2010 GMC YUKON DENALI overheating

WARNING: (Continued)
Do not run the engine if there is a leak. If you run
the engine, it could lose all coolant. That could
cause an engine fire, and you could be burned.
Get any leak fixed before you drive the vehicle.
Notice: Using coolant other than DEX-COOL
®can
cause premature engine, heater core, or radiator
corrosion. In addition, the engine coolant could
require changing sooner, at 50 000 km (30,000 miles)
or 24 months, whichever occurs first. Any repairs
would not be covered by the vehicle warranty.
Always use DEX-COOL
®(silicate-free) coolant in the
vehicle.
Engine Coolant
The cooling system in the vehicle is filled with
DEX-COOL®engine coolant. This coolant is designed
to remain in the vehicle for five years or 150,000 miles
(240 000 km), whichever occurs first.
The following explains the cooling system and how to
check and add coolant when it is low. If there is a
problem with engine overheating, see Engine
Overheating on page 6‑32.
6-27

4. With the coolant surge tank pressure cap off, startthe engine and let it run until you can feel the
upper radiator hose getting hot. Watch out for the
engine cooling fan.
By this time, the coolant level inside the coolant
surge tank may be lower. If the level is lower, add
more of the proper mixture to the coolant surge
tank until the level reaches the FULL COLD mark. 5. Replace the pressure cap. Be sure the pressure
cap is hand-tight and fully seated.
6. Verify coolant level after engine is shut off and the coolant is cold. If necessary, repeat coolant fill
procedure Steps 1 through 6.
Notice: If the pressure cap is not tightly installed,
coolant loss and possible engine damage may
occur. Be sure the cap is properly and tightly
secured.
Engine Overheating
The vehicle has several indicators to warn of engine
overheating.
There is a coolant temperature gage on your vehicle's
instrument panel. See Engine Coolant Temperature
Gage on page 4‑34.
In addition, ENGINE OVERHEATED STOP ENGINE,
ENGINE OVERHEATED IDLE ENGINE, and a ENGINE
POWER IS REDUCED message comes on in the Driver
Information Center (DIC) on the instrument panel.
See DIC Warnings and Messages on page 4‑56.
You may decide not to lift the hood when this warning
appears, but instead get service help right away.
See Roadside Assistance Program on page 8‑7.
6-32

If you do decide to lift the hood , make sure the vehicle
is parked on a level surface.
Then check to see if the engine cooling fans are
running. If the engine is overheating, both fans should
be running. If they are not, do not continue to run the
engine and have the vehicle serviced.
Notice:Engine damage from running your engine
without coolant is not covered by your warranty.
See Overheated Engine Protection Operating Mode
on page 6‑35for information on driving to a safe
place in an emergency.
Notice: If the engine catches fire while driving with
no coolant, the vehicle can be badly damaged.
The costly repairs would not be covered by the
vehicle warranty. See Overheated Engine Protection
Operating Mode
on page 6‑35for information on
driving to a safe place in an emergency.
If Steam Is Coming From The Engine
Compartment
{WARNING:
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. Turn it off and get everyone away from the
vehicle until it cools down. Wait until there is no
sign of steam or coolant before you open
the hood.
If you keep driving when the vehicles engine is
overheated, the liquids in it can catch fire. You or
others could be badly burned. Stop the engine if it
overheats, and get out of the vehicle until the
engine is cool.
See Overheated Engine Protection Operating
Mode
on page 6‑35for information on driving to
a safe place in an emergency.
6-33

Tires
Your new vehicle comes with high-quality tires
made by a leading tire manufacturer. If you ever
have questions about your tire warranty and
where to obtain service, see your vehicle
Warranty booklet for details. For additional
information refer to the tire manufacturer.
{WARNING:
.Poorly maintained and improperly used
tires are dangerous.
.Overloading your tires can cause
overheating as a result of too much
flexing. You could have an air-out and a
serious accident. SeeLoading the Vehicle
on page 5‑31.
(Continued)
WARNING: (Continued)
.Underinflated 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 6‑64
.
.Overinflated 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.
See High-Speed Operation
on page 6‑66for
inflation pressure adjustment for high speed
driving.
6-57

Engine (cont.)Cooling System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-26
Drive Belt Routing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-14
Exhaust . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-40
Fan Noise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-35
Oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-15
Overheated Protection Operating Mode . . . . . . . . . . 6-35
Overheating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-32
Starting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-26
Engine Oil Life System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-18
Entry Lighting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-15
Event Data Recorders . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-18
Exit Lighting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-15
Extender, Safety Belt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-48
Exterior Lamps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-11
F
Features Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
Filter Engine Air Cleaner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-20
Finish Damage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-105
Flash-to-Pass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-6 Flashers, Hazard Warning . . . . . . . . . . . . . . . . . . . . . . . . . . .4-3
Flat Tire . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-79
Flat Tire, Changing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-80
Flat Tire, Storing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-94
Fluid
Automatic Transmission . . . . . . . . . . . . . . . . . . . . . . . . . . 6-22
Power Steering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-36
Windshield Washer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-37
Fog Lamps Bulb Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-14
Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-40
Front Axle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-49
Front Reading Lamps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-15
Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-5 Additives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-6
California Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-6
E85 (85% Ethanol) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-7
Filling a Portable Fuel Container . . . . . . . . . . . . . . . . . . 6-11
Filling the Tank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-9
Fuels in Foreign Countries . . . . . . . . . . . . . . . . . . . . . . . . . 6-8
Gage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-41
Gasoline Octane . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-6
Gasoline Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-6
Low Fuel Warning Light . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-42
Management, Active . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-29
i - 6