2019 CHEVROLET SILVERADO engine overheat

Chevrolet Silverado Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
1500-11698642) - 2019 - CRC - 2/20/19
Vehicle Care 329
5.3L V8 Engine (L84) Shown, 5.3LV8 Engine (L82) and 6.2LV8 Engine (L87) Similar
1. Engine Electric Cooling Fans (Out of View)
2. Coolant Surge Tank and Pressure Cap
{Warning
An underhood electric fan can
start up even when the engine is
not running and can cause injury.
Keep hands, clothing, and tools
away from any underhood
electric fan.
{Warning
Do not touch heater, radiator, a/c
pipes or hoses, or other engine
parts. They can be very hot and
can burn you. Do not run the
engine if there is a leak; all
coolant could leak out. That could
cause an engine fire and can
burn you. Fix any leak before
driving 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 5 years or
240 000 km (150,000 mi), 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 0332.
What to Use
{Warning
Plain water, or other liquids such
as alcohol, can boil before the
proper coolant mixture will. With
plain water or the wrong mixture,
the engine could get too hot but
there would not be an overheat
warning. The engine could catch
fire and you or others could be
burned.
Use a 50/50 mixture of clean,
drinkable water and DEX-COOL
coolant. This mixture:
. Gives freezing protection down
to−37 °C (−34 °F), outside
temperature.
. Gives boiling protection up to
129 °C (265 °F), engine
temperature.
. Protects against rust and
corrosion.
. Will not damage aluminum parts.

Chevrolet Silverado Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
1500-11698642) - 2019 - CRC - 2/20/19
Vehicle Care 331
3. Connect the vehicle to abattery charger.
4. Turn the ignition on for Key Access vehicles or to Service
Only for Keyless Access
vehicles. See Ignition Positions
(Key Access) 0218 or
Ignition Positions (Keyless
Access) 0220.
5. Turn off the air conditioning.
6. Set the parking brake.
7. At the same time, press the accelerator and the brake for
automatic transmission
vehicles for two seconds, then
release.
At the end of the cycle, check the
coolant level in the surge tank and
add coolant if it is low. Turn off the
vehicle, allow the Electronic Control
Module (ECM) to go to sleep, about
2 minutes, and repeat Steps 3-7.
Listen for pump activation and
movement of the control valves
while watching the level of the
coolant in the surge tank. If the tank
empties, turn the ignition off, carefully remove the surge tank cap,
refill to the indicated mark, and
repeat Steps 3-6. The fill and air
removal process will run for
approximately 10 minutes.
How to Add Coolant to the
Coolant Surge Tank for
Gasoline Engines Except L3B
If the vehicle has a diesel engine,
see
“Cooling System” in the
Duramax diesel supplement for the
proper coolant fill procedure.
{Warning
Spilling coolant on hot engine
parts can burn you. Coolant
contains ethylene glycol and it will
burn if the engine parts are hot
enough.
{Warning
Plain water, or other liquids such
as alcohol, can boil before the
proper coolant mixture will. With
plain water or the wrong mixture,
the engine could get too hot but
there would not be an overheat
warning. The engine could catch
fire and you or others could be
burned.
{Warning
Steam and scalding liquids from a
hot cooling system are under
pressure. Turning the pressure
cap, even a little, can cause them
to come out at high speed and
you could be burned. Never turn
the cap when the cooling system,
including the pressure cap, is hot.
Wait for the cooling system and
pressure cap to cool.

Chevrolet Silverado Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
1500-11698642) - 2019 - CRC - 2/20/19
332 Vehicle Care
Caution
Failure to follow the specific
coolant fill procedure could cause
the engine to overheat and could
cause system damage. If coolant
is not visible in the surge tank,
contact your dealer.
If no coolant is visible in the surge
tank, add coolant.
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
indicated 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 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.
Caution
Do not run the engine if there is a
leak in the engine cooling system.
This can cause a loss of all
coolant and can damage the
system and vehicle. Have any
leaks fixed right away.

Chevrolet Silverado Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
1500-11698642) - 2019 - CRC - 2/20/19
Vehicle Care 333
The vehicle has several indicators
to warn of engine overheating.
There is a coolant temperature
gauge in the vehicle's instrument
cluster. SeeEngine Coolant
Temperature Gauge 0146.
In addition, there are ENGINE
OVERHEATED STOP ENGINE,
ENGINE OVERHEATED IDLE
ENGINE, and ENGINE POWER IS
REDUCED messages in the Driver
Information Center (DIC).
If the decision is made not to lift the
hood when this warning appears,
get service help right away. See
Roadside Assistance Program
0 439.
If the decision is made to lift the
hood, make sure the vehicle is
parked on a level surface.
2.7L L4, 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. Have the
vehicle serviced.
If Steam is Coming from the
Engine Compartment
{Warning
Steam and scalding liquids from a
hot cooling system are under
pressure. Turning the pressure
cap, even a little, can cause them
to come out at high speed and
you could be burned. Never turn
the cap when the cooling system,
including the pressure cap, is hot.
Wait for the cooling system and
pressure cap to 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.The 2.7L L4 engine will shut down
automatically if the ENGINE
OVERHEATED STOP ENGINE
message displays.
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
0 282.
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.

Chevrolet Silverado Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
1500-11698642) - 2019 - CRC - 2/20/19
334 Vehicle Care
3. When it is safe to do so, pull offthe road, shift to P (Park) or
N (Neutral) and let the
engine idle.
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
and have the cooling system
checked for proper fill and function.
If the warning continues, pull over,
stop, and park the vehicle
right away.
If there is still no sign of steam and
the vehicle is equipped with an
engine driven cooling fan, push
down the accelerator until the
engine speed is about twice as fast
as normal idle speed for at least
five minutes while the vehicle is
parked. If the warning is still there,
turn off the engine and get everyone
out of the vehicle until it cools down. 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.
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
distances and/or towing a trailer in
the overheat protection mode
should be avoided.
Caution
After driving in the overheated
engine protection operating
mode, the engine oil will be
severely degraded. Any repairs
performed before the engine is
cool may cause engine damage.
Allow the engine to cool before
attempting any repair. Repair the
cause of coolant loss, change the
oil, and reset the oil life system.
See
Engine Oil 0322.
Engine Fan
The vehicle has electric cooling
fan(s). 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

Chevrolet Silverado Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
1500-11698642) - 2019 - CRC - 2/20/19
464 Index
Door (cont'd)Locks . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Power Locks . . . . . . . . . . . . . . . . . . . . 46
Drive Belt Routing, Engine . . . . . . 434
Driver Assistance Systems . . . . . 254
Driver Information
Center (DIC) . . . . . . . . . . . . . 160, 161
Driver Mode Control . . . . . . . . . . . . 247
Driver Mode Control Light . . . . . . 157
Driving Assistance Systems . . . . . . . . . . 261
Characteristics andTowing Tips . . . . . . . . . . . . . . . . . 277
Defensive . . . . . . . . . . . . . . . . . . . . . 199
Drunk . . . . . . . . . . . . . . . . . . . . . . . . . 199
For Better Fuel Economy . . . . . . . 30
Hill and Mountain Roads . . . . . . 207
If the Vehicle is Stuck . . . . . . . . . 209
Loss of Control . . . . . . . . . . . . . . . 201
Off-Road . . . . . . . . . . . . . . . . . . . . . 201
Off-Road Recovery . . . . . . . . . . . 200
Vehicle Load Limits . . . . . . . . . . . 210
Wet Roads . . . . . . . . . . . . . . . . . . . 206
Winter . . . . . . . . . . . . . . . . . . . . . . . . 207
Dual Automatic Climate Control System . . . . . . . . . . . . . . . . 191E
E85 or FlexFuel . . . . . . . . . . . . . . . . 273
Electric Parking Brake . . . . . . . . . . 242
Electric Parking Brake Light . . . . 153
Electrical Equipment,Add-On . . . . . . . . . . . . . . . . . . . . . . . 307
Electrical System Engine Compartment FuseBlock . . . . . . . . . . . . . . . . . . . . . . . . 352
Fuses and Circuit Breakers . . . 351
Instrument Panel Fuse
Block . . . . . . . . . . . . . . . . . . . 355, 358
Overload . . . . . . . . . . . . . . . . . . . . . 351
Electronic Stability Control
(ESC) Off Light . . . . . . . . . . . . . . . . 156
Emergency OnStar . . . . . . . . . . . . . . . . . . . . . . . 450
Engine Air Cleaner/Filter . . . . . . . . . . . . . 327
Check Light (Malfunction
Indicator) . . . . . . . . . . . . . . . . . . . . 150
Compartment Overview . . . . . . . 317
Coolant Temperature Gauge . . . . . . . . . . . . . . . . . . . . . . 146
Coolant Temperature Warning Light . . . . . . . . . . . . . . . 156
Cooling System . . . . . . . . . . . . . . . 328
Drive Belt Routing . . . . . . . . . . . . 434 Engine (cont'd)
Exhaust . . . . . . . . . . . . . . . . . . . . . . 229
Fan . . . . . . . . . . . . . . . . . . . . . . . . . . . 334
Heater . . . . . . . . . . . . . . . . . . . . . . . . 224
Oil Life System . . . . . . . . . . . . . . . 324
Oil Pressure Gauge . . . . . . . . . . 145
Oil Pressure Light . . . . . . . . . . . . 158
Overheated Protection
Operating Mode . . . . . . . . . . . . . 334
Overheating . . . . . . . . . . . . . . . . . . 332
Power Messages . . . . . . . . . . . . . 168
Running While Parked . . . . . . . . 229
Starting . . . . . . . . . . . . . . . . . . . . . . . 222
Engine Air Filter Life System . . . . 326
Entry Lighting . . . . . . . . . . . . . . . . . . . 185
Equipment, Towing . . . . . . . . . . . . . 286
Event Data Recorders . . . . . . . . . . 447
Exit Lighting . . . . . . . . . . . . . . . . . . . . 185
Extended Parking . . . . . . . . . . . . . . . 228
Extender, Seat Belt . . . . . . . . . . . . . . 84
Exterior Cargo Lamps . . . . . . . . . . 183
Exterior Lamp Controls . . . . . . . . . 177
Exterior Lamps Off Reminder . . . 179
Exterior Lighting Battery
Saver . . . . . . . . . . . . . . . . . . . . . . . . . 187

Chevrolet Silverado Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
1500-11698642) - 2019 - CRC - 2/20/19
468 Index
MirrorRear Camera . . . . . . . . . . . . . . . . . . . 59
Mirrors Automatic Dimming . . . . . . . . . . . . . 58
Automatic DimmingRearview . . . . . . . . . . . . . . . . . . . . . . 59
Blind Spot . . . . . . . . . . . . . . . . . . . . . . 58
Convex . . . . . . . . . . . . . . . . . . . . . . . . . 56
Folding . . . . . . . . . . . . . . . . . . . . . . . . . 56
Heated . . . . . . . . . . . . . . . . . . . . . . . . . 58
Manual . . . . . . . . . . . . . . . . . . . . . . . . . 56
Manual Rearview . . . . . . . . . . . . . . . 59
Power . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Tilt in Reverse . . . . . . . . . . . . . . . . . . 59
Mirrors, Interior Rearview . . . . . . . . 59
Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . 247 Driver Control . . . . . . . . . . . . . . . . . 247
Monitor System, Tire Pressure . . . . . . . . . . . . . . . . . . . . . . 370
N
NavigationConnected Services . . . . . . . . . . 457
New Vehicle Break-In . . . . . . . . . . . 217
Noise Control System . . . . . . . . . . 343
O
Odometer . . . . . . . . . . . . . . . . . . . . . . . 144 Odometer (cont'd)
Trip . . . . . . . . . . . . . . . . . . . . . . . . . . . 144
Off-Road . . . . . . . . . . . . . . . . . . . . . . . 201 Driving . . . . . . . . . . . . . . . . . . . . . . . . 201
Recovery . . . . . . . . . . . . . . . . . . . . . 200
Oil Engine . . . . . . . . . . . . . . . . . . . . . . . . 322
Engine Oil Life System . . . . . . . 324
Engine Oil Pressure Gauge . . . 145
Pressure Light . . . . . . . . . . . . . . . . 158
Older Children, Restraints . . . . . . . 99
Online Owner Center . . . . . . . . . . . 438
OnStar . . . . . . . . . . . . . . . . . . . . . . . . . 448
OnStar Additional Information . . . . . . . . . . . . . . . . . . . . 451
OnStar Emergency . . . . . . . . . . . . . 450
OnStar Overview . . . . . . . . . . . . . . . 449
OnStar Security . . . . . . . . . . . . . . . . 451
Operating Mode Overheated EngineProtection . . . . . . . . . . . . . . . . . . . 334
Operation Fog Lamps . . . . . . . . . . . . . . . . . . . 182
Outlets Power . . . . . . . . . . . . . . . . . . . . . . . . 133
Overheated Engine Protection Operating Mode . . . . 334
Overheating, Engine . . . . . . . . . . . . 332
P
Park
Shifting Into . . . . . . . . . . . . . . . . . . . 226
Shifting Out of . . . . . . . . . . . . . . . . 227
Park Assist . . . . . . . . . . . . . . . . . . . . . 255
Parking
Brake and P (Park)Mechanism Check . . . . . . . . . . 344
Extended . . . . . . . . . . . . . . . . . . . . . 228
Over Things That Burn . . . . . . . 228
Parking or Backing Assistance Systems . . . . . . . . . . 255
Passenger Airbag Status Indicator . . . . . . . . . . . . . . . . . . . . . . 148
Passenger Compartment Air Filter . . . . . . . . . . . . . . . . . . . . . . . . . . 195
Passenger Sensing System . . . . . 92
Pedestrian Ahead Indicator . . . . . 155
Perchlorate Materials Requirements, California . . . . . . 314
Personalization Vehicle . . . . . . . . . . . . . . . . . . . . . . . 168
Pickup Conversion to Chassis Cab . . . . . . . . . . . . . . . . . . 311
Power Door Locks . . . . . . . . . . . . . . . . . . . . . 46
Mirrors . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Outlets . . . . . . . . . . . . . . . . . . . . . . . 133