overheating GMC SIERRA DENALI 2017 User Guide

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-9955992) - 2017 - crc - 4/18/17
376 Vehicle Care
Light-Duty
Coolant Surge
Tank
Pressure Cap Heavy-Duty
Coolant Surge
Tank
Pressure Cap
1. Remove the coolant surge tank
pressure cap when the cooling
system, including the coolant
surge tank pressure cap and
upper radiator hose, is no
longer hot.
Turn the pressure cap slowly
counterclockwise about one full
turn. If a hiss is heard, wait for
that to stop. A hiss means
there is still some pressure left.
2. Keep turning the pressure cap
slowly, and remove it.
3. Fill the coolant surge tank with
the proper mixture to the FULL
COLD mark. 4. With the coolant surge tank
pressure cap off, start the
engine and let it run until the
engine coolant temperature
gauge indicates approximately
90 °C (195 °F).
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
tightly.
6. Verify coolant level after the
engine is shut off and the
coolant is cold. If necessary,
repeat coolant fill procedure
Steps 1 – 6.
Caution
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 If the vehicle has the Duramax
diesel engine, see the Duramax
diesel supplement.
CautionRunning the engine without
coolant may cause damage or a
fire. Vehicle damage would not be
covered by the vehicle warranty.
The vehicle has several indicators
to warn of engine overheating.
There is a coolant temperature
gauge in the vehicle's instrument
cluster. See Engine Coolant
Temperature Gauge 0 138 .
In addition, there are ENGINE
OVERHEATED STOP ENGINE,
ENGINE OVERHEATED IDLE
ENGINE, and ENGINE POWER IS
REDUCED messages in the Driver
Information Center (DIC).
See Engine Cooling System
Messages 0 159 and Engine Power
Messages 0 160 .

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-9955992) - 2017 - crc - 4/18/17
Vehicle Care 377If the decision is made not to lift the
hood when this warning appears,
get service help right away. See
Roadside Assistance Program
0 478 .
If the decision is made to lift the
hood, make sure the vehicle is
parked on a level surface.
4.3L V6, 5.3L V8, and 6.2L
V8 Engines
Check to see if the engine cooling
fans are running. If the engine is
overheating, the fans should be
running. If they are not, do not
continue to run the engine and have
the vehicle serviced.
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. Just turn it
(Continued) Warning (Continued) 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
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.
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; see Trailer Towing
0 323 .
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. When it is safe to do so, pull off
the road, shift to P (Park) or
N (Neutral) and let the
engine idle.

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-9955992) - 2017 - crc - 4/18/17
400 Vehicle Care Number Usage
20 –
22 HVAC/Auxiliary
HVAC/Ignition
23 Instrument cluster/
Ignition sensing
diagnostic module/
Ignition
24 –
25 Data link connector/
Driver seat module
26 Passive entry/Passive
start/HVAC
27 –
28 –
29 Park enable/
Electrically adjustable
pedals
30 SEO
31 Accessory/Run/Crank
32 Heated steering wheel
33 –
34 Instrument cluster
36 – Number Usage
37 –
38 4WD TREC
40 Left doors
41 Driver power seat
43 Left heated, cooled or
ventilated seats (if
equipped)
44 Right heated, cooled
or ventilated seats (if
equipped)
45 –
49 Retained accessory
power
50 Run/Crank Wheels and Tires Tires Every new GM vehicle has
high-quality tires made by a
leading tire manufacturer. See
the warranty manual for
information regarding the tire
warranty and where to get
service. For additional
information refer to the tire
manufacturer.
{ Warning.
Poorly maintained and
improperly used tires are
dangerous. .
Overloading the tires can
cause overheating as a
result of too much
flexing. There could be a
blowout and a serious
crash. See Vehicle Load
Limits 0 265 .
(Continued)

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-9955992) - 2017 - crc - 4/18/17
Vehicle Care 409Caution
Neither tire underinflation nor
overinflation is good.
Underinflated tires, or tires
that do not have enough air,
can result in: .
Tire overloading and
overheating which could
lead to a blowout..
Premature or
irregular wear..
Poor handling..
Reduced fuel economy.
Overinflated tires, or tires that
have too much air, can
result in: .
Unusual wear.
.
Poor handling.
.
Rough ride.
.
Needless damage from
road hazards. The Tire and Loading
Information label on the vehicle
indicates the original equipment
tires and the correct cold tire
inflation pressures. The
recommended pressure is the
minimum air pressure needed to
support the vehicle's maximum
load carrying capacity.
For additional information
regarding how much weight the
vehicle can carry, and an
example of the Tire and Loading
Information label, see Vehicle
Load Limits 0 265 . How the
vehicle is loaded affects vehicle
handling and ride comfort. Never
load the vehicle with more
weight than it was designed to
carry.
When to Check
Check the tires once a month
or more. Do not forget the spare tire,
if the vehicle has one. See
Full-Size Spare Tire 0 434 for
additional information.
How to Check
Use a good quality pocket-type
gauge to check tire pressure.
Proper tire inflation cannot be
determined by looking at the tire.
Check the tire inflation pressure
when the tires are cold, meaning
the vehicle has not been driven
for at least three hours or no
more than 1.6 km (1 mi).
Remove the valve cap from the
tire valve stem. Press the tire
gauge firmly onto the valve to
get a pressure measurement.
If the cold tire inflation pressure
matches the recommended
pressure on the Tire and
Loading Information label, no
further adjustment is necessary.
If the inflation pressure is low,
add air until the recommended
pressure is reached. If the

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-9955992) - 2017 - crc - 4/18/17
Index 501Customer Satisfaction
Procedure . . . . . . . . . . . . . . . . . . . . . 474
D Damage Repair, Collision . . . . . . . 481
Danger, Warning, and Caution . . . . 3
Data Collection
Infotainment System . . . . . . . . . . 487
OnStar . . . . . . . . . . . . . . . . . . . . . . . 486
Data Recorders, Event . . . . . . . . . 486
Daytime Running
Lamps (DRL) . . . . . . . . . . . . . . . . . . 181
Defensive Driving . . . . . . . . . . . . . . . 254
Delayed Locking . . . . . . . . . . . . . . . . . 40
Diagnostics
OnStar ®
. . . . . . . . . . . . . . . . . . . . . . 492
Distracted Driving . . . . . . . . . . . . . . . 253
Dome Lamps . . . . . . . . . . . . . . . . . . . 185
Door
Ajar Light . . . . . . . . . . . . . . . . . . . . . 152
Ajar Messages . . . . . . . . . . . . . . . 158
Delayed Locking . . . . . . . . . . . . . . . . 40
Locks . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Power Locks . . . . . . . . . . . . . . . . . . . . 40
Drive Belt Routing, Engine . . . . . . 473
Driver Assistance Systems . . . . . 305
Driver Information
Center (DIC) . . . . . . . . . . . . . 152, 154 Driving
Assistance Systems . . . . . . . . . . 308
Characteristics and
Towing Tips . . . . . . . . . . . . . . . . . 320
Defensive . . . . . . . . . . . . . . . . . . . . . 254
Drunk . . . . . . . . . . . . . . . . . . . . . . . . . 254
For Better Fuel Economy . . . . . . . 31
Hill and Mountain Roads . . . . . . 262
If the Vehicle is Stuck . . . . . . . . . 264
Loss of Control . . . . . . . . . . . . . . . 256
Off-Road . . . . . . . . . . . . . . . . . . . . . 257
Off-Road Recovery . . . . . . . . . . . 256
Vehicle Load Limits . . . . . . . . . . . 265
Wet Roads . . . . . . . . . . . . . . . . . . . 261
Winter . . . . . . . . . . . . . . . . . . . . . . . . 263
Dual Automatic Climate
Control System . . . . . . . . . . . . . . . . 246
E E85 or FlexFuel . . . . . . . . . . . . . . . . 317
Electrical Equipment,
Add-On . . . . . . . . . . . . . . . . . . . . . . . 350
Electrical System
Engine Compartment Fuse
Block . . . . . . . . . . . . . . . . . . . . . . . . 393
Fuses . . . . . . . . . . . . . . . . . . . . . . . . 393
Instrument Panel Fuse
Block . . . . . . . . . . . . . . . . . . . 396, 398
Overload . . . . . . . . . . . . . . . . . . . . . 392 Emergency
OnStar ®
. . . . . . . . . . . . . . . . . . . . . . 489
Engine
Air Cleaner/Filter . . . . . . . . . . . . . 371
Check Light (Malfunction
Indicator) . . . . . . . . . . . . . . . . . . . . 144
Compartment Overview . . . . . . . 359
Coolant . . . . . . . . . . . . . . . . . . . . . . . 374
Coolant Heater . . . . . . . . . . . . . . . 278
Coolant Temperature
Gauge . . . . . . . . . . . . . . . . . . . . . . 138
Coolant Temperature
Warning Light . . . . . . . . . . . . . . . 149
Cooling System . . . . . . . . . . . . . . . 372
Cooling System Messages . . . 159
Drive Belt Routing . . . . . . . . . . . . 473
Exhaust . . . . . . . . . . . . . . . . . . . . . . 282
Fan . . . . . . . . . . . . . . . . . . . . . . . . . . . 378
Oil Life System . . . . . . . . . . . . . . . 367
Oil Messages . . . . . . . . . . . . . . . . . 159
Oil Pressure Gauge . . . . . . . . . . 137
Oil Pressure Light . . . . . . . . . . . . 150
Overheated Protection
Operating Mode . . . . . . . . . . . . . 378
Overheating . . . . . . . . . . . . . . . . . . 376
Power Messages . . . . . . . . . . . . . 160
Running While Parked . . . . . . . . 282
Starting . . . . . . . . . . . . . . . . . . . . . . . 275

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-9955992) - 2017 - crc - 4/18/17
506 Index OnStar ®
Overview . . . . . . . . . . . . . . 488
OnStar ®
Security . . . . . . . . . . . . . . . 489
Operating Mode
Overheated Engine
Protection . . . . . . . . . . . . . . . . . . . 378
Operation
Fog Lamps . . . . . . . . . . . . . . . . . . . 183
Ordering
Service Publications . . . . . . . . . . 483
Outlets
Power . . . . . . . . . . . . . . . . . . . . . . . . 128
Overheated Engine
Protection Operating Mode . . . . 378
Overheating, Engine . . . . . . . . . . . . 376
Overview . . . . . . . . . . . . . . . . . . 189, 193
P Park
Shifting Into . . . . . . . . . . . . . . . . . . . 279
Shifting Out of . . . . . . . . . . . . . . . . 280
Parking
Brake . . . . . . . . . . . . . . . . . . . . . . . . . 297
Brake and P (Park)
Mechanism Check . . . . . . . . . . 388
Over Things That Burn . . . . . . . 281
Parking Assist . . . . . . . . . . . . . . . . . . 306
Parking or Backing
Assistance Systems . . . . . . . . . . 306 Passenger Airbag Status
Indicator . . . . . . . . . . . . . . . . . . . . . . 143
Passenger Compartment Air
Filter . . . . . . . . . . . . . . . . . . . . . . . . . . 250
Passenger Sensing System . . . . . 81
Perchlorate Materials
Requirements, California . . . . . . 357
Personalization
Vehicle . . . . . . . . . . . . . . . . . . . . . . . 167
Phone
Apple CarPlay and
Android Auto . . . . . . . . . . . . . . . . 237
Bluetooth . . . . . . . . 222, 224,
228, 233
Pickup Conversion to
Chassis Cab . . . . . . . . . . . . . . . . . . 354
Port
USB . . . . . . . . . . . . . . . . . . . . . 206, 208
Power
Door Locks . . . . . . . . . . . . . . . . . . . . . 40
Mirrors . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Outlets . . . . . . . . . . . . . . . . . . . . . . . 128
Protection, Battery . . . . . . . . . . . . 187
Retained Accessory (RAP) . . . 277
Seat Adjustment . . . . . . . . . . . . . . . . 58
Steering Fluid . . . . . . . . . . . . . . . . . 379
Windows . . . . . . . . . . . . . . . . . . . . . . . 51
Power Assist Steps . . . . . . . . . . . . . . 42 Pregnancy, Using Safety Belts . . . 70
Privacy
Vehicle Data Recording . . . . . . . 485
Program
Courtesy Transportation . . . . . . 480
Proposition
65 Warning,
California . . . . . . . . . . . .357, 383, 435
R Radio Frequency Statement . . . . 484
Radio Reception . . . . . . . . . . . . . . . . 202
Radios
AM-FM Radio . . . . . . . . . . . . 197, 199
Satellite . . . . . . . . . . . . . . . . . . 200, 201
Reading Lamps . . . . . . . . . . . . . . . . . 185
Rear Axle . . . . . . . . . . . . . . . . . . . . . . . 385
Locking . . . . . . . . . . . . . . . . . . . . . . . 302
Rear Seats . . . . . . . . . . . . . . . . . . 63, 64
Rear Vision Camera (RVC) . . . . . 306
Rear Windows . . . . . . . . . . . . . . . . . . . 53
Rearview Mirrors . . . . . . . . . . . . . . . . 50
Automatic Dimming . . . . . . . . . . . . . 50
Reclining Seatbacks . . . . . . . . . . . . . 59
Recognition
Voice . . . . . . . . . . . . . . . . . . . . . . . . . 216
Recommended Fluids and
Lubricants . . . . . . . . . . . . . . . . . . . . . 464