2007 GMC YUKON XL DENALI automatic transmission

(g)Inspect system. Check all fuel and vapor
lines and hoses for proper hook-up, routing, and
condition. Check that the purge valve works
properly, if equipped. Replace as needed.
(h)Change automatic transmission uid and lter
if the vehicle is mainly driven under one or
more of these conditions:
In heavy city traffic where the outside
temperature regularly reaches 90°F (32°C)
or higher.
In hilly or mountainous terrain.
When doing frequent trailer towing.
Uses such as found in taxi, police, or delivery
service.
(i)Drain, ush, and rell cooling system. This
service can be complex; you should have
your dealer perform this service. See Engine
Coolant on page 445 for what to use. Inspect
hoses. Clean radiator, condenser, pressure
cap, and ller neck. Pressure test the cooling
system and pressure cap.(j)A uid loss in any vehicle system could indicate
a problem. Have the system inspected and
repaired and the uid level checked. Add uid if
needed.
(k)If you drive regularly under dusty conditions,
inspect the lter at each engine oil change.
(l)Visually inspect belt for fraying, excessive
cracks, or obvious damage. Replace belt if
necessary.
(m)Check vent hose at transfer case for kinks
and proper installation.
Owner Checks and Services
These owner checks and services should be
performed at the intervals specied to help
ensure the safety, dependability, and emission
control performance of your vehicle. Your
GM Goodwrench
®dealer can assist you with
these checks and services.
Be sure any necessary repairs are completed at
once. Whenever any uids or lubricants are added
to your vehicle, make sure they are the proper
ones, as shown inRecommended Fluids and
Lubricants on page 561.
557

At Least Once a Year
Starter Switch Check
{CAUTION:
When you are doing this inspection, the
vehicle could move suddenly. If the vehicle
moves, you or others could be injured.
1. Before you start, be sure you have enough
room around the vehicle.
2. Firmly apply both the parking brake and
the regular brake. SeeParking Brake
on page 152.
Do not use the accelerator pedal, and be
ready to turn off the engine immediately
if it starts.
3. Try to start the engine in each gear.
The vehicle should start only in PARK (P)
or NEUTRAL (N). If the vehicle starts
in any other position, contact your
GM Goodwrench
®dealer for service.
Automatic Transmission Shift Lock
Control System Check
{CAUTION:
When you are doing this inspection, the
vehicle could move suddenly. If the vehicle
moves, you or others could be injured.
1. Before you start, be sure you have enough
room around the vehicle. It should be parked
on a level surface.
2. Firmly apply the parking brake. SeeParking
Brake on page 152.
Be ready to apply the regular brake
immediately if the vehicle begins to move.
3. With the engine off, turn the ignition to RUN,
but do not start the engine. Without applying
the regular brake, try to move the shift
lever out of PARK (P) with normal effort. If the
shift lever moves out of PARK (P), contact
your GM Goodwrench
®dealer for service.
559

Ignition Transmission Lock Check
While parked, and with the parking brake set, try
to turn the ignition to LOCK in each shift lever
position.
The ignition should turn to LOCK only when
the shift lever is in PARK (P).
The key should come out only in LOCK.
Contact your GM Goodwrench
®dealer if service is
required.
Parking Brake and Automatic Transmission
Park (P) Mechanism Check
{CAUTION:
When you are doing this check, your
vehicle could begin to move. You or others
could be injured and property could be
damaged. Make sure there is room in front
of your vehicle in case it begins to roll.
Be ready to apply the regular brake at
once should the vehicle begin to move.
Park on a fairly steep hill, with the vehicle facing
downhill. Keeping your foot on the regular
brake, set the parking brake.
To check the parking brake’s holding ability:
With the engine running and transmission in
NEUTRAL (N), slowly remove foot pressure
from the regular brake pedal. Do this until the
vehicle is held by the parking brake only.
560

Usage Fluid/Lubricant
Power Steering
SystemGM Power Steering Fluid
(GM Part No. U.S. 89021184,
in Canada 89021186).
Automatic
TransmissionDEXRON
®-VI Automatic
Transmission Fluid.
Key Lock
CylindersMulti-Purpose Lubricant, Superlube
(GM Part No. U.S. 12346241,
in Canada 10953474).
Chassis
LubricationChassis Lubricant
(GM Part No. U.S. 12377985,
in Canada 88901242) or lubricant
meeting requirements of NLGI #2,
Category LB or GC-LB.
Front and
Rear AxleSAE 75W-90 Synthetic
Axle Lubricant
(GM Part No. U.S. 12378261,
in Canada 10953455) meeting
GM Specication 9986115.
Transfer CaseManual Transmission Fluid
(GM Part No. U.S. 88861800,
in Canada 88861801).
Front Axle
Propshaft
SplineSpline Lubricant, Special Lubricant
(GM Part No. U.S. 12345879,
in Canada 10953511) or lubricant
meeting requirements of
GM 9985830.
Usage Fluid/Lubricant
Hood HingesMulti-Purpose Lubricant, Superlube
(GM Part No. U.S. 12346241,
in Canada 10953474).
Body Door
Hinge Pins,
Tailgate Hinge
and Linkage,
Folding Seats,
and Fuel Door
HingeMulti-Purpose Lubricant, Superlube
(GM Part No. U.S. 12346241,
in Canada 10953474).
Outer Tailgate
Handle Pivot
PointsMulti-Purpose Lubricant, Superlube
(GM Part No. U.S. 12346241,
in Canada 10953474).
Weatherstrip
ConditioningWeatherstrip Lubricant
(GM Part No. U.S. 3634770,
in Canada 10953518) or
Dielectric Silicone Grease
(GM Part No. U.S. 12345579,
in Canada 992887).
Weatherstrip
SqueaksSynthetic Grease with
Teon, Superlube
(GM Part No. U.S. 12371287,
in Canada 10953437).
562

Appearance Care (cont.)
Leather.................................................... 529
Sheet Metal Damage............................... 533
Speaker Covers....................................... 530
Tires........................................................ 533
Underbody Maintenance........................... 534
Vehicle Care/Appearance Materials.......... 535
Washing Your Vehicle.............................. 530
Weatherstrips........................................... 530
Windshield, Backglass, and Wiper
Blades.................................................. 532
Wood Panels........................................... 530
Ashtray(s).................................................... 214
Audio System(s).......................................... 272
Audio Steering Wheel Controls................. 335
Care of Your CD and DVD Player............ 338
Care of Your CDs and DVDs................... 338
Navigation/Radio System, see Navigation
Manual................................................. 321
Radio with CD and DVD.......................... 294
Radio with Six-Disc CD............................ 276
Rear Seat Audio (RSA)............................ 333
Rear Side Window Antenna..................... 338
Setting the Time..............................274, 275
Theft-Deterrent Feature............................ 335Audio System(s) (cont.)
Understanding Radio Reception............... 336
XM™ Satellite Radio Antenna System...... 339
Automatic Headlamp System....................... 205
Automatic Transmission
Fluid........................................................ 440
Operation................................................. 145
Autoride
®..................................................... 399
B
Battery........................................................ 463
Run-Down Protection............................... 208
Before Leaving on a Long Trip.................... 382
Bench Seat, Split (60/40).............................. 18
Brake
Anti-Lock Brake System (ABS)................. 347
Emergencies............................................ 349
Parking.................................................... 152
System Warning Light.............................. 233
Brake Pedal, Throttle................................... 143
Brakes........................................................ 459
Braking....................................................... 346
Braking in Emergencies............................... 349
Break-In, New Vehicle................................. 139
594

Engine
Air Cleaner/Filter...................................... 437
Battery..................................................... 463
Check and Service Engine Soon Light..... 237
Coolant.................................................... 445
Coolant Heater......................................... 144
Coolant Temperature Gage...................... 236
Drive Belt Routing.................................... 564
Engine Compartment Overview................ 430
Exhaust................................................... 156
Fan Noise................................................ 456
Oil ........................................................... 432
Oil Life System........................................ 435
Overheated Protection Operating Mode.... 450
Overheating............................................. 448
Starting.................................................... 141
Entry Lighting.............................................. 207
Event Data Recorders (EDR)...................... 582
Exit Lighting................................................ 207
Extender, Safety Belt..................................... 60
Exterior Lamps............................................ 203F
Filter
Engine Air Cleaner................................... 437
Finish Damage............................................ 534
Flashers, Hazard Warning........................... 192
Flash-to-Pass.............................................. 195
Flat Tire...................................................... 505
Flat Tire, Changing...................................... 506
Flat Tire, Storing......................................... 522
Fluid
Automatic Transmission............................ 440
Power Steering........................................ 457
Windshield Washer.................................. 458
Fog Lamp Light........................................... 242
Fog Lamps.................................................. 206
Front Axle................................................... 471
Front Reading Lamps.................................. 208
Fuel............................................................ 423
Additives.................................................. 424
California Fuel.......................................... 424
Filling a Portable Fuel Container.............. 428
Filling Your Tank...................................... 426
Fuels in Foreign Countries....................... 425
Gage....................................................... 243
Gasoline Octane...................................... 423
598

Transmission
Fluid, Automatic....................................... 440
Transmission Operation, Automatic.............. 145
Trip Odometer............................................. 227
Turn and Lane-Change Signals................... 194
Turn Signal/Multifunction Lever.................... 193
U
Ultrasonic Rear Parking Assist (URPA)........ 208
Understanding Radio Reception................... 336
Uniform Tire Quality Grading....................... 501
Universal Home Remote System........166, 167
Operation........................................168, 174
V
Vehicle
Control..................................................... 346
Damage Warnings....................................... 5
Loading.................................................... 392
Symbols...................................................... 5
Vehicle Customization, DIC......................... 262Vehicle Data Collection and Event Data
Recorders................................................ 582
Vehicle Identication
Number (VIN).......................................... 536
Service Parts Identication Label.............. 536
Ventilation Adjustment.................................. 222
Visors.......................................................... 134
Voltmeter Gage........................................... 232
W
Warning Lights, Gages and Indicators......... 225
Warnings
DIC Warnings and Messages................... 252
Hazard Warning Flashers......................... 192
Other Warning Devices............................ 192
Safety and Symbols..................................... 4
Vehicle Damage.......................................... 5
Wheels
Alignment and Tire Balance..................... 502
Different Size........................................... 500
Replacement............................................ 503
Where to Put the Restraint............................ 72
607