trailer CHEVROLET BLAZER 2021 Owner's Guide

Chevrolet Blazer Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
14608203) - 2021 - CRC - 10/29/20
252 Driving and Operating
Always check all trailer tire pressures before
each trip when the tires are cool. Low trailer
tire pressure is a leading cause of trailer tire
blowouts.
Trailer tires deteriorate over time. The trailer
tire sidewall will show the week and year
the tire was manufactured. Many trailer tire
manufacturers recommend replacing tires
more than six years old.
Overloading is another leading cause of
trailer tire blowouts. Never load your trailer
with more weight than the tires are
designed to support. The load rating is on
the trailer tire sidewall.
Always know the maximum speed rating for
the trailer tires before driving. This may be
significantly lower than the vehicle tire
speed rating. The speed rating may be on
the trailer tire sidewall. If the speed rating is
not shown, the default trailer tire speed
rating is 105 km/h (65 mph).Conversions and Add-Ons
Add-On Electrical Equipment
{Warning
The Data Link Connector (DLC) is used for
vehicle service and Emission Inspection/
Maintenance testing. SeeMalfunction
Indicator Lamp (Check Engine Light) 0100
. A device connected to the DLC —such
as an aftermarket fleet or driver-behavior
tracking device —may interfere with
vehicle systems. This could affect vehicle
operation and cause a crash. Such devices
may also access information stored in the
vehicle’s systems.
Caution
Some electrical equipment can damage
the vehicle or cause components to not
work and would not be covered by the
vehicle warranty. Always check with your
dealer before adding electrical equipment.
Add-on equipment can drain the vehicle's
12-volt battery, even if the vehicle is not
operating.
The vehicle has an airbag system. Before
attempting to add anything electrical to the
vehicle, see Servicing the Airbag-Equipped
Vehicle 058 and
Adding Equipment to the Airbag-Equipped
Vehicle 059.

Chevrolet Blazer Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
14608203) - 2021 - CRC - 10/29/20
282 Vehicle Care
FusesUsage
F2 Starter 1
F3 DC DC transformer 1
F4 –
F5 DC DC transformer 2
F6 –
F7 Front blower
F8 Starter 3
F9 –
F10 –
F11 –
F12 Front wiper
F13 Starter 2
F14 –
F15 Rear wiper
F16 –
F17 –
F18 –
F19 –
F20 –
F21 – Fuses
Usage
F22 Electronic brake control module
F23 Parking/Trailer lamps
F24 Right trailer stoplamp/ Turnlamp
F25 Steering column lock
F26 –
F27 Left trailer stoplamp/ Turnlamp
F28 –
F29 –
F30 Washer pump F31 Spare/Right low-beam headlamp
F32 Left low-beam headlamp
F33 High-beam headlamp shutter/ Fog lamps
F34 Horn F35 –
F36 Right low-beam/Left high-beam headlamp Fuses
Usage
F37 Spare/Right high-beam headlamp
F38 Automatic headlamp leveling motor
F39 Transmission control module
F40 Left rear bus electrical center/DC DC ignition
F41 Instrument cluster
F42 Heating, ventilation, and air conditioning/
Central gateway
module run/crank
F43 Reflective light alert display
F44 Electronic brake control module/Electric brake
booster/Run/crank
F45 –
F46 –
F47 –
F48 –
F49 Interior rearview mirror

Chevrolet Blazer Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
14608203) - 2021 - CRC - 10/29/20
286 Vehicle Care
FusesUsage
F1 –
F2 Trailer battery Fuses
Usage
F3 –
F4 Rear blower Fuses
Usage
F5 Rear drive control 1
F6 –
F7 Right window
F8 Rear window defogger
F9 Left window
F10 –
F11 Trailer reverse
F12 –
F13 –
F14 –
F15 –
F16 –
F17 –
F18 –
F19 –
F20 Glove box door/Trailer stoplamp
F21 –
F22 –
F23 –

Chevrolet Blazer Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
14608203) - 2021 - CRC - 10/29/20
Vehicle Care 287
FusesUsage
F24 –
F25 –
F26 Trailer brake F27 Driver ventilated seat/ Lumbar
F28 Passive entry/Passive start
F29 –
F30 Canister vent F31 –
F32 Heated mirrors
F33 –
F34 Liftgate module F35 Fuel system control module/Fuel tank zone
module
F36 Passenger ventilated seat/Lumbar
F37 –
F38 Window module
F39 Rear closure Fuses
Usage
F40 Memory seat module F41 Automatic occupancy sensor
F42 –
F43 –
F44 –
F45 Liftgate motor
F46 Rear heated seats F47 –
F48 –
F49 –
F50 –
F51 –
F52 Rear drive control 2/ Semi-active dampening
system module
F53 Video
F54 External object calculating/Side blind
zone alert
F55 – Fuses
Usage
F56 Universal remote/Rain sensor
F57 Alarm overhead console/Theft deterrent
Circuit Breakers Usage CB1 –
CB2 –
CB3 Rear auxiliary power outlet
Relays Usage
K1 –
K2 –
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

Chevrolet Blazer Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
14608203) - 2021 - CRC - 10/29/20
Vehicle Care 321
Front Attachment Points
The vehicle is equipped with specific
attachment points to be used by the towing
provider. These holes may be used to pull
the vehicle from a flat road surface onto the
flatbed tow truck.
Recreational Vehicle Towing
Recreational vehicle towing means towing
the vehicle behind another vehicle, such as
behind a motor home. The two most
common types of recreational vehicle
towing are known as dinghy towing and
dolly towing. Dinghy towing is towing the
vehicle with all four wheels on the ground.Dolly towing is towing the vehicle with two
wheels on the ground and two wheels up
on a device known as a dolly.
Here are some important things to consider
before recreational vehicle towing:
.Before towing the vehicle, become
familiar with the local laws that apply to
recreational vehicle towing. These laws
may vary by region.
.The towing capacity of the towing
vehicle. Be sure to read the tow vehicle
manufacturer's recommendations.
.How far the vehicle will be towed. Some
vehicles have restrictions on how far and
how long they can be towed.
.The proper towing equipment. See your
dealer or trailering professional for
additional advice and equipment
recommendations.
.Whether the vehicle is ready to be towed.
Just as preparing the vehicle for a long
trip, make sure the vehicle is prepared to
be towed.
Caution
Use of a shield mounted in front of the
vehicle grille could restrict airflow and
cause damage to the transmission. The
repairs would not be covered by the
vehicle warranty. If using a shield, only
use one that attaches to the towing
vehicle.
Dinghy Towing
For vehicles being dinghy towed, the vehicle
should be run at the beginning of each day
and at each RV fuel stop for about
five minutes. This will ensure proper
lubrication of transmission components.
To tow the vehicle from the front with all
four wheels on the ground:
1. Position the vehicle to be towed and secure it to the towing vehicle.
2. Put the vehicle in N (Neutral).
3. Shut the engine off (vehicle will remain in accessory mode).
4. Disconnect the negative (−) terminal connector from the 12-volt battery.
5. Close the hood of the vehicle.

Chevrolet Blazer Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
14608203) - 2021 - CRC - 10/29/20
332 Service and Maintenance
Because of the way people use vehicles,
maintenance needs vary. There may need to
be more frequent checks and services. The
Additional Required Services - Normal are for
vehicles that:
.Carry passengers and cargo within
recommended limits on the Tire and
Loading Information label. SeeVehicle
Load Limits 0197.
.Are driven on reasonable road surfaces
within legal driving limits.
.Use the recommended fuel. See
Recommended Fuel 0239.
Refer to the information in the Maintenance
Schedule Additional Required Services -
Normal chart.
The Additional Required Services - Severe are
for vehicles that are:
.Mainly driven in heavy city traffic in hot
weather.
.Mainly driven in hilly or mountainous
terrain.
.Frequently towing a trailer.
.Used for high speed or competitive
driving.
.Used for taxi, police, or delivery service. Refer to the information in the Maintenance
Schedule Additional Required Services -
Severe chart.
{Warning
Performing maintenance work can be
dangerous and can cause serious injury.
Perform maintenance work only if the
required information, proper tools, and
equipment are available. If they are not,
see your dealer to have a trained
technician do the work. See
Doing Your
Own Service Work 0255.
Maintenance Schedule
Owner Checks and Services
Check the engine oil level. See Engine Oil
0 262.
Once a Month
.Check the tire inflation pressures. See Tire
Pressure 0294.
.Inspect the tires for wear. See Tire
Inspection 0300.
.Check the windshield washer fluid level.
See Washer Fluid 0272.
Engine Oil Change
When the CHANGE ENGINE OIL SOON
message displays, have the engine oil and
filter changed within the next 1 000 km/
600 mi. If driven under the best conditions,
the engine oil life system may not indicate
the need for vehicle service for up to a year.
The engine oil and filter must be changed at
least once a year and the oil life system
must be reset. Your trained dealer technician
can perform this work. If the engine oil life
system is reset accidentally, service the
vehicle within 5 000 km/3,000 mi since the
last service. Reset the oil life system when
the oil is changed. See Engine Oil Life
System 0264.
Engine Air Filter Change
When the REPLACE AT NEXT OIL CHANGE
message displays, the engine air filter
should be replaced at the next engine oil
change. When the REPLACE ENGINE AIR
FILTER SOON message displays, the engine
air filter should be replaced at the earliest
convenience. Reset the engine air filter life
system after the engine air filter is replaced.
See Engine Air Filter Life System 0265.

Chevrolet Blazer Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
14608203) - 2021 - CRC - 10/29/20
Index 377
StrutsGas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 277
Stuck Vehicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . 196
Summer Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . 289
Sun Visors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Sunglass Storage . . . . . . . . . . . . . . . . . . . . . . . . . 76
Sunroof . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 Navigation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145
System Engine Air Filter Life . . . . . . . . . . . . . . . . . . . 265
Forward Collision Alert (FCA) . . . . . . . . . . . 230
Global Positioning . . . . . . . . . . . . . . . . . . . . . 152
Infotainment . . . . . . . . . . . . . . . . . . . . . . . . . . . 359
OnStar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151
Roof Rack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
Systems Driver Assistance . . . . . . . . . . . . . . . . . . . . . . 225
T
Tachometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
Teen Driver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 171
Text Telephone (TTY) Users . . . . . . . . . . . . . . . 351
Theft-Deterrent Systems . . . . . . . . . . . . . . . . . . 24Immobilizer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 287
All-Season . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 288 Tires (cont'd)
Buying New Tires . . . . . . . . . . . . . . . . . . . . . . 302
Chains . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 305
Changing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 313
Compact Spare . . . . . . . . . . . . . . . . . . . . . . . . . 317
Designations . . . . . . . . . . . . . . . . . . . . . . . . . . . 291
Different Size . . . . . . . . . . . . . . . . . . . . . . . . . . 303
If a Tire Goes Flat . . . . . . . . . . . . . . . . . . . . . 306
Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300
Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . 294, 295
Pressure Light . . . . . . . . . . . . . . . . . . . . . . . . . 105
Pressure Monitor Operation . . . . . . . . . . . 297
Pressure Monitor System . . . . . . . . . . . . . . 296
Rotation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300
Sealant and Compressor Kit . . . . . . . . . . . . 307
Sealant and Compressor Kit,
Storing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 313
Sidewall Labeling . . . . . . . . . . . . . . . . . . . . . . 289
Terminology and Definitions . . . . . . . . . . . 292
Uniform Tire Quality Grading . . . . . . . . . . 303
Wheel Alignment and Tire Balance . . . . 305
Wheel Replacement . . . . . . . . . . . . . . . . . . . . 305
When It Is Time for New Tires . . . . . . . . . 301
Winter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 288
Top Tier Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . 239
Tow/Haul Mode . . . . . . . . . . . . . . . . . . . . . . . . . 210
Tow/Haul Mode Light . . . . . . . . . . . . . . . . . . . 103 Towing
Driving Characteristics . . . . . . . . . . . . . . . . . 242
Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 248
General Information . . . . . . . . . . . . . . . . . . . 242
Recreational Vehicle . . . . . . . . . . . . . . . . . . . 321
Trailer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 245
Trailer Sway Control (TSC) . . . . . . . . . . . . . 251
Vehicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 320
Traction Control System (TCS)/StabiliTrakLight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104
Off Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104
Traction Control/Electronic Stability Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 213
Trademarks and License Agreements . . . . . . 173
Trailer Sway Control (TSC) . . . . . . . . . . . . . . . . . . . . 251
Towing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 245
Transmission Automatic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 207
Fluid, Automatic . . . . . . . . . . . . . . . . . . . . . . . 265
Transportation Program, Courtesy . . . . . . . 354
Trip Odometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
Turn and Lane-Change Signals . . . . . . . . . . . .124
U
Uniform Tire Quality Grading . . . . . . . . . . . . 303
Universal Remote System . . . . . . . . . . . . . . . . . 117