oil additives GMC SIERRA 2011 Owner's Manual

Black plate (86,1)GMC Sierra Owner Manual - 2011
9-86 Driving and Operating
Fuels in Foreign
Countries
Never use leaded gasoline or any
other fuel not recommended in the
previous text on fuel. Costly repairs
caused by use of improper fuel
would not be covered by the vehicle
warranty.
To check the fuel availability, ask
an auto club, or contact a major oil
company that does business in the
country where you will be driving.
Fuel Additives
To provide cleaner air, all gasolines
in the United States are now
required to contain additives that
help prevent engine and fuel system
deposits from forming, allowing the
emission control system to work
properly. In most cases, nothing
should have to be added to the fuel.
However, some gasolines contain
only the minimum amount ofadditive required to meet U.S.
Environmental Protection Agency
regulations. To help keep fuel
injectors and intake valves clean
and avoid problems due to dirty
injectors or valves, look for gasoline
that is advertised as TOP TIER
Detergent Gasoline. Look for the
TOP TIER label on the fuel pump to
ensure gasoline meets enhanced
detergency standards developed
by the auto companies. A list of
marketers providing TOP TIER
Detergent Gasoline can be found
at www.toptiergas.com.
For customers who do not use
TOP TIER Detergent Gasoline
regularly, one bottle of GM Fuel
System Treatment PLUS, added
to the fuel tank at every engine oil
change, can help clean deposits
from fuel injectors and intake
valves. GM Fuel System Treatment
PLUS is the only gasoline additive
recommended by General Motors.
It is available at your dealer.Gasolines containing oxygenates,
such as ethers and ethanol,
and reformulated gasolines
might be available in your area.
We recommend that you use these
gasolines, if they comply with the
specifications described earlier.
However, E85 (85% ethanol) and
other fuels containing more than
10% ethanol must not be used in
vehicles that were not designed
for those fuels.
Notice:
This vehicle was not
designed for fuel that contains
methanol. Do not use fuel
containing methanol. It can
corrode metal parts in the fuel
system and also damage plastic
and rubber parts. That damage
would not be covered under the
vehicle warranty.

Black plate (11,1)GMC Sierra Owner Manual - 2011
Vehicle Care 10-11
Engine Oil Additives/Engine
Oil Flushes
Do not add anything to the oil.
The recommended oils with the
dexos specification and displaying
the dexos certification mark are all
that is needed for good performance
and engine protection.
Engine oil system flushes are not
recommended and could cause
engine damage not covered by
the vehicle warranty.
What to Do with Used Oil
Used engine oil contains certain
elements that can be unhealthy for
your skin and could even cause
cancer. Do not let used oil stay on
your skin for very long. Clean your
skin and nails with soap and water,
or a good hand cleaner. Wash or
properly dispose of clothing or rags
containing used engine oil. See the
manufacturer's warnings about the
use and disposal of oil products.
Used oil can be a threat to the
environment. If you change your
own oil, be sure to drain all the
oil from the filter before disposal.
Never dispose of oil by putting it
in the trash or pouring it on the
ground, into sewers, or into streams
or bodies of water. Recycle it by
taking it to a place that collects
used oil.
Engine Oil Life System
When to Change Engine Oil
This vehicle has a computer system
that indicates when to change the
engine oil and filter. This is based
on engine revolutions and engine
temperature, and not on mileage.
Based on driving conditions, the
mileage at which an oil change is
indicated can vary considerably.
For the oil life system to work
properly, the system must be reset
every time the oil is changed.
On some vehicles, when the system
has calculated that oil life has been
diminished, a CHANGE ENGINE
OIL SOON message comes on
to indicate that an oil change is
necessary. SeeEngine Oil
Messages on page 5‑45. Change
the oil as soon as possible within
the next 1 000 km (600 miles).

Black plate (23,1)GMC Sierra Owner Manual - 2011
Vehicle Care 10-23
Notice:If extra inhibitors
and/or additives are used in
the vehicle cooling system,
the vehicle could be damaged.
Use only the proper mixture of
the engine coolant listed in this
manual for the cooling system.
See Recommended Fluids and
Lubricants on page 11‑8 for more
information.
Never dispose of engine coolant
by putting it in the trash, pouring
it on the ground, or into sewers,
streams, or bodies of water.
Have the coolant changed by an
authorized service center, familiar
with legal requirements regarding
used coolant disposal. This will help
protect the environment and your
health.Checking Coolant
The coolant surge tank is located
in the engine compartment on the
passenger side of the vehicle.
See Engine Compartment Overview
on page 10‑6 for more information
on location.
The vehicle must be on a level
surface when checking the coolant
level.
Check to see if coolant is visible
in the coolant surge tank. If the
coolant inside the coolant surge
tank is boiling, do not do anything
else until it cools down. 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 is cool before this
is done.
The coolant level should be at or
above the FULL COLD mark. If it is
not, there may be a leak in the
cooling system.

Black plate (5,1)GMC Sierra Owner Manual - 2011
INDEX i-5
Engine (cont.)Cooling System Messages . . . 5-44
Drive Belt Routing . . . . . . . . . . . . 12-6
Exhaust . . . . . . . . . . . . . . . . . . . . . . 9-44
Fan . . . . . . . . . . . . . . . . . . . . . . . . . 10-28
Oil Pressure Gauge . . . . . . . . . . 5-16
Overheated Protection
Operating Mode . . . . . . . . . . . 10-28
Overheating . . . . . . . . . . . . . . . . 10-25
Power Messages . . . . . . . . . . . . . 5-45
Pressure Light . . . . . . . . . . . . . . . . 5-31
Running While Parked . . . . . . . . 9-45
Starting . . . . . . . . . . . . . . . . . . . . . . . 9-37
Engine Oil
Life System . . . . . . . . . . . . . . . . . .10-11
Messages . . . . . . . . . . . . . . . . . . . . 5-45
Entry Lighting . . . . . . . . . . . . . . . . . . . 6-9
Equipment, Towing . . . . . . . . . . . 9-112
Event Data Recorders . . . . . . . . 13-17
Exit Lighting . . . . . . . . . . . . . . . . . . . . 6-9
Extender, Safety Belt . . . . . . . . . . 3-27
Exterior Lamp Controls . . . . . . . . . 6-1
Exterior Lamps Off Reminder . . . 6-3F
Fan Engine . . . . . . . . . . . . . . . . . . . . . . 10-28
Fast Idle System . . . . . . . . . . . . . . . 9-39
Features Memory . . . . . . . . . . . . . . . . . . . . . . . 1-13
Filter
Engine Air Cleaner . . . . . . . . . 10-19
Flash-to-Pass . . . . . . . . . . . . . . . . . . . 6-3
Flashers, Hazard Warning . . . . . . 6-5
Flat Tire . . . . . . . . . . . . . . . . . . . . . . 10-84 Changing . . . . . . . . . . . . . . . . . . . 10-86
Floor Mats . . . . . . . . . . . . . . . . . . . 10-116
Fluid AutomaticTransmission . . . . . . . 10-13, 10-16
Brakes . . . . . . . . . . . . . . . . . . . . . . 10-32
Four-Wheel Drive Transfer Case . . . . . . . . . . . . . . . 9-54
Power Steering . . . . . . . . . . . . . 10-29
Washer . . . . . . . . . . . . . . . . . . . . . 10-29 Fog Lamps
Bulb Replacement . . . . . . . . . . . . . 6-6
Folding Mirrors . . . . . . . . . . . . . . . . 2-16
Four-Wheel Drive . . . . . . . 10-34, 9-54
Four-Wheel-Drive Light . . . . . . . . 5-29
Front Axle . . . . . . . . . . . . . . . . . . . . 10-36
Front Fog Lamps Light . . . . . . . . . . . . . . . . . . . . . . . . . . 5-32
Front Seats Adjustment . . . . . . . . . . . . . . . . . . . . 3-3
Heated . . . . . . . . . . . . . . . . . . . . . . . . 3-8
Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-84 Additives . . . . . . . . . . . . . . . . . . . . . 9-86
E85 (85% Ethanol) . . . . . . . . . . . 9-87
Filling a Portable FuelContainer . . . . . . . . . . . . . . . . . . . 9-90
Filling the Tank . . . . . . . . . . . . . . . 9-88
Fuels in Foreign Countries . . . . 9-86
Gasoline Specifications . . . . . . . 9-85
Gauge . . . . . . . . . . . . . . . . . . . . . . . . 5-15
Low Fuel Warning Light . . . . . . . 5-31