heating GMC YUKON XL 2007 Owner's Manual

Engine Overheating
You will nd a coolant temperature gage on your
vehicle’s instrument panel. SeeEngine Coolant
Temperature Gage on page 234.
In addition, you will nd an ENGINE
OVERHEATED STOP ENGINE, ENGINE
OVERHEATED IDLE ENGINE, and an ENGINE
POWER IS REDUCED message in the Driver
Information Center (DIC) on the instrument panel.
SeeDIC Warnings and Messages on page 254.
If Steam Is Coming From Your Engine
{CAUTION:
Steam from an overheated engine can
burn you badly, even if you just open the
hood. Stay away from the engine if you
see or hear steam coming from it. Just
turn it off and get everyone away from the
vehicle until it cools down.
CAUTION: (Continued)
CAUTION: (Continued)
Wait until there is no sign of steam or
coolant before you open the hood.
If you keep driving when your engine is
overheated, the liquids in it can catch re.
You or others could be badly burned.
Stop your engine if it overheats, and get
out of the vehicle until the engine is cool.
SeeOverheated Engine Protection
Operating Mode on page 454for
information on driving to a safe place in
an emergency.
Notice:If your engine catches re because
you keep driving with no coolant, your vehicle
can be badly damaged. The costly repairs
would not be covered by your warranty. See
Overheated Engine Protection Operating Mode
on page 454for information on driving to a
safe place in an emergency.
452

Cooling System
When you decide it is safe to lift the hood, here is
what you will see:
A. Coolant Surge Tank
B. Coolant Surge Tank Pressure Cap
C. Engine Cooling Fan(s){CAUTION:
An electric fan under the hood can start up
and injure you even when the engine is not
running. Keep hands, clothing, and tools
away from any underhood electric fan.
If the coolant inside the coolant surge tank is
boiling, do not do anything else until it cools down.
If possible, the vehicle should be parked on a
level surface. Check the coolant level after
the system cools down. Some amount of coolant
may be lost due to overheating.
5.3L Engine (4.8L and 6.0L Similar)
455

{CAUTION:
Poorly maintained and improperly used
tires are dangerous.
Overloading your tires can cause
overheating as a result of too much
friction. You could have an air-out and
a serious accident. SeeLoading Your
Vehicle on page 390.
Underinated tires pose the same
danger as overloaded tires. The
resulting accident could cause serious
injury.Check all tires frequently to
maintain the recommended pressure.
Tire pressure should be checked when
your tires are cold. SeeInflation - Tire
Pressure on page 490.
CAUTION: (Continued)
CAUTION: (Continued)

Overinated tires are more likely to be
cut, punctured, or broken by a sudden
impact — such as when you hit a
pothole. Keep tires at the
recommended pressure.
Worn, old tires can cause accidents.
If your tread is badly worn, or if
your tires have been damaged,
replace them.
20-Inch Tires
If your vehicle has the optional 20-inch P275/55R20
size tires, they are classied as touring tires and are
designed for on road use. The low-prole, wide
tread design is not recommended for off-road
driving. SeeOff-Road Driving on page 356, for
additional information.
483

Dual Automatic.......................................... 213
Outlet Adjustment...................................... 220
Rear Air Conditioning and Heating
System.................................................. 220
Rear Air Conditioning and Heating
System, Electronic................................. 222
Collision Damage Repair.............................. 584
Comfort Guides, Rear Safety Belt.................. 56
Content Theft-Deterrent................................ 132
Control of a Vehicle..................................... 344
Coolant
Engine Temperature Gage........................ 234
Heater, Engine.......................................... 140
Surge Tank Pressure Cap......................... 451
Cooling System............................................ 455
Cruise Control.............................................. 196
Cruise Control Light..................................... 242
Cupholder(s)................................................ 174
Customer Assistance Information
Courtesy Transportation............................ 581
Customer Assistance for Text Telephone
(TTY) Users.......................................... 575
Customer Assistance Offices..................... 575
Customer Satisfaction Procedure............... 572
GM Mobility Reimbursement Program....... 577
Reporting Safety Defects to
General Motors...................................... 589Customer Assistance Information (cont.)
Reporting Safety Defects to the
Canadian Government........................... 589
Reporting Safety Defects to the
United States Government..................... 588
Roadside Assistance Program................... 577
Service Publications Ordering
Information............................................ 590
D
Daytime Running Lamps.............................. 201
Defensive Driving......................................... 340
Delayed Locking........................................... 121
Displacement on Demand™ (DoD™)............ 141
Doing Your Own Service Work..................... 427
Dome Lamp Override................................... 204
Dome Lamps............................................... 203
Door
Delayed Locking....................................... 121
Locks........................................................ 120
Power Door Locks.................................... 121
Programmable Automatic Door Locks........ 121
Rear Door Security Locks......................... 122
Driver
Position, Safety Belt................................... 44
596

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

Power (cont.)
Steering Fluid........................................... 461
Windows................................................... 131
Pretensioners, Safety Belt.............................. 60
Programmable Automatic Door Locks........... 121
Q
Questions and Answers About Safety Belts....... 42
R
Radios......................................................... 274
Care of Your CD and DVD Player............. 337
Care of Your CDs and DVDs.................... 336
Navigation/Radio System,
see Navigation Manual.......................... 321
Radio with CD.......................................... 278
Radio with CD and DVD........................... 295
Rear Seat Audio....................................... 332
Setting the Time................................276, 277
Theft-Deterrent.......................................... 334
Understanding Reception.......................... 335
Rainsense™ II Wipers.................................. 193
Reading Lamps............................................ 204Rear Air Conditioning and Heating System...... 220
Rear Air Conditioning and Heating System
and Electronic Climate Controls................ 222
Rear Axle..................................................... 472
Locking..................................................... 347
Rear Door Security Locks............................ 122
Rear Heated Seats........................................ 19
Rear Safety Belt Comfort Guides................... 56
Rear Seat Armrest....................................... 176
Rear Seat Audio (RSA)................................ 332
Rear Seat Entertainment System.................. 321
Rear Seat Passengers, Safety Belts............... 54
Rear Side Window Antenna.......................... 337
Rear Storage Area....................................... 176
Rear Windshield Washer/Wiper.................... 195
Rearview Mirror, Automatic Dimming with
Compass and Temperature Display........... 160
Rearview Mirror, Automatic Dimming with
OnStar
®, Compass and Temperature
Display..................................................... 157
Reclining Seatbacks....................................... 15
Recommended Fluids and Lubricants........... 564
Recovery Hooks........................................... 389
Recreational Vehicle Towing......................... 401
Remote Keyless Entry System..................... 112
603