check engine GMC YUKON XL 2007 Workshop Manual

(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 449 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)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.(l)If you drive regularly under dusty conditions,
inspect the lter at each engine oil change.
(m)Visually inspect belt for fraying, excessive
cracks, or obvious damage. Replace belt if
necessary.
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 564.
At Each Fuel Fill
It is important to perform these underhood checks
at each fuel ll.
560

Engine Oil Level Check
Check the engine oil level and add the proper oil if
necessary. SeeEngine Oil on page 438for
further details.
Notice:It is important to check your oil
regularly and keep it at the proper level. Failure
to keep your engine oil at the proper level
can cause damage to your engine not covered
by your warranty.
Engine Coolant Level Check
Check the engine coolant level and add
DEX-COOL®coolant mixture if necessary. See
Engine Coolant on page 449for further details.
Windshield Washer Fluid Level Check
Check the windshield washer uid level in
the windshield washer uid reservoir and add the
proper uid if necessary.
At Least Once a Month
Tire Ination Check
Visually inspect your vehicle’s tires and make sure
they are inated to the correct pressures. Do not
forget to check the spare tire. SeeTires on
page 482for further details. Check to make sure
the spare tire is stored securely. SeeChanging a
Flat Tire on page 508.
Tire Wear Inspection
Tire rotation may be required for high mileage
highway drivers prior to the Engine Oil Life System
service notication. Check the tires for wear
and, if necessary, rotate the tires. SeeTire
Inspection and Rotation on page 497.
561

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 151.
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 151.
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.
562

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.
To check the PARK (P) mechanism’s holding
ability: With the engine running, shift to
PARK (P). Then release the parking brake
followed by the regular brake.
Contact your GM Goodwrench
®dealer if service is
required.
Underbody Flushing Service
At least every spring, use plain water to ush any
corrosive materials from the underbody. Take
care to clean thoroughly any areas where mud and
other debris can collect.
563

C
Calibration............................................157, 160
California Fuel.............................................. 429
California Proposition 65 Warning................. 427
Canadian Owners............................................ 3
Capacities and Specications....................... 548
Carbon Monoxide.................123, 125, 155, 405
Care of
Safety Belts.............................................. 531
Your CD and DVD Player......................... 337
Your CDs and DVDs................................. 336
Cargo Cover................................................ 176
Cargo Management System......................... 178
Center Console Storage Area....................... 175
Center Front Passenger Position,
Safety Belts................................................ 53
Center Seat................................................... 19
Chains, Tire................................................. 506
Charging System Light................................. 230
Check
Engine Light............................................. 236
Checking Things Under the Hood................. 434
Chemical Paint Spotting............................... 536
Child Restraints
Child Restraint Systems.............................. 68
Infants and Young Children......................... 64Child Restraints (cont.)
Lower Anchors and Tethers for Children..... 73
Older Children............................................ 61
Securing a Child Restraint in a
Rear Seat Position.................................. 83
Securing a Child Restraint in the
Center Front Seat Position...................... 85
Securing a Child Restraint in the
Right Front Seat Position........................ 86
Where to Put the Restraint......................... 72
Cigarette Lighter........................................... 209
Cleaning
Aluminum or Chrome-Plated Wheels......... 534
Exterior Lamps/Lenses.............................. 532
Fabric/Carpet............................................ 529
Finish Care............................................... 532
Inside of Your Vehicle............................... 528
Instrument Panel, Vinyl, and Other
Plastic Surfaces..................................... 531
Leather..................................................... 530
Tires......................................................... 535
Underbody Maintenance............................ 536
Washing Your Vehicle............................... 532
Weatherstrips............................................ 531
Windshield, Backglass, and
Wiper Blades......................................... 534
Climate Control System................................ 210
595

Driver Information Center (DIC).................... 244
DIC Operation and Displays..............244, 251
DIC Vehicle Customization........................ 264
DIC Warnings and Messages.................... 254
Driving
At Night.................................................... 373
City........................................................... 378
Defensive.................................................. 340
Drunken.................................................... 341
Freeway.................................................... 379
Hill and Mountain Roads........................... 382
In Rain and on Wet Roads....................... 375
Off-Road................................................... 356
Recovery Hooks....................................... 389
Rocking Your Vehicle to Get it Out........... 388
Winter....................................................... 384
Dual Automatic Climate Control System........ 213
DVD
Rear Seat Entertainment System.............. 321
E
Electrical System
Add-On Equipment.................................... 539
Center Instrument Panel Fuse Block......... 542
Fuses and Circuit Breakers....................... 540
Instrument Panel Fuse Block.................... 540Electrical System (cont.)
Power Windows and Other
Power Options....................................... 539
Underhood Fuse Block.............................. 543
Windshield Wiper Fuses............................ 539
Engine
Air Cleaner/Filter....................................... 443
Battery...................................................... 466
Check and Service Engine Soon Light...... 236
Coolant..................................................... 449
Coolant Heater.......................................... 140
Coolant Temperature Gage....................... 234
Drive Belt Routing..................................... 567
Engine Compartment Overview................. 436
Exhaust.................................................... 155
Fan Noise................................................. 460
Oil ............................................................ 438
Oil Life System......................................... 441
Overheated Protection Operating Mode....... 454
Overheating.............................................. 452
Starting..................................................... 138
Entry Lighting............................................... 204
Event Data Recorders (EDR)....................... 583
Exit Lighting................................................. 204
Extender, Safety Belt...................................... 60
Exterior Lamps............................................. 199
597

Oil
Engine...................................................... 438
Pressure Gage.......................................... 239
Pressure Light.......................................... 240
Oil, Engine Oil Life System.......................... 441
Older Children, Restraints.............................. 61
Online Owner Center................................... 574
OnStar
®System, see OnStar®Manual......... 167
Other Warning Devices................................ 188
Outlet Adjustment......................................... 220
Outlet(s), Accessory Power........................... 208
Outside
Automatic Dimming Mirror......................... 166
Convex Mirror........................................... 166
Curb View Assist Mirrors........................... 166
Heated Mirrors.......................................... 167
Manual Mirrors.......................................... 163
Power Foldaway Mirrors............................ 165
Power Mirrors........................................... 164
Trailer-Tow Mirrors.................................... 163
Overheated Engine Protection
Operating Mode........................................ 454
Owner Checks and Services........................ 560
Owners, Canadian........................................... 3
P
Paint, Damage............................................. 536
Park Aid....................................................... 205
Park (P)
Shifting Into.............................................. 152
Shifting Out of.......................................... 154
Parking
Assist....................................................... 205
Brake........................................................ 151
Over Things That Burn............................. 154
Passenger Airbag Status Indicator................ 228
Passenger Sensing System.......................... 100
Passing........................................................ 353
PASS-Key
®III+............................................ 134
PASS-Key®III+ Operation............................ 134
Power
Accessory Outlet(s)................................... 208
Door Locks............................................... 121
Electrical System...................................... 539
Liftgate..................................................... 125
Lumbar Controls......................................... 11
Retained Accessory (RAP)........................ 138
Running Boards........................................ 129
Seat........................................................... 10
602

Remote Keyless Entry System,
Operation.................................................. 113
Removing the Flat Tire and Installing
the Spare Tire........................................... 513
Removing the Spare Tire and Tools............. 509
Replacement Bulbs...................................... 481
Reporting Safety Defects
Canadian Government.............................. 589
General Motors......................................... 589
United States Government........................ 588
Restraint System Check
Checking the Restraint Systems................ 106
Replacing Restraint System Parts
After a Crash........................................ 107
Retained Accessory Power (RAP)................. 138
Right Front Passenger Position,
Safety Belts................................................ 52
Roadside
Assistance Program.................................. 577
Rocking Your Vehicle to Get it Out............... 388
Routing, Engine Drive Belt........................... 567
Running Boards, Power................................ 129
Running the Engine While Parked................ 156S
Safety Belt
Passenger Reminder Light........................ 227
Pretensioners.............................................. 60
Reminder Light......................................... 226
Safety Belts
Care of..................................................... 531
Center Front Passenger Position................. 53
Driver Position............................................ 44
How to Wear Safety Belts Properly............. 43
Questions and Answers About
Safety Belts............................................. 42
Rear Safety Belt Comfort Guides................ 56
Rear Seat Passengers................................ 54
Right Front Passenger Position................... 52
Safety Belt Extender................................... 60
Safety Belt Use During Pregnancy.............. 52
Safety Belts Are for Everyone..................... 38
Shoulder Belt Height Adjuster..................... 51
Safety Warnings and Symbols.......................... 4
Scheduled Maintenance............................... 555
Seats
60/40 Split Bench Seat............................... 20
Bucket Seats, Rear..................................... 26
Center Seat................................................ 19
604