2022 CHEVROLET BLAZER overheating

Chevrolet Blazer Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
15165663) - 2022 - CRC - 4/27/21
272 Vehicle Care
{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
needs to be checked and replaced at
appropriate intervals. SeeMaintenance
Schedule 0339.
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 0274.
What to Use
{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
(Continued)
Warning (Continued)
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.
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.
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 vehicle must be on a level surface when
checking the coolant level.
Check to see if coolant is visible in the
coolant surge tank. If the coolant inside the
coolant surge tank is boiling, do not do
anything else until it cools down. See
Engine
Overheating 0274.

Chevrolet Blazer Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
15165663) - 2022 - CRC - 4/27/21
274 Vehicle Care
3. Fill the coolant surge tank with theproper mixture to the indicated
level mark.
4. With the coolant surge tank pressure cap off, start the engine and let it run until
you can feel the upper radiator hose
getting hot. Watch out for the engine
cooling fan.
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
level 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.
If the coolant still is not at the proper
level when the system cools down again,
see your dealer.
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.
2.0L L4 Engine Only - Automatic Coolant
Service Fill Instructions
If equipped, this feature assists in filling and
removing air from the cooling system after
service of components or when coolant is
added after being too low.
To activate the fill and air removal process:
1. With a cold system, add coolant to the indicated mark on the surge tank.
2. Replace the cap on the surge tank.
3. Connect the vehicle to a battery charger.
4. Turn the ignition to Service Mode. See Ignition Positions 0205. 5. Turn off the air conditioning.
6. Set the parking brake.
7. At the same time, press the accelerator
and the brake 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 two minutes, and repeat
Steps 4–7.
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 4–7. The
fill and air removal process will run for
approximately 10 minutes.
Engine Overheating
The vehicle has several indicators to warn of
the engine overheating.
There is an engine coolant temperature
gauge on the instrument cluster. See Engine
Coolant Temperature Gauge 099. The
vehicle may also display a message on the
Driver Information Center (DIC).

Chevrolet Blazer Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
15165663) - 2022 - CRC - 4/27/21
Vehicle Care 275
If the decision is made not to lift the hood
when this warning appears, get service help
right away. SeeRoadside Assistance Program
0 358.
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 fan is running. If the engine is
overheating, the fan should be running. If it
is not, do not continue to run the engine.
Have the vehicle serviced.
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.
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 (Continued)
Warning (Continued)
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.
If the overheat warning is displayed with no
sign of steam: 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. If the engine coolant temperature gauge is
no longer in the overheated area, the
vehicle can be driven. Continue to drive the
vehicle slowly for about 10 minutes. Keep a
safe 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 no sign of steam, idle the engine
for three minutes while parked. If the
warning is still displayed, turn off the
engine until it cools down.
Washer Fluid
What to Use
When windshield washer fluid is needed, be
sure to read the manufacturer's instructions
before use. If operating the vehicle in an
area where the temperature may fall below
freezing, use a fluid that has sufficient
protection against freezing.

Chevrolet Blazer Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
15165663) - 2022 - CRC - 4/27/21
Vehicle Care 293
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 Limits0201.
.Underinflated tires pose the same
danger as overloaded tires. The
resulting crash could cause serious
injury. Check all tires frequently to
(Continued)
Warning (Continued)
maintain the recommended
pressure. Tire pressure should be
checked when the tires are cold.
.Overinflated tires are more likely
to be cut, punctured, or broken by
a sudden impact —such as when
hitting a pothole. Keep tires at the
recommended pressure.
.Worn or old tires can cause a
crash. If the tread is badly worn,
replace them.
.Replace any tires that have been
damaged by impacts with
potholes, curbs, etc.
.Improperly repaired tires can cause
a crash. Only your dealer or an
authorized tire service center
should repair, replace, dismount,
and mount the tires.
(Continued)
Warning (Continued)
.Do not spin the tires in excess of
56 km/h (35 mph) on slippery
surfaces such as snow, mud, ice,
etc. Excessive spinning may cause
the tires to explode.
See Tire Pressure for High-Speed
Operation 0300 for inflation pressure
adjustment for high-speed driving.
All-Season Tires
This vehicle may come with all-season tires.
These tires are designed to provide good
overall performance on most road surfaces
and weather conditions. Original equipment
tires designed to GM's specific tire
performance criteria have a TPC specification
code molded onto the sidewall. Original
equipment all-season tires can be identified
by the last two characters of this TPC code,
which will be “MS.”
Consider installing winter tires on the
vehicle if frequent driving on snow or
ice-covered roads is expected. All-season tires
provide adequate performance for most
winter driving conditions, but they may not

Chevrolet Blazer Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
15165663) - 2022 - CRC - 4/27/21
Vehicle Care 299
Vehicle Placard:A label permanently
attached to a vehicle showing the
vehicle capacity weight and the original
equipment tire size and recommended
inflation pressure. See “Tire and Loading
Information Label” underVehicle Load
Limits 0201.
Tire Pressure
Tires need the correct amount of air
pressure to operate effectively.
{Warning
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:
(Continued)
Warning (Continued)
.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. See Vehicle Load Limits 0201.
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 pressure of the tires once a
month or more. Do not forget the
compact spare, if the vehicle has one.
The compact spare cold tire pressure
should be at 420 kPa (60 psi). See
Compact Spare Tire
0322.
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

Chevrolet Blazer Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
15165663) - 2022 - CRC - 4/27/21
Index 377
Driver Mode Control . . . . . . . . . . . . . . . . . . . . . 219
Driver Mode Control Light . . . . . . . . . . . . . . . 108
DrivingAssistance Systems . . . . . . . . . . . . . . . . . . . . 236
Better Fuel Economy . . . . . . . . . . . . . . . . . . . 192
Characteristics and Towing Tips . . . . . . . . 247
Defensive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 193
Hill and Mountain Roads . . . . . . . . . . . . . . 199
If the Vehicle is Stuck . . . . . . . . . . . . . . . . . 201
Impaired . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 193
Loss of Control . . . . . . . . . . . . . . . . . . . . . . . . 195
Off-Road . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 195
Off-Road Recovery . . . . . . . . . . . . . . . . . . . . . 195
Vehicle Load Limits . . . . . . . . . . . . . . . . . . . . 201
Wet Roads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 199
Winter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200
Dual Automatic Climate Control System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 186
E
Electric Brake Boost . . . . . . . . . . . . . . . . . . . . . . . 215
Electric Parking Brake . . . . . . . . . . . . . . . . . . . . . 215
Electric Parking Brake Light . . . . . . . . . . . . . . 105
Electrical Equipment, Add-On . . . . . . . . . . . . 257
Electrical SystemEngine Compartment Fuse Block . . . . . . . 285
Fuses and Circuit Breakers . . . . . . . . . . . . . 284
Instrument Panel Fuse Block . . . . . . . . . . . 288 Electrical System (cont'd)
Overload . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 282
Rear Compartment Fuse Block . . . . . . . . . 290
Emergency OnStar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 367
Engine Air Cleaner/Filter . . . . . . . . . . . . . . . . . . . . . . 270
Check Light (Malfunction Indicator) . . . . 103
Compartment Overview . . . . . . . . . . . . . . . . 263
Coolant Temperature Gauge . . . . . . . . . . . . 99
Coolant Temperature WarningLight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108
Cooling System . . . . . . . . . . . . . . . . . . . . . . . . . 271
Drive Belt Routing . . . . . . . . . . . . . . . . . . . . . 354
Exhaust . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 211
Heater . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 208
Oil Life System . . . . . . . . . . . . . . . . . . . . . . . . 268
Oil Pressure Light . . . . . . . . . . . . . . . . . . . . . . 109
Overheating . . . . . . . . . . . . . . . . . . . . . . . . . . . 274
Power Messages . . . . . . . . . . . . . . . . . . . . . . . . 116
Running While Parked . . . . . . . . . . . . . . . . . . 211
Starting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 206
Engine Air Filter Life System . . . . . . . . . . . . . 269
Engine Oil Temperature Gauge . . . . . . . . . . . . . . . . . . . . . 99
Entry Lighting . . . . . . . . . . . . . . . . . . . . . . . . . . . 129
Equipment, Towing . . . . . . . . . . . . . . . . . . . . . . 254
Event Data Recorders . . . . . . . . . . . . . . . . . . . . 365 Exit Lighting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129
Extended Parking . . . . . . . . . . . . . . . . . . . . . . . . . 211
Extender, Seat Belt . . . . . . . . . . . . . . . . . . . . . . . 50
Exterior Lamp Controls . . . . . . . . . . . . . . . . . . . .124
Exterior Lamps Off Reminder . . . . . . . . . . . . . 125
Exterior Lighting Battery Saver . . . . . . . . . . 130
F
Filter,
Engine Air Cleaner . . . . . . . . . . . . . . . . . . . . . 270
Flash-to-Pass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126
Flashers, Hazard Warning . . . . . . . . . . . . . . . . . 127
Flat Tire . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 311 Changing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 318
Floor Mats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 336
Fluid Automatic Transmission . . . . . . . . . . . . . . . 269
Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 277
Washer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 275
Folding Mirrors . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Forward Collision Alert (FCA) System . . . . 236
Frequency Statement Radio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 363
Front Pedestrian Braking (FPB) System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 239
Front Seats
Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Heated and Ventilated . . . . . . . . . . . . . . . . . . 41

Chevrolet Blazer Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
15165663) - 2022 - CRC - 4/27/21
380 Index
Loss of Control . . . . . . . . . . . . . . . . . . . . . . . . . . 195
Low Fuel Warning Light . . . . . . . . . . . . . . . . . 109
Lower Anchors and Tethers forChildren (LATCH System) . . . . . . . . . . . . . . . . 68
Lumbar Adjustment . . . . . . . . . . . . . . . . . . . . . . . 38 Front Seats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
M
MaintenanceRecords . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 350
Maintenance and Care Additional . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 344
Maintenance Schedule . . . . . . . . . . . . . . . . . . . 339 Recommended Fluids andLubricants . . . . . . . . . . . . . . . . . . . . . . . . . . . . 347
Malfunction Indicator Lamp . . . . . . . . . . . . . . 103
Manual Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . 213
Map Data Updates . . . . . . . . . . . . . . . . . . . . . . . . 155
Maps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .147
Media Avoiding Untrusted Devices . . . . . . . . . . . . 140
Memory Seats . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Messages Engine Power . . . . . . . . . . . . . . . . . . . . . . . . . . . 116
Vehicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116
Vehicle Speed . . . . . . . . . . . . . . . . . . . . . . . . . . . 117
Mirror Rear Camera . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 Mirrors
Automatic Dimming . . . . . . . . . . . . . . . . . . . . 26
Automatic Dimming Rearview . . . . . . . . . . 26
Convex . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Folding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Heated . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Manual Rearview . . . . . . . . . . . . . . . . . . . . . . . 26
Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Tilt in Reverse . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Mirrors, Interior Rearview . . . . . . . . . . . . . . . . . 26
Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 219 Driver Control . . . . . . . . . . . . . . . . . . . . . . . . . 219
Monitor System, Tire Pressure . . . . . . . . . . . 301
Multi-band Antenna . . . . . . . . . . . . . . . . . . . . . 140
N
Navigation Connected Services . . . . . . . . . . . . . . . . . . . . . 371
Destination . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148
Using the System . . . . . . . . . . . . . . . . . . . . . . 144
Navigation Symbols . . . . . . . . . . . . . . . . . . . . . .147
New Vehicle Break-In . . . . . . . . . . . . . . . . . . . . 204
O
Odometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
Trip . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
Off-Road . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 195
Driving . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 195
Recovery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 195 Oil
Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 266
Engine Oil Life System . . . . . . . . . . . . . . . . . 268
Pressure Light . . . . . . . . . . . . . . . . . . . . . . . . . 109
Older Children, Restraints . . . . . . . . . . . . . . . . . 62
Online Owner Center . . . . . . . . . . . . . . . . . . . . 357
OnStar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 365
OnStar Additional Information . . . . . . . . . . . 368
OnStar Emergency . . . . . . . . . . . . . . . . . . . . . . . 367
OnStar Overview . . . . . . . . . . . . . . . . . . . . . . . . . 366
OnStar Security . . . . . . . . . . . . . . . . . . . . . . . . . . 367
Outlets Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
Overheating, Engine . . . . . . . . . . . . . . . . . . . . . 274
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132 Instrument Panel . . . . . . . . . . . . . . . . . . . . . . . . 4
P
Park
Shifting Into . . . . . . . . . . . . . . . . . . . . . . . . . . . 209
Shifting Out of . . . . . . . . . . . . . . . . . . . . . . . . 210
Park Assist . . . . . . . . . . . . . . . . . . . . . . . . . . . 231, 234
Parking Brake and P (Park) MechanismCheck . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 279
Extended . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 211
Over Things That Burn . . . . . . . . . . . . . . . . . 210