..............................................2-52
16