engine overheat GMC SIERRA 2011 Owner's Guide

Black plate (27,1)GMC Sierra Owner Manual - 2011
Vehicle Care 10-27
If No Steam is Coming from
the Engine Compartment
The ENGINE OVERHEATED
STOP ENGINE or the ENGINE
OVERHEATED IDLE ENGINE
message, along with a low coolant
condition, can indicate a serious
problem.
If there is an engine overheat
warning, but no steam is seen or
heard, the problem may not be too
serious. Sometimes the engine can
get a little too hot when the vehicle:
.Climbs a long hill on a hot day
.Stops after high-speed driving
.Idles for long periods in traffic
.Tows a trailer; seeTrailer Towing
on page 9‑95. If the ENGINE OVERHEATED
STOP ENGINE or the ENGINE
OVERHEATED IDLE ENGINE
message appears with no sign of
steam, try this for a minute or so:
1. Turn the air conditioning off.
2. Turn the heater on to the highest
temperature and to the highest
fan speed. Open the windows
as necessary.
3. If stopped in a traffic jam, apply the brake, shift to N (Neutral);
otherwise, shift to the highest
gear while driving —D (Drive)
or 3 (Third).
If the temperature overheat gauge
is no longer in the overheat zone
or an overheat warning no longer
displays, the vehicle can be driven. Continue to drive the vehicle slowly
for about 10 minutes. Keep a safe
vehicle distance from the vehicle in
front. If the warning does not come
back on, continue to drive normally.
If the warning continues, pull
over, stop, and park the vehicle
right away.
If there is no sign of steam, idle
the engine for five minutes while
parked. If the warning is still
displayed, turn off the engine until it
cools down. Also, see
“Overheated
Engine Protection Operating Mode”
later in this section.

Black plate (28,1)GMC Sierra Owner Manual - 2011
10-28 Vehicle Care
Overheated Engine
Protection
Operating Mode
If an overheated engine condition
exists and the ENGINE POWER IS
REDUCED message displays, an
overheat protection mode which
alternates firing groups of cylinders
helps to prevent engine damage.
In this mode, a loss in power and
engine performance will be noticed.
This operating mode allows the
vehicle to be driven to a safe
place in an emergency. Driving
extended km (mi) and/or towing a
trailer in the overheat protection
mode should be avoided.
Notice:After driving in the
overheated engine protection
operating mode, to avoid engine
damage, allow the engine to cool
before attempting any repair.
The engine oil will be severely
degraded. Repair the cause
of coolant loss, change the oil
and reset the oil life system.
See Engine Oil on page 10‑7.
Engine Fan
If the vehicle has a clutched engine
cooling fan, when the clutch is
engaged, the fan spins faster to
provide more air to cool the engine.
In most everyday driving conditions,
the fan is spinning slower and
the clutch is not fully engaged.
This improves fuel economy and
reduces fan noise. Under heavy
vehicle loading, trailer towing,
and/or high outside temperatures,
the fan speed increases as the
clutch more fully engages, so an
increase in fan noise may be heard.
This is normal and should not be
mistaken as the transmission
slipping or making extra shifts.
It is merely the cooling system
functioning properly. The fan will
slow down when additional cooling
is not required and the clutch
disengages. This fan noise may also be heard
when starting the engine. It will go
away as the fan clutch partially
disengages.
If the vehicle has electric cooling
fans, the fans may be heard
spinning at low speed during
most everyday driving. The fans
may turn off if no cooling is required.
Under heavy vehicle loading, trailer
towing, high outside temperatures,
or operation of the air conditioning
system, the fans may change to
high speed and an increase in fan
noise may be heard. This is normal
and indicates that the cooling
system is functioning properly.
The fans will change to low speed
when additional cooling is no
longer required.

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

Black plate (9,1)GMC Sierra Owner Manual - 2011
INDEX i-9
Messages (cont.)Fuel System . . . . . . . . . . . . . . . . . . 5-46
Key and Lock . . . . . . . . . . . . . . . . . 5-46
Lamp . . . . . . . . . . . . . . . . . . . . . . . . . 5-46
Object Detection System . . . . . 5-46
Ride Control System . . . . . . . . . . 5-47
Starting the Vehicle . . . . . . . . . . . 5-48
Tire . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-49
Transmission . . . . . . . . . . . . . . . . . 5-50
Vehicle . . . . . . . . . . . . . . . . . . . . . . . 5-41
Vehicle Reminder . . . . . . . . . . . . . 5-50
Washer Fluid . . . . . . . . . . . . . . . . . 5-51
Mirrors Automatic Dimming
Rearview . . . . . . . . . . . . . . . . . . . . 2-18
Convex . . . . . . . . . . . . . . . . . . . . . . . 2-15
Folding . . . . . . . . . . . . . . . . . . . . . . . 2-16
Heated . . . . . . . . . . . . . . . . . . . . . . . 2-17
Manual . . . . . . . . . . . . . . . . . . . . . . . 2-15
Manual Rearview . . . . . . . . . . . . . 2-18
Park Tilt . . . . . . . . . . . . . . . . . . . . . . 2-17
Power . . . . . . . . . . . . . . . . . . . . . . . . 2-16
Trailer Tow . . . . . . . . . . . . . . . . . . . . 2-15
Monitor System, Tire Pressure . . . . . . . . . . . . . . . . . . . . 10-68N
NavigationVehicle Data Recordingand Privacy . . . . . . . . . . . . . . . 13-18
New Vehicle Break-In . . . . . . . . . . 9-34
Noise Control System . . . . . . . . 10-38
O
Object Detection System Messages . . . . . . . . . . . . . . . . . . . . 5-46
Odometer . . . . . . . . . . . . . . . . . . . . . . 5-14 Trip . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-14
Off-Road . . . . . . . . . . . . . . . . . . . . . . . 9-7
Driving . . . . . . . . . . . . . . . . . . . . . . . . . 9-7
Recovery . . . . . . . . . . . . . . . . . . . . . . 9-5
Oil Engine . . . . . . . . . . . . . . . . . . . . . . . . 10-7
Engine Oil Life System . . . . . .10-11
Engine Oil PressureGauge . . . . . . . . . . . . . . . . . . . . . . 5-16
Messages . . . . . . . . . . . . . . . . . . . . 5-45
Pressure Light . . . . . . . . . . . . . . . . 5-31 Older Children, Restraints . . . . . 3-49
Online Owner Center . . . . . . . . . . 13-6
OnStar
®System . . . . . . . . . . . . . . . 1-36
Operation, Infotainment System . . . . . . . . . . . . . . . . . . . . . . . . 7-2
Outlets Power . . . . . . . . . . . . . . . . . . . . . . . . 5-10
Overheated Engine Protection
Operating Mode . . . . . . . . . . . . . 10-28
Overheating, Engine . . . . . . . . . . 10-25
P
Park
Shifting Into . . . . . . . . . . . . . . . . . . . 9-41
Shifting Out of . . . . . . . . . . . . . . . . 9-43
Park Tilt Mirrors . . . . . . . . . . . . . . . . 2-17
Parking Assist, Ultrasonic . . . . . . . . . . . . . 9-76
Brake . . . . . . . . . . . . . . . . . . . . . . . . . 9-69
Brake and P (Park)Mechanism Check . . . . . . . . 10-40
Over Things That Burn . . . . . . . 9-43