check engine CHEVROLET BLAZER 2023 Owner's Guide

Chevrolet Blazer Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
16401961) - 2023 - CRC - 5/17/22
268 Vehicle Care
Bulb Replacement
LED Lighting
This vehicle has several LED lamps. For
replacement of any LED lighting assembly,
contact your dealer.
Electrical System
High Voltage Devices and Wiring
{Warning
Exposure to high voltage can cause shock,
burns, and even death. The high voltage
components in the vehicle can only be
serviced by technicians with special
training.
High voltage components are identified
by labels. Do not remove, open, take
apart, or modify these components. High
voltage cable or wiring has orange
covering or labels. Do not probe, tamper
with, cut, or modify high voltage cable or
wiring.
Electrical System Overload
The vehicle has fuses and circuit breakers to
protect against an electrical system
overload.
When the current electrical load is too
heavy, the circuit breaker opens and closes,
protecting the circuit until the current load
returns to normal or the problem is fixed.
This greatly reduces the chance of circuit
overload and fire caused by electrical
problems.
Fuses and circuit breakers protect power
devices in the vehicle.
If there is a problem on the road and a fuse
needs to be replaced, the same amperage
fuse can be borrowed. Choose some feature
of the vehicle that is not needed to use and
replace it as soon as possible.
To check a fuse, look at the band inside the
fuse. If the band is broken or melted,
replace the fuse. Be sure to replace a bad
fuse with a fuse of the identical size and
rating.
Replacing a Blown Fuse
1. Turn off the vehicle.
2. Locate the fuse puller in the enginecompartment fuse block.

Chevrolet Blazer Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
16401961) - 2023 - CRC - 5/17/22
270 Vehicle Care
{Warning
Installation or use of fuses that do not
meet GM’s original fuse specifications is
dangerous. The fuses could fail, and result
in a fire. You or others could be injured
or killed, and the vehicle could be
damaged.
See Accessories and Modifications 0247 and
General Information 0247.
To check or replace a blown fuse, see
Electrical System Overload 0268.
Engine Compartment Fuse Block
The underhood fuse block is in the engine
compartment, on the driver side of the
vehicle.
Caution
Do not pull the engine compartment fuse
block lever, since it is intended only for
service purposes. If pulled, vehicle
malfunction may occur. To remove the fuse block cover, press the
clips on the cover and lift it straight up.
Caution
Spilling liquid on any electrical
component on the vehicle may damage
it. Always keep the covers on any
electrical component.
To remove fuses, use the fuse puller and
pull straight out.

Chevrolet Blazer Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
16401961) - 2023 - CRC - 5/17/22
Vehicle Care 283
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 for
internal combustion engine
vehicles
.Reduced range for electric vehicles
(Continued)
Warning (Continued)
Overinflated tires, or tires that have
too much air, can result in:
.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 0188. 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
spare, if the vehicle has one. The
compact spare cold tire pressure should
be at 420 kPa (60 psi). See
Compact
Spare Tire 0301.
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).

Chevrolet Blazer Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
16401961) - 2023 - CRC - 5/17/22
310 Vehicle Care
snow and ice. If the check engine light is
activated, please check to see if the shutter
system is clear of debris, snow or ice.
Windshield and Wiper Blades
Clean the outside of the windshield with
glass cleaner.
Clean rubber blades using a lint-free cloth or
paper towel soaked with windshield washer
fluid or a mild detergent. Wash the
windshield thoroughly when cleaning the
blades. Bugs, road grime, sap, and a buildup
of vehicle wash/wax treatments may cause
wiper streaking.
Replace the wiper blades if they are worn or
damaged. Damage can be caused by
extreme dusty conditions, sand, salt, heat,
sun, snow, and ice.
Weatherstrips
Apply weatherstrip lubricant on
weatherstrips to make them last longer, seal
better, and not stick or squeak. Lubricate
weatherstrips at least once a year. Hot, dry
climates may require more frequent
application. Black marks from rubber
material on painted surfaces can be removed
by rubbing with a clean cloth. See
Recommended Fluids and Lubricants0321.
Tires
Use a stiff brush with tire cleaner to clean
the tires.
Caution
Using petroleum-based tire dressing
products on the vehicle may damage the
paint finish and/or tires. When applying a
tire dressing, always wipe off any
overspray from all painted surfaces on
the vehicle.
Wheels and Wheel Trim
Use a soft, clean cloth with mild soap and
water to clean the wheels. After rinsing
thoroughly with clean water, dry with a
soft, clean towel. A wax may then be
applied.
Caution
Chrome wheels and chrome wheel trim
may be damaged if the vehicle is not
washed after driving on roads that have
been sprayed with magnesium chloride or
calcium chloride. These are used on roads
for conditions such as dust and ice.
Always wash the chrome with soap and
water after exposure.
Caution
To avoid surface damage on wheels and
wheel trim, do not use strong soaps,
chemicals, abrasive polishes, cleaners,
or brushes. Use only GM approved
cleaners. Do not drive the vehicle through
an automatic car wash that uses silicon
carbide tire/wheel cleaning brushes.
Damage could occur and the repairs
would not be covered by the vehicle
warranty.
Brake System
Visually inspect brake lines and hoses for
proper hook-up, binding, leaks, cracks,
chafing, etc. Inspect disc brake pads for wear
and rotors for surface condition. Inspect
drum brake linings/shoes for wear or cracks.
Inspect all other brake parts.
Steering, Suspension, and Chassis
Components
Visually inspect steering, suspension, and
chassis components for damaged, loose,
or missing parts or signs of wear at least
once a year.
Inspect power steering for proper electrical
connections, binding, cracks, chafing, etc.

Chevrolet Blazer Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
16401961) - 2023 - CRC - 5/17/22
Service and Maintenance 317
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 0188.
.Are driven on reasonable road surfaces
within legal driving limits.
.Use the recommended fuel. See
Recommended Fuel 0232.
Refer to the information in the Maintenance
Schedule Additional Required Services -
Normal Service.
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 Service.
{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 0247.
Maintenance Schedule
Tire Rotation and Required Services
Every 12 000 km (7,500 mi)
Tires are rotated to achieve a more uniform
wear for all tires. The first rotation is the
most important.
Anytime unusual wear is noticed, rotate the
tires as soon as possible, check for proper
tire inflation pressure, and check for
damaged tires or wheels. If the unusual
wear continues after the rotation, check the wheel alignment. See
When It Is Time for
New Tires 0290 and
Wheel Replacement 0294.
.Perform Multi-Point Vehicle Inspection.
See Multi-Point Vehicle Inspection (MPVI)
0 319.
.Lubricate body components. See Exterior
Care 0307.
Additional Required Services —Normal
Service
Every 12 000 km (7,500 mi)
.Check the engine oil level and oil
life percentage. If needed, change engine
the oil and filter, and reset oil the life
system. Or 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.

Chevrolet Blazer Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
16401961) - 2023 - CRC - 5/17/22
Service and Maintenance 319
suitable service maintenance intervals for
your vehicle, please contact your
authorized GM Dealer.
Extreme service is for vehicles mainly
driven off-road in four-wheel drive or used
in farming, mining, forestry, or snow
plowing.
Additional Required Services—Severe
Service
Every 72 000 km (45,000 mi)
.Change automatic transmission fluid.
Every 120 000 km (75,000 mi)
.Change rear axle fluid, if equipped with
AWD. Do not directly power wash the
transfer case and/or front/rear axle
output seals. High pressure water can
overcome the seals and contaminate the
transfer case fluid. Contaminated fluid will
decrease the life of the transfer case and/
or axles and should be replaced.
Owner Checks and Services
Every Five Years
.Replace brake fluid. Every Seven Years
.Replace Air Conditioning Desiccant and
perform air conditioning system
maintenance every seven years. This
service requires replacement of the
desiccant to help the longevity and
efficient operation of the air conditioning
system. This service can be complex. See
your dealer.
Multi-Point Vehicle
Inspection (MPVI)
A Multi Point Vehicle Inspection (MPVI)
completed by a GM dealer technician is a
maintenance assessment of your vehicle.
The benefit of the MPVI is to identify and
inform the customer of service items that
require immediate attention and those that
may require attention in the future.
The technician will perform the following
checks on your vehicle. For a complete list
of checks, inspections, and services, see your
dealer.
Some items may not apply to your vehicle
and/or region.
Diagnostics
.OnStar active, if equipped
.Service history/recall check
Engine Oil and Filter
.Engine oil
.Oil life monitor
‐
Reset oil life monitor
Exterior Lights
.Visual inspection
Windshield and Wipers
.Visual inspection
Battery
.Battery visual inspection
.Battery test results
.Battery cables and connections
Systems, Fluids, and Visible Leak
Inspection
.Engine oil
.Transmission
.Drive axle
.Transfer case
.Engine cooling system
.Power steering, if equipped
.Fuel system
.Windshield washer fluid

Chevrolet Blazer Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
16401961) - 2023 - CRC - 5/17/22
320 Service and Maintenance
Tire Inspection
.Tire pressure, tread depth, and wear
.Rotation, if applicable
.Alignment check, optional
.Reset tire pressure monitor
.Check tire sealant expiration date,
if equipped
.Check spare tire, if equipped
Brakes
.Check brake system
Visible and Functional Inspections
.Seat belt components
.Exhaust system
.Accelerator pedal
.Passenger compartment air filter,
if equipped
.Engine air filter
.Hoses
.Belts
.Shocks and struts
.Steering components
.Axle boots or driveshaft and u-joints
.Compartment lift struts, if equipped
.Floor mats secured, no interference with
pedals
.Horn
.Ignition lock, if equipped
.Starter switch
.Evaporative control system
Lubricate
.Chassis components
Special Application Services
.Severe Commercial Use Vehicles Only:
Lubricate chassis components every oil
change.
.Have underbody flushing service
performed. See "Underbody Maintenance"
in Exterior Care 0307.

Chevrolet Blazer Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
16401961) - 2023 - CRC - 5/17/22
Technical Data 327
ApplicationCapacities
Metric English
Fuel Tank
IFWD 73.4 L
19.4 gal
IAWD 82.1 L
21.7 gal
Wheel Nut Torque 190Y 140 lb ft
All capacities are approximate. When adding, be sure to fill to the approximate level, as recommended in this manual. Recheck fluid level
after filling.
*Engine cooling system capacity values are based on the entire cooling system and its components.
Engine Specifications
Engine VIN CodeTransmission Spark Plug Gap
2.0L L4 Engine (LSY) 4Automatic0.65–0.75 mm (0.026–0.030 in)
3.6L V6 Engine (LGX) SAutomatic 0.80–0.90 mm (0.031–0.035 in)
Spark plug gaps are preset by the manufacturer. Re-gapping the spark plug is not recommended and can damage the spark plug.

Chevrolet Blazer Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
16401961) - 2023 - CRC - 5/17/22
348 Index
IndexA
Accessories and Modifications . . . . . . . . . . . 247
Accessory Power . . . . . . . . . . . . . . . . . . . . . . . . . 196
ActiveFuel Management . . . . . . . . . . . . . . . . . . . . . 198
Adaptive Cruise Control . . . . . . . . . . . . . . . . . . . . . . . . . 209
Add-On Electrical Equipment . . . . . . . . . . . . . 245
Additional OnStar Information . . . . . . . . . . . . . . . . . . . . 342
Adjustments Lumbar, Front Seats . . . . . . . . . . . . . . . . . . . . 39
Agreements Trademarks and License . . . . . . . . . . . . . . . 166
Air Cleaner/Filter, Engine . . . . . . . . . . . . . . . . . . 256
Conditioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . 173
Filter Life System . . . . . . . . . . . . . . . . . . . . . . 256
Filter, Passenger Compartment . . . . . . . . . 177
Vents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 177
Airbag System . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52 Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
How Does an Airbag Restrain? . . . . . . . . . . 56
Passenger Sensing System . . . . . . . . . . . . . . 57
What Makes an Airbag Inflate? . . . . . . . . . 56
What Will You See after an AirbagInflates? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
When Should an Airbag Inflate? . . . . . . . . 55 Airbag System (cont'd)
Where Are the Airbags? . . . . . . . . . . . . . . . . 54
Airbags Adding Equipment to the Vehicle . . . . . . . 61
Passenger Status Indicator . . . . . . . . . . . . . 100
Readiness Light . . . . . . . . . . . . . . . . . . . . . . . . . 99
Replacing System Parts after aCrash . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Servicing Airbag-Equipped Vehicles . . . . . . 60
Alarm Vehicle Security . . . . . . . . . . . . . . . . . . . . . . . . 24
Alert
Lane Change . . . . . . . . . . . . . . . . . . . . . . . . . . . 229
Rear Cross Traffic . . . . . . . . . . . . . . . . . . . . . . 223
Side Blind Zone (SBZA) . . . . . . . . . . . . . . . . . 228
All-Season Tires . . . . . . . . . . . . . . . . . . . . . . . . . . 277
All-Wheel Drive . . . . . . . . . . . . . . . . . . . . . .201, 265
AM-FM Radio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131
Antenna
Multi-band . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134
Antilock Brake System (ABS) . . . . . . . . . . . . . 202
Warning Light . . . . . . . . . . . . . . . . . . . . . . . . . 104
Appearance Care Exterior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 307
Interior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 311
Apple CarPlay and Android Auto . . . . . . . . . .158
Armrest
Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

Chevrolet Blazer Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
16401961) - 2023 - CRC - 5/17/22
Index 349
Assistance Program, Roadside . . . . . . . . . . . . 332
Assistance SystemsDriving . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 223
Parking and Backing . . . . . . . . . . . . . . . . . . . 218
Audio Bluetooth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137
Automatic
Dimming Mirrors . . . . . . . . . . . . . . . . . . . . . . . 27
Door Locks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Emergency Braking (AEB) . . . . . . . . . . . . . . 225
Headlamp System . . . . . . . . . . . . . . . . . . . . . 120
Transmission . . . . . . . . . . . . . . . . . . . . . . . . . . . 199
Transmission Fluid . . . . . . . . . . . . . . . . . . . . . 255
Automatic Transmission Manual Mode . . . . . . . . . . . . . . . . . . . . . . . . . 201
Auxiliary
Jack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137
Avoiding Untrusted Media Devices . . . . . . . .134
B
Battery Exterior Lighting Battery Saver . . . . . . . . 124
Load Management . . . . . . . . . . . . . . . . . . . . . 123
Power Protection . . . . . . . . . . . . . . . . . . . . . . 124
Battery - North America . . . . . . . . . . . . 264, 301
Blade Replacement, Wiper . . . . . . . . . . . . . . . 265
Bluetooth Audio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137 Bluetooth (cont'd)
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . 154, 155
Brake Fluid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 263
System Warning Light . . . . . . . . . . . . . . . . . 102
Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 263 Antilock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 202
Brake Assist . . . . . . . . . . . . . . . . . . . . . . . . . . . 204
Electric Brake Boost . . . . . . . . . . . . . . . . . . . . 202
Electric Parking Brake . . . . . . . . . . . . . . . . . . 203
Braking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180 Automatic Emergency (AEB) . . . . . . . . . . . 225
Braking System Front Pedestrian (FPB) . . . . . . . . . . . . . . . . . 227
Break-In, New Vehicle . . . . . . . . . . . . . . . . . . . . . 191
Buckle To Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Bulb Replacement Headlamp Aiming . . . . . . . . . . . . . . . . . . . . . . 267
Buying New Tires . . . . . . . . . . . . . . . . . . . . . . . . 291C
Calibration Compass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
California Perchlorate Materials Requirements . . . 247
California Proposition 65 Warning . . . . . 1, 301
Camera
Rear Vision (RVC) . . . . . . . . . . . . . . . . . . . . . . 219 Canadian Vehicle Owners . . . . . . . . . . . . . . . . . . .2
Capacities and Specifications . . . . . . . . . . . . . 326
Carbon Monoxide
Engine Exhaust . . . . . . . . . . . . . . . . . . . . . . . . 198
Liftgate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Winter Driving . . . . . . . . . . . . . . . . . . . . . . . . . 187
Cargo
Management System . . . . . . . . . . . . . . . . . . . 82
Tie-Downs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
Caution, Danger, and Warning . . . . . . . . . . . . . .2
Center Console Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
Chains, Tire . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 294
Charging System Light . . . . . . . . . . . . . . . . . . . . . . . . . . 101
Wireless . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
Check Engine Light (Malfunction Indicator) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .101
Child Restraints Infants and Young Children . . . . . . . . . . . . . 63
Lower Anchors and Tethers forChildren . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
Older Children . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Securing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74, 75
Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Child Safety Locks . . . . . . . . . . . . . . . . . . . . . . . . .18
Circuit Breakers . . . . . . . . . . . . . . . . . . . . . . . . . . 269