engine overheat GMC YUKON XL 2006 Owner's Manual

How to Add Coolant to the Coolant
Surge Tank
If you have not found a problem yet, check to see if
coolant is visible in the surge tank. If coolant is visible
but the coolant level is not at or above the FULL COLD
mark, add a 50/50 mixture of clean, drinkable water
and DEX-COOL
®coolant at the coolant surge tank,
but be sure the cooling system, including the coolant
surge tank pressure cap, is cool before you do it.
SeeEngine Coolant on page 5-25for more information.
If no coolant is visible in the surge tank, add coolant
as follows:
{CAUTION:
Steam and scalding liquids from a hot cooling
system can blow out and burn you badly. They
are under pressure, and if you turn the coolant
surge tank pressure cap — even a little — they
can come out at high speed. Never turn the
cap when the cooling system, including the
coolant surge tank pressure cap, is hot. Wait
for the cooling system and coolant surge tank
pressure cap to cool if you ever have to turn
the pressure cap.
{CAUTION:
Adding only plain water to your cooling
system can be dangerous. Plain water, or
some other liquid such as alcohol, can boil
before the proper coolant mixture will. Your
vehicle’s coolant warning system is set for the
proper coolant mixture. With plain water or the
wrong mixture, your engine could get too hot
but you would not get the overheat warning.
Your engine could catch re and you or others
could be burned. Use a 50/50 mixture of clean,
drinkable water and DEX-COOL
®coolant.
Notice:In cold weather, water can freeze and crack
the engine, radiator, heater core and other parts.
Use the recommended coolant and the proper
coolant mixture.
5-33

Driving (cont.)
Rocking Your Vehicle to Get it Out.................4-44
Winter........................................................4-40
Dual Automatic Climate Control System.............3-25
Dual Climate Control System............................3-23
DVD
Rear Seat Entertainment System..................3-118
E
Electrical System
Add-On Equipment.....................................5-106
Center Instrument Panel Fuse Block.............5-108
Fuses and Circuit Breakers.........................5-106
Instrument Panel Fuse Block.......................5-107
Power Windows and Other Power Options....5-106
Underhood Fuse Block...............................5-109
Windshield Wiper Fuses.............................5-106
Engine
Air Cleaner/Filter.........................................5-20
Battery.......................................................5-41
Check and Service Engine Soon Light............3-46
Coolant......................................................5-25
Coolant Heater............................................2-22
Coolant Temperature Gage...........................3-43
Drive Belt Routing.......................................6-16
Engine Compartment Overview......................5-12
Exhaust.....................................................2-35
Fan Noise..................................................5-35Engine (cont.)
Oil .............................................................5-15
Oil Life System...........................................5-18
Overheated Protection Operating Mode...........5-30
Overheating................................................5-28
Starting......................................................2-20
Entry Lighting.................................................3-20
Event Data Recorders (EDR)............................7-10
Exit Lighting...................................................3-20
Extender, Safety Belt.......................................1-46
F
Filter
Engine Air Cleaner......................................5-20
Finish Damage.............................................5-103
Fixed Mast Antenna.......................................3-136
Flash-to-Pass................................................... 3-9
Flat Tire........................................................5-75
Flat Tire, Changing.........................................5-76
Flat Tire, Storing.............................................5-92
Fluid
Automatic Transmission................................5-22
Power Steering...........................................5-36
Windshield Washer......................................5-37
Fog Lamps....................................................3-18
Four-Wheel Drive....................................2-26, 5-48
Four-Wheel-Drive Light....................................3-50
Front Axle......................................................5-49
5

N
Navigation/Radio System, see Navigation
Manual.....................................................3-118
New Vehicle Break-In......................................2-19
Normal Maintenance Replacement Parts............6-15
O
Odometer......................................................3-37
Odometer, Trip...............................................3-37
Off-Road Driving.............................................4-16
Off-Road Recovery..........................................4-13
Oil
Engine.......................................................5-15
Pressure Gage............................................3-48
Oil, Engine Oil Life System..............................5-18
Older Children, Restraints................................1-47
Online Owner Center........................................ 7-3
OnStar
®System, see OnStar®Manual...............2-50
Other Warning Devices...................................... 3-6
Outlet Adjustment............................................3-31
Outside
Automatic Dimming Mirror.............................2-48
Camper-Type Mirrors....................................2-46
Convex Mirror.............................................2-49
Curb View Assist Mirrors..............................2-49
Heated Mirrors............................................2-49
Manual Mirrors............................................2-46Outside (cont.)
Power Foldaway Mirrors...............................2-48
Power Mirrors.............................................2-47
Overheated Engine Protection Operating Mode.....5-30
Owner Checks and Services.............................. 6-9
Owners, Canadian............................................... ii
PPark (P)
Shifting Into................................................2-32
Shifting Out of............................................2-34
Parking
Brake........................................................2-31
Over Things That Burn.................................2-34
Passenger Airbag Status Indicator.....................3-38
Passenger Sensing System..............................1-82
Passing.........................................................4-14
Passlock
®......................................................2-18
Power
Accessory Outlet(s)......................................3-20
Door Locks.................................................. 2-9
Electrical System.......................................5-106
Lumbar Controls........................................... 1-4
Retained Accessory (RAP)............................2-20
Seat............................................................ 1-4
Steering Fluid.............................................5-36
Windows....................................................2-15
Programmable Automatic Door Locks.................2-10
9