radiator cap CHEVROLET EXPRESS 2022 Owners Manual

Chevrolet Express Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
15555951) - 2022 - CRC - 1/27/22
Vehicle Care 177
1.Battery - North America 0191.
2. Radiator Pressure Cap. See Cooling
System 0183.
3. Coolant Recovery Tank. See Cooling
System 0183.
4. Engine Cooling Fan (Out of View). See Cooling System 0183.
5. Engine Air Cleaner/Filter 0182.
6. Engine Oil Dipstick. See “Checking Engine
Oil” under Engine Oil 0179.
7. Engine Oil Fill Cap. See “When to Add
Engine Oil” underEngine Oil 0179.
8. Power Steering Fluid Reservoir. See Power Steering Fluid 0188.
9. Engine Compartment Fuse Block 0199.
10. Brake Master Cylinder Reservoir. See Brake Fluid 0190.
11. Windshield Washer Fluid Reservoir. See “Adding Washer Fluid” underWasher
Fluid 0189.

Chevrolet Express Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
15555951) - 2022 - CRC - 1/27/22
178 Vehicle Care
6.6L V8 Engine
1. Battery - North America 0191.
2. Radiator Pressure Cap. See Cooling
System 0183.
3. Coolant Recovery Tank. See Cooling
System 0183. 4. Engine Oil Dipstick. See
“Checking Engine
Oil” under Engine Oil 0179.
5. Engine Cooling Fan (Out of View). See Cooling System 0183.
6. Engine Air Cleaner/Filter 0182. 7. Engine Oil Fill Cap. See
“When to Add
Engine Oil” underEngine Oil 0179.
8. Power Steering Fluid Reservoir. See Power Steering Fluid 0188.
9. Engine Compartment Fuse Block 0199.

Chevrolet Express Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
15555951) - 2022 - CRC - 1/27/22
Vehicle Care 183
6.6L V8 Engine
To inspect and replace the filter: 1. Remove the six screws, slide the top cover forward and lift, to gain access to
the air cleaner/filter.
2. Remove the air cleaner/filter from the housing base. Take care to dislodge as
little dirt as possible.
{Warning
If part replacement is necessary, the part
must be replaced with one of the same
part number or with an equivalent part.
Use of a replacement part without the
(Continued)
Warning (Continued)
same fit, form, and function may result
in personal injury or damage to the
vehicle.
3. Clean the air cleaner/filter sealing surface and housing base.
4. Install the engine air cleaner/filter in the housing base.
5. Install the top cover by sliding it into position on the housing base, and secure
using six screws.
See Maintenance Schedule 0245 to
determine when to replace the engine air
cleaner/filter.
{Warning
Operating the engine with the air
cleaner/filter off can cause you or others
to be burned. Use caution when working
on the engine. Do not start the engine or
drive the vehicle with the air cleaner/
filter off, as flames may be present if the
engine backfires.
Caution
If the air cleaner/filter is off, dirt can
easily get into the engine, which could
damage it. Always have the air cleaner/
filter in place when driving.
Cooling System
The cooling system allows the engine to
maintain the correct working temperature.
4.3L V6 Engine
1. Radiator Pressure Cap
2. Coolant Recovery Tank
3. Engine Cooling Fan (Out of View)

Chevrolet Express Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
15555951) - 2022 - CRC - 1/27/22
184 Vehicle Care
6.6L V8 Engine
1. Radiator Pressure Cap
2. Coolant Recovery Tank
3. Engine Cooling Fan (Out of View)
{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 or radiator 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, seeEngine Overheating 0187.
What to Use
{Warning
Plain water, or other liquids such as
alcohol, can boil before the proper
coolant mixture will. With plain water or
(Continued)
Warning (Continued)
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. If using this
mixture, nothing else needs to be added.
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.
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.

Chevrolet Express Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
15555951) - 2022 - CRC - 1/27/22
186 Vehicle Care
Warning (Continued)
including the pressure cap, is hot. Wait
for the cooling system and pressure cap
to cool.
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 coolant is needed, add the proper
DEX-COOL coolant mixture at the coolant
recovery tank.
How to Add Coolant to the Radiator
{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, (Continued)
Warning (Continued)
including the pressure cap, is hot. Wait
for the cooling system and pressure cap
to cool.
If coolant is needed, add the proper mixture
directly to the radiator, but be sure the
cooling system is cool before this is done.
1. Remove the radiator pressure cap when the cooling system, including the
radiator pressure cap and upper radiator
hose, is no longer hot. Turn the pressure
cap slowly counterclockwise until it first
stops. Do not press down while turning
the pressure cap.
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, but now push down as you turn it. Remove the
pressure cap. 3. Fill the radiator with the proper mixture,
up to the base of the filler neck. See
Recommended Fluids and Lubricants
0251 for more information about the
proper coolant mixture.
4. Remove the coolant recovery tank cap
and fill to the COLD FILL mark.
5. Reinstall the cap back on the coolant recovery tank, but leave the radiator
pressure cap off.
6. Start the engine and let it run until the upper radiator hose can be felt getting
hot. Watch out for the engine
cooling fan.

Chevrolet Express Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
15555951) - 2022 - CRC - 1/27/22
Vehicle Care 187
7. By this time, the coolant level inside theradiator filler neck may be lower. If the
level is lower, add more of the proper
mixture through the filler neck until the
level reaches the base of the filler neck.
8. Replace the pressure cap. At any time during this procedure if coolant begins to
flow out of the filler neck, reinstall the
pressure cap.
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 a 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. The vehicle has an indicator to warn of
engine overheating.
There is an engine coolant temperature
gauge on the vehicle's instrument cluster.
See
Engine Coolant Temperature Gauge
0 74.
If the decision is made not to lift the hood
when this warning appears, but instead get
service help right away, see Roadside
Assistance Program 0262.
If the decision is made to lift the hood,
make sure the vehicle is parked on a level
surface.
Then check to see if the engine cooling fans
are running. If the engine is overheating, the
fan should be running. If it is not, do not
continue to run the engine and have the
vehicle serviced.
See if the engine cooling fan speed increases
when idle speed is doubled by pushing the
accelerator pedal down. If it does not, the
vehicle needs service. Turn off the engine.
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
If an engine overheat warning is displayed
but no steam can be 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 “Driving on Grades”
under Trailer Towing 0159.