2009 GMC YUKON lane assist

Hill and Mountain Roads
Driving on steep hills or through mountains is different
than driving on at or rolling terrain. Tips for driving
in these conditions include:
Keep the vehicle serviced and in good shape.
Check all uid levels and brakes, tires, cooling
system, and transmission.
Going down steep or long hills, shift to a
lower gear.
{CAUTION:
If you do not shift down, the 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 the engine
assist the brakes on a steep downhill slope.
{CAUTION:
Coasting downhill in N (Neutral) or with the ignition
off is dangerous. The brakes will have to do all the
work of slowing down and 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 the engine running
and the vehicle in gear when going downhill.
Stay in your own lane. Do not swing wide or cut
across the center of the road. Drive at speeds
that let you stay in your own lane.
Top of hills: Be alert — something could be in your
lane (stalled car, accident).
Pay attention to special road signs (falling rocks
area, winding roads, long grades, passing or
no-passing zones) and take appropriate action.
SeeOff-Road Driving on page 4-12for information
about driving off-road.
4-28

Service (cont.)
California Proposition 65 Warning.................... 5-4
Doing Your Own Work................................... 5-4
Engine Soon Lamp......................................3-44
Publications Ordering Information...................7-15
Service, Scheduling Appointments.....................7-10
Servicing Your Airbag-Equipped Vehicle..............1-96
Setting the Clock............................................3-84
Sheet Metal Damage.....................................5-114
Shifting Into Park............................................2-44
Shifting Out of Park........................................2-45
Side Blind Zone Alert......................................2-56
Signals, Turn and Lane-Change.......................... 3-7
Snow Plow....................................................4-40
Spare Tire....................................................5-107
Installing....................................................5-94
Removing...................................................5-89
Storing.....................................................5-103
Specications, Capacities...............................5-123
Speedometer..................................................3-36
Split Bench Seat (60/40)..................................1-14
StabiliTrak
®Indicator Light...............................3-42
StabiliTrak®System.......................................... 4-6
Start Vehicle, Remote....................................... 2-7
Starting the Engine.........................................2-26
Steering.......................................................... 4-9
Steering Wheel Controls, Audio.......................3-136
Steering Wheel, Tilt Wheel................................. 3-6Steps
Power Assist...............................................2-17
Storage Areas
Center Console Storage Area........................2-75
Cupholders.................................................2-74
Glove Box..................................................2-74
Luggage Carrier..........................................2-75
Rear Seat Armrest.......................................2-76
Rear Storage Area.......................................2-76
Stuck in Sand, Mud, Ice, or Snow.....................4-31
Sun Visors.....................................................2-20
Sunroof.........................................................2-78
T
Tachometer....................................................3-36
Taillamps
Turn Signal, Stoplamps and
Back-up Lamps........................................5-58
Theft-Deterrent, Radio....................................3-136
Theft-Deterrent Systems...................................2-20
Content Theft-Deterrent................................2-21
PASS-Key
®III+ Electronic Immobilizer............2-22
PASS-Key®III+ Electronic Immobilizer
Operation................................................2-23
Third Row Seat..............................................1-27
Tilt Wheel........................................................ 3-6
Time, Setting..................................................3-84
12

Tire
Pressure Light.............................................3-43
Tires.............................................................5-62
Aluminum or Chrome-Plated Wheels,
Cleaning...............................................5-113
Buying New Tires........................................5-80
Chains.......................................................5-86
Changing a Flat Tire....................................5-88
Cleaning...................................................5-114
Different Size..............................................5-82
If a Tire Goes Flat.......................................5-87
Ination - Tire Pressure................................5-70
Inspection and Rotation................................5-78
Installing the Spare Tire................................5-94
Pressure Monitor Operation...........................5-74
Pressure Monitor System..............................5-72
Removing the Flat Tire.................................5-94
Removing the Spare Tire and Tools...............5-89
Secondary Latch System............................5-100
Spare Tire................................................5-107
Storing a Flat or Spare Tire and Tools..........5-103
Tire Sidewall Labeling..................................5-63
Tire Terminology and Denitions....................5-67
Uniform Tire Quality Grading.........................5-82
Wheel Alignment and Tire Balance.................5-84
Wheel Replacement.....................................5-84Tires (cont.)
When It Is Time for New Tires......................5-79
Tow/Haul Mode ...............................................2-35
Tow/Haul Mode Light.......................................3-49
Towing
Recreational Vehicle.....................................4-44
Towing a Trailer..........................................4-52
Your Vehicle...............................................4-44
Traction
StabiliTrak
®System....................................... 4-6
Trailer
Recommendations.......................................4-73
Transmission
Fluid, Automatic..................................5-21, 5-24
Transmission Operation, Automatic....................2-29
Trip Odometer................................................3-36
Turn and Lane-Change Signals.......................... 3-7
Turn Signal/Multifunction Lever........................... 3-7
U
Ultrasonic Rear Parking Assist (URPA)...............2-53
Uniform Tire Quality Grading............................5-82
Universal Home Remote System.......................2-68
Operation...................................................2-68
13