2021 CHEVROLET BLAZER oil change

Chevrolet Blazer Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
14608203) - 2021 - CRC - 10/29/20
334 Service and Maintenance
Maintenance Schedule Additional
Required Services - Normal12 000 km/7,500 mi
24 000 km/15,000 mi
36 000 km/22,500 mi
48 000 km/30,000 mi 60 000 km/37,500 mi
72 000 km/45,000 mi84 000 km/52,500 mi
96 000 km/60,000 mi
108 000 km/67,500 mi 120 000 km/75,000 mi 132 000 km/82,500 mi
144 000 km/90,000 mi 156 000 km/97,500 mi
168 000 km/105,000 mi 180 000 km/112,500 mi
192 000 km/120,000 mi 204 000 km/127,500 mi 216 000 km/135,000 mi
228 000 km/142,500 mi
240 000 km/150,000 mi
Rotate tires and perform Required Services. Check engine oil
level and oil life percentage. Change engine oil and filter,
if needed.
Check engine air filter life percentage and status. Change
engine air filter, if needed. (1)
@ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @
Replace passenger compartment air filter. (2)@ @@@@@
Replace spark plugs. (2.0L engine only.) Inspect spark plug
wires and/or boots.@ @
Replace spark plugs. (except 2.0L engine.) Inspect spark plug
wires and/or boots.@
Change rear axle fluid, if equipped with AWD. (3)@
Drain and fill engine cooling system. (4)@
Visually inspect accessory drive belts. (5)@
Replace brake fluid. (6)
Replace front and rear wiper blades. (7)
@ @ @ @ @ @ @ @ @ @
Replace hood and/or body lift support gas struts. (8)@ @
Replace air conditioning desiccant. (9)

Chevrolet Blazer Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
14608203) - 2021 - CRC - 10/29/20
Service and Maintenance 335
Footnotes—Maintenance Schedule
Additional Required Services - Normal
(1) Or every four years, whichever comes
first. If driving in dusty conditions, inspect
the filter at each oil change or more often
as needed. See Engine Air Cleaner/Filter
0 265.
(2) Or every two years, whichever comes
first. More frequent passenger compartment
air filter replacement may be needed if
driving in areas with heavy traffic, poor air
quality, high dust levels, or environmental
allergens. Passenger compartment air filter
replacement may also be needed if there is
reduced airflow, window fogging, or odors.
Your GM dealer can help determine when to
replace the filter. (3)
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.
(4) Or every five years, whichever comes
first. See Cooling System 0267.
(5) Or every 10 years, whichever comes first.
Inspect for fraying, excessive cracking,
or damage; replace, if needed. (6)
Replace brake fluid every five years. See
Brake Fluid 0273.
(7) Or every 12 months, whichever comes
first. See Wiper Blade Replacement 0276.
(8) Or every 10 years, whichever comes first.
See Gas Strut(s) 0277.
(9) Replace air conditioning desiccant every
seven years.

Chevrolet Blazer Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
14608203) - 2021 - CRC - 10/29/20
336 Service and Maintenance
Maintenance Schedule Additional
Required Services - Severe12 000 km/7,500 mi
24 000 km/15,000 mi
36 000 km/22,500 mi
48 000 km/30,000 mi 60 000 km/37,500 mi
72 000 km/45,000 mi84 000 km/52,500 mi
96 000 km/60,000 mi
108 000 km/67,500 mi 120 000 km/75,000 mi 132 000 km/82,500 mi
144 000 km/90,000 mi 156 000 km/97,500 mi
168 000 km/105,000 mi 180 000 km/112,500 mi
192 000 km/120,000 mi 204 000 km/127,500 mi 216 000 km/135,000 mi
228 000 km/142,500 mi
240 000 km/150,000 mi
Rotate tires and perform Required Services. Check engine oil
level and oil life percentage. Change engine oil and filter,
if needed.
Check engine air filter life percentage and status. Change
engine air filter, if needed. (1)
@ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @
Replace passenger compartment air filter. (2)@ @@@@@
Change automatic transmission fluid.@ @@
Replace spark plugs. (2.0L engine only.) Inspect spark plug
wires and/or boots.@ @
Replace spark plugs. (except 2.0L engine.) Inspect spark plug
wires and/or boots.@
Change rear axle fluid, if equipped with AWD. (3)@ @
Drain and fill engine cooling system. (4)@
Visually inspect accessory drive belts. (5)@
Replace brake fluid. (6)
Replace front and rear wiper blades. (7)
@ @ @ @ @ @ @ @ @ @
Replace hood and/or body lift support gas struts. (8)@@
Replace air conditioning desiccant. (9)

Chevrolet Blazer Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
14608203) - 2021 - CRC - 10/29/20
Service and Maintenance 337
Footnotes—Maintenance Schedule
Additional Required Services - Severe
(1) Or every four years, whichever comes
first. If driving in dusty conditions, inspect
the filter at each oil change or more often
as needed. See Engine Air Cleaner/Filter
0 265.
(2) Or every two years, whichever comes
first. More frequent passenger compartment
air filter replacement may be needed if
driving in areas with heavy traffic, poor air
quality, high dust levels, or environmental
allergens. Passenger compartment air filter
replacement may also be needed if there is
reduced airflow, window fogging, or odors.
Your GM dealer can help determine when to
replace the filter.
(3) 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.
(4) Or every five years, whichever comes
first. See Cooling System 0267. (5)
Or every 10 years, whichever comes first.
Inspect for fraying, excessive cracking,
or damage; replace, if needed.
(6) Replace brake fluid every five years. See
Brake Fluid 0273.
(7) Or every 12 months, whichever comes
first. See Wiper Blade Replacement 0276.
(8) Or every 10 years, whichever comes first.
See Gas Strut(s) 0277.
(9) Replace air conditioning desiccant every
seven years.
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 0323.
Additional Maintenance
and Care
Your vehicle is an important investment and
caring for it properly may help to avoid
future costly repairs. To maintain vehicle
performance, additional maintenance
services may be required.
It is recommended that your dealer perform
these services —their trained dealer
technicians know your vehicle best. Your
dealer can also perform a thorough
assessment with a multi-point inspection to
recommend when your vehicle may need
attention.
The following list is intended to explain the
services and conditions to look for that may
indicate services are required.
Battery
The 12-volt battery supplies power to start
the engine and operate any additional
electrical accessories.
.To avoid break-down or failure to start
the vehicle, maintain a battery with full
cranking power.

Chevrolet Blazer Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
14608203) - 2021 - CRC - 10/29/20
366 Connected Services
PressQ, then ask the Advisor to download
directions to the vehicle’s navigation system,
if equipped. After the call ends, the
navigation screen will provide prompts to
begin driving directions. Routes that are sent
to the navigation screen can only be
canceled through the navigation system.
See www.onstar.com (U.S.) or www.onstar.ca
(Canada).
Connections
The following services help with staying
connected.
For coverage maps, see www.onstar.com
(U.S.) or www.onstar.ca (Canada).
Ensuring Security
.Change the default passwords for the
Wi-Fi hotspot and myChevrolet mobile
application. Make these passwords
different from each other and use a
combination of letters and numbers to
increase the security.
.Change the default name of the SSID
(Service Set Identifier). This is your
network’s name that is visible to other
wireless devices. Choose a unique name
and avoid family names or vehicle
descriptions. Wi-Fi Hotspot (If Equipped)
The vehicle may have a built-in Wi-Fi
hotspot that provides access to the Internet
and web content at 4G LTE speed. Up to
seven mobile devices can be connected.
A data plan is required. Use the in-vehicle
controls only when it is safe to do so.
1. To retrieve Wi-Fi hotspot information, press
=to open the OnStar app on the
infotainment display, then select Wi-Fi
Hotspot. On some vehicles, touch Wi-Fi
or Wi-Fi Settings on the screen.
2. The Wi-Fi settings will display the Wi-Fi hotspot name (SSID), password, and on
some vehicles, the connection type (no
Internet connection, 3G, 4G, 4G LTE), and
signal quality (poor, good, excellent). The
LTE icon shows connection to Wi-Fi. It is
possible that the icon may not illuminate
even though the vehicle has an active
connection.
3. To change the SSID or password, press
Qor call 1-888-4ONSTAR to connect
with an Advisor. On some vehicles, the
SSID and password can be changed in
the Wi-Fi Hotspot menu. After initial set-up, your vehicle’s Wi-Fi
hotspot will connect automatically to your
mobile devices. Manage data usage by
turning Wi-Fi on or off on your mobile
device, using the myChevrolet mobile app,
or by contacting an OnStar Advisor. On
some vehicles, Wi-Fi can also be managed
from the Wi-Fi Hotspot menu.
MyChevrolet Mobile App (If Available)
Download the myChevrolet mobile app to
compatible Apple and Android smartphones.
Chevrolet users can access the following
services from a smartphone:
.Remotely start/stop the vehicle,
if factory-equipped.
.Lock/unlock doors, if equipped with
automatic locks.
.Activate the horn and lamps.
.Check the vehicle’s fuel level, oil life,
or tire pressure, if factory-equipped with
the Tire Pressure Monitor System.
.Send destinations to the vehicle.
.Locate the vehicle on a map (U.S.
market only).
.Turn the vehicle's Wi-Fi hotspot on/off,
manage settings, and monitor data
consumption, if equipped.
.Locate a dealer and schedule service.

Chevrolet Blazer Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
14608203) - 2021 - CRC - 10/29/20
372 Index
Fuses (cont'd)Instrument Panel Fuse Block . . . . . . . . . . . 284
Rear Compartment Fuse Block . . . . . . . . . 285
G
Garage Door Opener . . . . . . . . . . . . . . . . . . . . . . 117
Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . 117
Gas Strut(s) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 277
Gauges
Engine Coolant Temperature . . . . . . . . . . . . 96
Engine Oil Temperature . . . . . . . . . . . . . . . . . 96
Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
Odometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
Speedometer . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
Tachometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
Trip Odometer . . . . . . . . . . . . . . . . . . . . . . . . . . 95
Voltmeter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
Warning Lights and Indicators . . . . . . . . . . 89
General Information Service and Maintenance . . . . . . . . . . . . . . 331
Towing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 242
Vehicle Care . . . . . . . . . . . . . . . . . . . . . . . . . . . 254
Global Positioning System (GPS) . . . . . . . . . . 152
Glove Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
GM Mobility Reimbursement Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 352
Guidance Problems with the Route . . . . . . . . . . . . . . 153
H
Hazard Warning Flashers . . . . . . . . . . . . . . . . .124
HD Radio Technology . . . . . . . . . . . . . . . . . . . . . 135
Head Restraints . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
HeadlampsAiming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 278
Automatic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123
Bulb Replacement . . . . . . . . . . . . . . . . . . . . . . 278
Daytime Running Lamps (DRL) . . . . . . . . . 123
Flash-to-Pass . . . . . . . . . . . . . . . . . . . . . . . . . . . 123
High Intensity Discharge (HID)Lighting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 278
High-Beam On Light . . . . . . . . . . . . . . . . . . . 106
High/Low Beam Changer . . . . . . . . . . . . . . 122
Lamps On Reminder . . . . . . . . . . . . . . . . . . . 107
Heated Rear Seats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Steering Wheel . . . . . . . . . . . . . . . . . . . . . . . . . 83
Heated and Ventilated Front Seats . . . . . . . 40
Heated Mirrors . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Heater
Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 203
Heating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .182
High Voltage Devices and Wiring . . . . . . . . 279
High-Beam On Light . . . . . . . . . . . . . . . . . . . . . 106
High-Speed Operation . . . . . . . . . . . . . . . . . . . 295
Hill and Mountain Roads . . . . . . . . . . . . . . . . 195
Hill Start Assist (HSA) . . . . . . . . . . . . . . . . . . . . . 212 Hood . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 255
Hooks
Shopping Bag . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
Horn . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
How to Wear Seat Belts Properly . . . . . . . . . 45
HVAC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .182
I
If the System Needs Service . . . . . . . . . . . . . . 153
Ignition Positions . . . . . . . . . . . . . . . . . . . . . . . . 200
Immobilizer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Indicator Pedestrian Ahead . . . . . . . . . . . . . . . . . . . . . . 104
Vehicle Ahead . . . . . . . . . . . . . . . . . . . . . . . . . 103
Infants and Young Children, Restraints . . . . .61
Information Publication Ordering . . . . . . . . . . . . . . . . . . . 356
Infotainment System . . . . . . . . . . . . . . . . . . . . 359
Instrument Cluster . . . . . . . . . . . . . . . . . . . . 90, 93
Instrument Panel Overview . . . . . . . . . . . . . . . . 4
Interior Rearview Mirrors . . . . . . . . . . . . . . . . . 26
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . 1, 128
J
Jump Starting - North America . . . . . . . . . . . .318
K
Keyless Entry Remote (RKE) System . . . . . . . . . . . . . . . . . . . . 7

Chevrolet Blazer Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
14608203) - 2021 - CRC - 10/29/20
Index 373
Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
L
Labeling, Tire Sidewall . . . . . . . . . . . . . . . . . . . 289
LampsCourtesy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125
Daytime Running (DRL) . . . . . . . . . . . . . . . . 123
Dome . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125
Exterior Controls . . . . . . . . . . . . . . . . . . . . . . . . 121
Exterior Lamps Off Reminder . . . . . . . . . . 122
Exterior Lighting Battery Saver . . . . . . . . . 127
Malfunction Indicator (CheckEngine) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
On Reminder . . . . . . . . . . . . . . . . . . . . . . . . . . 107
Reading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125
Lane Change Alert (LCA) . . . . . . . . . . . . . . . . . 236
Lane Keep Assist (LKA) . . . . . . . . . . . . . . . . . . . 237
Lane Keep Assist Light . . . . . . . . . . . . . . . . . . . 103
Lap-Shoulder Belt . . . . . . . . . . . . . . . . . . . . . . . . . 46
LATCH System Replacing Parts after a Crash . . . . . . . . . . . . 71
LATCH, Lower Anchors and Tethers for Children . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
LED Lighting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 278
Liftgate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
Lighting Entry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126
Exit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126 Lighting (cont'd)
Illumination Control . . . . . . . . . . . . . . . . . . . 124
LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 278
Lights Airbag Readiness . . . . . . . . . . . . . . . . . . . . . . . 98
Antilock Brake System (ABS)Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
Brake System Warning . . . . . . . . . . . . . . . . 101
Charging System . . . . . . . . . . . . . . . . . . . . . . 100
Check Engine (Malfunction Indicator) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
Cruise Control . . . . . . . . . . . . . . . . . . . . . . . . . 107
Door Ajar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
Electric Parking Brake . . . . . . . . . . . . . . . . . . 102
Engine Coolant Temperature Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
Engine Oil Pressure . . . . . . . . . . . . . . . . . . . . 105
Flash-to-Pass . . . . . . . . . . . . . . . . . . . . . . . . . . . 123
High-Beam On . . . . . . . . . . . . . . . . . . . . . . . . . 106
High/Low Beam Changer . . . . . . . . . . . . . . 122
Lane Keep Assist . . . . . . . . . . . . . . . . . . . . . . . 103
Low Fuel Warning . . . . . . . . . . . . . . . . . . . . . 106
Seat Belt Reminders . . . . . . . . . . . . . . . . . . . . 98
Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
Service Electric Parking Brake . . . . . . . . . . 102
StabiliTrak OFF . . . . . . . . . . . . . . . . . . . . . . . . . 104
Tire Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
Tow/Haul Mode . . . . . . . . . . . . . . . . . . . . . . . 103 Lights (cont'd)
Traction Control System
(TCS)/StabiliTrak . . . . . . . . . . . . . . . . . . . . . 104
Traction Off . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104
Locks Automatic Door . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Delayed Locking . . . . . . . . . . . . . . . . . . . . . . . . 16
Door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Lockout Protection . . . . . . . . . . . . . . . . . . . . . . . 17
Power Door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Loss of Control . . . . . . . . . . . . . . . . . . . . . . . . . . . 191
Low Fuel Warning Light . . . . . . . . . . . . . . . . . 106
Lower Anchors and Tethers for
Children (LATCH System) . . . . . . . . . . . . . . . . 66
Lumbar Adjustment . . . . . . . . . . . . . . . . . . . . . . . 36
Front Seats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
M
MaintenanceRecords . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 343
Maintenance and Care
Additional . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 337
Maintenance Schedule . . . . . . . . . . . . . . . . . . . 332 Recommended Fluids andLubricants . . . . . . . . . . . . . . . . . . . . . . . . . . . . 340
Malfunction Indicator Lamp . . . . . . . . . . . . . . 100
Manual Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . 209