2020 CHEVROLET SILVERADO engine coolant

Chevrolet Silverado Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
13337620) - 2020 - CTC - 1/27/20
Driving and Operating 319
Adding a Snow Plow or
Similar Equipment
Caution
Do not exceed 72 km/h (45 mph)
with a snow plow mounted to the
vehicle. The vehicle could
overheat and be damaged.
Before installing a snow plow on the
vehicle, follow these guidelines:
Caution
If the vehicle does not have the
snow plow prep package, RPO
VYU, adding a plow can damage
the vehicle, and the repairs would
not be covered by the vehicle
warranty. Unless the vehicle was
built to carry a snow plow, do not
add one to the vehicle. If the
vehicle has RPO VYU, then the
payload the vehicle can carry will
be reduced when a snow plow is (Continued)
Caution (Continued)
installed. The vehicle can be
damaged if either the front or rear
axle ratings or the Gross Vehicle
Weight Rating (GVWR) are
exceeded.
The plow the vehicle can carry
depends on many things, such as:
. The options the vehicle came
with, and the weight of those
options.
. The weight and number of
passengers to be carried.
. The weight of items added to the
vehicle, like a tool box or
truck cap.
. The total weight of any
additional cargo to be carried.
For example, if the snow plow
weighs 318 kg (700 lb), the total
weight of all occupants and cargo
inside the cab should not exceed
135 kg (300 lb). This means that you
may only be able to carry one
passenger. Even this may be too much if there is other equipment
already adding to the weight of the
vehicle.
To safely carry a snow plow on the
vehicle:
.
Follow all aftermarket snow plow
manufacturer ’s instructions for
the operation and transportation
of the snow plow.
. With a snow plow attached, the
engine coolant temperature
gauge may show a higher
temperature than while driving
without one. The snow plow
could block the airflow to the
radiator. This could be more
noticeable as vehicle speed
increases. At speeds above
72 km (45 mph), this may cause
the engine coolant to overheat.
. To increase the airflow, move the
snow plow blade postion.
. If driving more than 24 km
(15 mi), angle the plow blade
position.
. Make sure the weight on the
front and rear axles does not
exceed the axle rating for each.

Chevrolet Silverado Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
13337620) - 2020 - CTC - 1/27/20
Vehicle Care 329
1. Remote Negative (–) Location.See Jump Starting - North
America 0415.
2. Positive (+) Terminal (Under Cover). See Jump Starting -
North America 0415.
3. Battery - North America 0354.
4. Engine Compartment Fuse
Block 0367.
5. Engine Cooling Fans (Out of View). See Cooling System
0 342.
6. Engine Oil Fill Cap. See “When
to Add Engine Oil” under
Engine Oil 0335.
7. Engine Oil Dipstick. See “Checking Engine Oil” under
Engine Oil 0335.
8. Coolant Surge Tank and Pressure Cap. See Cooling
System 0342.
9. Engine Air Cleaner/Filter 0340.
10. Brake Fluid Reservoir. See Brake Fluid 0353. 11. Windshield Washer Fluid
Reservoir. See “Adding Washer
Fluid” under Washer Fluid
0 350.

Chevrolet Silverado Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
13337620) - 2020 - CTC - 1/27/20
Vehicle Care 331
1. Remote Negative (–) Location.See Jump Starting - North
America 0415.
2. Positive (+) Terminal (Under Cover). See Jump Starting -
North America 0415.
3. Battery - North America 0354.
4. Engine Compartment Fuse
Block 0367.
5. Engine Cooling Fans (Out of View). See Cooling System
0 342.
6. Engine Oil Dipstick. See “Checking Engine Oil” under
Engine Oil 0335.
7. Engine Oil Fill Cap. See “When
to Add Engine Oil” under
Engine Oil 0335.
8. Coolant Surge Tank and Pressure Cap. See Cooling
System 0342.
9. Engine Air Cleaner/Filter 0340.
10. Brake Fluid Reservoir. See Brake Fluid 0353. 11. Windshield Washer Fluid
Reservoir. See “Adding Washer
Fluid” under Washer Fluid
0 350.

Chevrolet Silverado Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
13337620) - 2020 - CTC - 1/27/20
Vehicle Care 333
1. Remote Negative (–) Location.See Jump Starting - North
America 0415.
2. Positive (+) Terminal (Under Cover). See Jump Starting -
North America 0415.
3. Battery - North America 0354.
4. Engine Compartment Fuse
Block 0367.
5. Engine Oil Dipstick. See “Checking Engine Oil” under
Engine Oil 0335.
6. Engine Cooling Fans (Out of View). See Cooling System
0 342.
7. Engine Oil Fill Cap. See “When
to Add Engine Oil” under
Engine Oil 0335.
8. Coolant Surge Tank and Pressure Cap. See Cooling
System 0342.
9. Engine Air Cleaner/Filter 0340.
10. Brake Fluid Reservoir. See Brake Fluid 0353. 11. Windshield Washer Fluid
Reservoir. See “Adding Washer
Fluid” under Washer Fluid
0 350.

Chevrolet Silverado Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
13337620) - 2020 - CTC - 1/27/20
Vehicle Care 335
1. Remote Negative (–) Location.See Jump Starting - North
America 0415.
2. Positive (+) Terminal (Under Cover). See Jump Starting -
North America 0415.
3. Battery - North America 0354.
4. Engine Air Cleaner/Filter 0340.
5. Engine Oil Dipstick. See “Checking Engine Oil” under
Engine Oil 0335.
6. Engine Cooling Fan (Out of View). See Cooling System
0 342.
7. Power Steering Fluid Reservoir. See Power Steering
Fluid 0350.
8. Engine Oil Fill Cap. See “When
to Add Engine Oil” under
Engine Oil 0335.
9. Auxiliary Battery. Battery -
North America 0354.
10. Brake Fluid Reservoir. See Brake Fluid 0353.
11. Engine Compartment Fuse
Block 0367. 12. Coolant Surge Tank and
Pressure Cap. See Cooling
System 0342.
13. Windshield Washer Fluid Reservoir. See “Adding Washer
Fluid” under Washer Fluid
0 350.
If the vehicle has a diesel engine,
see the Duramax diesel
supplement.
Engine Oil
For diesel engine vehicles, see
“Engine Oil” in the Duramax diesel
supplement.
To ensure proper engine
performance and long life, careful
attention must be paid to engine oil.
Following these simple, but
important steps will help protect
your investment:
. Use engine oil approved to the
proper specification and of the
proper viscosity grade. See
“Selecting the Right Engine Oil”
in this section. .
Check the engine oil level
regularly and maintain the
proper oil level. See “Checking
Engine Oil” and“When to Add
Engine Oil” in this section.
. Change the engine oil at the
appropriate time. See Engine Oil
Life System 0337.
. Always dispose of engine oil
properly. See “What to Do with
Used Oil” in this section.Checking Engine Oil
Check the engine oil level regularly,
every 650 km (400 mi), especially
prior to a long trip. The engine oil
dipstick handle is a loop. See
Engine Compartment Overview
0328 for the location.
{Warning
The engine oil dipstick handle
may be hot; it could burn you.
Use a towel or glove to touch the
dipstick handle.

Chevrolet Silverado Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
13337620) - 2020 - CTC - 1/27/20
342 Vehicle Care
Cooling System
If the vehicle has the Duramax
diesel engine, see the Duramax
diesel supplement.
The cooling system allows the
engine to maintain the correct
working temperature.
2.7L L4 Engine (L3B)
4.3L V6 Engine (LV3)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.

Chevrolet Silverado Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
13337620) - 2020 - CTC - 1/27/20
Vehicle Care 343
6.6L V8 Engine (L8T)
1. Engine Cooling Fan (Outof View)
2. Coolant Surge Tank and Pressure Cap
{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
(Continued)
Warning (Continued)
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,
seeEngine Overheating 0347.
What to Use
{Warning
Plain water, or other liquids such
as alcohol, can boil before the
proper coolant mixture will. With
(Continued)
Warning (Continued)
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.
. Helps keep the proper engine
temperature.

Chevrolet Silverado Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
13337620) - 2020 - CTC - 1/27/20
344 Vehicle Care
Caution
Do not use anything other than a
mix of DEX-COOL coolant that
meets GM Standard
GMW3420 and clean, drinkable
water. Anything else can cause
damage to the engine cooling
system and the vehicle, which
would not be covered by the
vehicle warranty.
Never dispose of engine coolant by
putting it in the trash, or by 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 in the
engine compartment on the driver
side of the vehicle. See Engine
Compartment Overview 0328.
The vehicle must be on a level
surface when checking the coolant
level.
All Engines Except 6.6L V8 (L8T) Engine
6.6L V8 (L8T) Engine Only
Check to see if coolant is visible in
the coolant surge tank. If the coolant
inside the coolant surge tank is
boiling, wait until it cools down. The
coolant level should be at or above
the indicated mark. If it is not, there
may be a leak in the cooling
system.
If coolant is visible but the coolant
level is not at or above the indicated
mark, see the following sections on
how to add coolant to the coolant
surge tank following.