2021 CHEVROLET TAHOE oil change

Chevrolet Tahoe/Suburban Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-13690484) - 2021 - crc - 8/17/20
Service and Maintenance 387
Extended Idle Use
When the vehicle is used in a way that
requires extended idle time, one hour of use
shall be deemed the same as 53 km (33 mi).
SeeDriver Information Center (DIC) 0119 for
hourmeter.
Air Conditioning Desiccant (Replace Every
Seven Years)
The air conditioning system requires
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.
Tire Rotation and Required Services
Every 12 000 km/7,500 mi
Rotate the tires, if recommended for the
vehicle, and perform the following services.
See Tire Rotation 0352.
.Check engine oil level and oil
life percentage. If needed, change engine
oil and filter, and reset oil life system.
See Engine Oil 0315 and
Engine Oil Life System 0316.
.Check the air filter life percentage.
If necessary, replace the engine air filter
and reset the engine air filter life system.
See Engine Air Filter Life System 0318.
.Check engine coolant level. See Cooling
System 0319.
.Check windshield washer fluid level. See
Washer Fluid 0324.
.Check tire inflation pressures, including
the spare. See Tire Pressure0346.
.Inspect tire wear. See Tire Inspection
0 351.
.Visually check for fluid leaks.
.Inspect brake system. See Exterior Care
0 376.
.Visually inspect steering, suspension, and
chassis components for damage, including
cracks or tears in the rubber boots, loose
or missing parts, or signs of wear at least
once a year. See Exterior Care0376.
Lubricate the suspension and steering
components at least every other oil
change (if equipped with grease fittings).
.Inspect power steering for proper
attachment, connections, binding, leaks,
cracks, chafing, etc.
.Visually inspect halfshafts and drive
shafts for excessive wear, lubricant leaks,
and/or damage including: tube dents or
cracks, constant velocity joint or universal
joint looseness, cracked or missing boots,
loose or missing boot clamps, center
bearing excessive looseness, loose or
missing fasteners, and axle seal leaks.

Chevrolet Tahoe/Suburban Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-13690484) - 2021 - crc - 8/17/20
Service and Maintenance 389
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.
@ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @
Replace passenger compartment air filter. (1)@ @@@@@
Inspect evaporative control system. (2)@ @@
Change transfer case fluid, if equipped with 4WD. (3)@
Replace spark plugs. Inspect spark plug wires and/or boots.@
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 Tahoe/Suburban Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-13690484) - 2021 - crc - 8/17/20
Service and Maintenance 391
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.
@ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @
Replace passenger compartment air filter. (1)@ @@@@@
Inspect evaporative control system. (2)@ @@
Change automatic transmission fluid and filter.@@@
Change transfer case fluid, if equipped with 4WD. (3)@@@
Replace spark plugs. Inspect spark plug wires and/or boots.@
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)
Footnotes—Maintenance Schedule
Additional Required Services - Severe
(1) 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.
(2)
Visually check all fuel and vapor lines
and hoses for proper attachment,
connection, routing, and condition.
(3) Do not directly power wash the transfer
case and/or front/rear axle output seals.
High pressure water can overcome the seals

Chevrolet Tahoe/Suburban Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-13690484) - 2021 - crc - 8/17/20
392 Service and Maintenance
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 0319.
(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 0326.
(7) Or every 12 months, whichever comes
first. See Wiper Blade Replacement 0329.
(8) Or every 10 years, whichever comes first.
See Gas Strut(s) 0330.
(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 0376.
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.
.Trained dealer technicians have the
diagnostic equipment to test the battery
and ensure that the connections and
cables are corrosion-free.
Belts
.Belts may need replacing if they squeak
or show signs of cracking or splitting.
.Trained dealer technicians have access to
tools and equipment to inspect the belts
and recommend adjustment or
replacement when necessary.
Brakes
Brakes stop the vehicle and are crucial to
safe driving.
.Signs of brake wear may include chirping,
grinding, or squealing noises, or difficulty
stopping.
.Trained dealer technicians have access to
tools and equipment to inspect the brakes
and recommend quality parts engineered
for the vehicle.
Fluids
Proper fluid levels and approved fluids
protect the vehicle’s systems and
components. See Recommended Fluids and
Lubricants 0395 for GM approved fluids.

Chevrolet Tahoe/Suburban Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-13690484) - 2021 - crc - 8/17/20
418 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 Tahoe/Suburban Owner Manual (GMNA-Localizing-U.S./Canada/-
Mexico-13690484) - 2021 - crc - 8/17/20
424 Index
Front Pedestrian Braking (FPB)System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 270
Front Seats Heated and Ventilated . . . . . . . . . . . . . . . . . . 43
Fuel Additives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 278
Dynamic Management . . . . . . . . . . . . . . . . . 231
Economy, Driving for Better . . . . . . . . . . . 213
Filling a Portable Fuel Container . . . . . . . 279
Filling the Tank . . . . . . . . . . . . . . . . . . . . . . . . 278
Foreign Countries . . . . . . . . . . . . . . . . . . . . . . 278
Gauge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
Low Fuel Warning Light . . . . . . . . . . . . . . . . 117
Prohibited Fuels . . . . . . . . . . . . . . . . . . . . . . . 277
Recommended . . . . . . . . . . . . . . . . . . . . . . . . . 277
Top Tier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 276
Full-Size Spare Tire . . . . . . . . . . . . . . . . . . . . . . . 368
Fuses Engine Compartment Fuse Block . . . . . . . 333
Fuses and Circuit Breakers . . . . . . . . . . . . . 333
Instrument Panel Fuse Block . . . . . . . . . . . 337
Rear Compartment Fuse Block . . . . . . . . . 339
G
Garage Door Opener . . . . . . . . . . . . . . . . . . . . . 129Programming . . . . . . . . . . . . . . . . . . . . . . . . . . 129
Gas Strut(s) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 330 Gauges
Engine Coolant Temperature . . . . . . . . . . . 107
Engine Oil Pressure . . . . . . . . . . . . . . . . . . . . 106
Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
Odometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
Speedometer . . . . . . . . . . . . . . . . . . . . . . . . . . 105
Tachometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
Trip Odometer . . . . . . . . . . . . . . . . . . . . . . . . . 105
Voltmeter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
Warning Lights and Indicators . . . . . . . . . 101
General Information
Service and Maintenance . . . . . . . . . . . . . . 385
Towing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 280
Vehicle Care . . . . . . . . . . . . . . . . . . . . . . . . . . . 309
Glass Replacement . . . . . . . . . . . . . . . . . . . . . . . 330
Global Positioning System (GPS) . . . . . . . . . .174
Glove Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
GM Mobility Reimbursement Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 404
Guidance Problems with the Route . . . . . . . . . . . . . . . 175
H
Hazard Warning Flashers . . . . . . . . . . . . . . . . 136
HD Radio Technology . . . . . . . . . . . . . . . . . . . . 149
Head Restraints . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Head-up Display . . . . . . . . . . . . . . . . . . . . . . . . . . 121 Headlamps
Aiming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 331
Automatic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135
Bulb Replacement . . . . . . . . . . . . . . . . . . . . . . 331
Daytime Running Lamps (DRL) . . . . . . . . . 135
Flash-to-Pass . . . . . . . . . . . . . . . . . . . . . . . . . . . 135
High-Beam On Light . . . . . . . . . . . . . . . . . . . . 118
High/Low Beam Changer . . . . . . . . . . . . . . 135
Lamps On Reminder . . . . . . . . . . . . . . . . . . . . 118
Heated Rear Seats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Steering Wheel . . . . . . . . . . . . . . . . . . . . . . . . . 94
Heated and Ventilated Front Seats . . . . . . . 43
Heated Mirrors . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Heating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 204, 207
High-Beam On Light . . . . . . . . . . . . . . . . . . . . . . 118
High-Speed Operation . . . . . . . . . . . . . . . . . . . 347
Hill and Mountain Roads . . . . . . . . . . . . . . . . 220
Hill Descent Control (HDC) . . . . . . . . . . . . . . . 244
Hill Descent Control Light . . . . . . . . . . . . . . . . . 113
Hill Start Assist (HSA) . . . . . . . . . . . . . . . . . . . . 242
Hood . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 310
Horn . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
How to Wear Seat Belts Properly . . . . . . . . . .53
HVAC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 204, 207

Chevrolet Tahoe/Suburban Owner Manual (GMNA-Localizing-U.S./Canada/-
Mexico-13690484) - 2021 - crc - 8/17/20
Index 425
I
If the System Needs Service . . . . . . . . . . . . . . 175
Ignition Positions . . . . . . . . . . . . . . . . . . . . . . . . 226
Immobilizer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
IndicatorPedestrian Ahead . . . . . . . . . . . . . . . . . . . . . . . 114
Vehicle Ahead . . . . . . . . . . . . . . . . . . . . . . . . . . 113
Infants and Young Children, Restraints . . . . . 71
Information Publication Ordering . . . . . . . . . . . . . . . . . . . 408
Infotainment System . . . . . . . . . . . . . . . . . . . . . 411 Rear Seat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156
Instrument Cluster . . . . . . . . . . . . . . . . . . . . . . . 102
Instrument Panel Storage Area . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
Instrument Panel Overview . . . . . . . . . . . . . . . . 4
Interior Rearview Mirrors . . . . . . . . . . . . . . . . . 30
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . .1, 141
J
Jump Starting - North America . . . . . . . . . . . 369
K
Keyless Entry Remote (RKE) System . . . . . . . . . . . . . . . . . . . . 8
Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
L
Labeling, Tire Sidewall . . . . . . . . . . . . . . . . . . . 343 Lamps
Daytime Running (DRL) . . . . . . . . . . . . . . . . 135
Dome . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138
Exterior Controls . . . . . . . . . . . . . . . . . . . . . . . 133
Exterior Lamps Off Reminder . . . . . . . . . . 135
Exterior Lighting Battery Saver . . . . . . . . 140
Malfunction Indicator (Check
Engine) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110
On Reminder . . . . . . . . . . . . . . . . . . . . . . . . . . . 118
Reading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138
Lane Change Alert (LCA) . . . . . . . . . . . . . . . . . 272
Lane Keep Assist (LKA) . . . . . . . . . . . . . . . . . . . 275
Lane Keep Assist Light . . . . . . . . . . . . . . . . . . . . 113
Lap-Shoulder Belt . . . . . . . . . . . . . . . . . . . . . . . . . .55
LATCH System Replacing Parts after a Crash . . . . . . . . . . . 82
LATCH, Lower Anchors and Tethers for Children . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
LED Lighting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 331
Liftgate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
Lighting Entry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139
Exit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139
Illumination Control . . . . . . . . . . . . . . . . . . . . 137
LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 331
Lights Airbag Readiness . . . . . . . . . . . . . . . . . . . . . . 108 Lights (cont'd)
Antilock Brake System (ABS)
Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112
Brake System Warning . . . . . . . . . . . . . . . . . 111
Charging System . . . . . . . . . . . . . . . . . . . . . . 110
Check Engine (Malfunction Indicator) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110
Cruise Control . . . . . . . . . . . . . . . . . . . . . . . . . . 118
Door Ajar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118
Driver Mode Control . . . . . . . . . . . . . . . . . . . . 115
Electric Parking Brake . . . . . . . . . . . . . . . . . . . 112
Electronic Stability Control (ESC), Off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115
Engine Coolant Temperature Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115
Engine Oil Pressure . . . . . . . . . . . . . . . . . . . . . 117
Flash-to-Pass . . . . . . . . . . . . . . . . . . . . . . . . . . . 135
Four Corner Air Suspension . . . . . . . . . . . . . 116
Four-Wheel-Drive . . . . . . . . . . . . . . . . . . . . . . . 113
High-Beam On . . . . . . . . . . . . . . . . . . . . . . . . . . 118
High/Low Beam Changer . . . . . . . . . . . . . . 135
Hill Descent Control . . . . . . . . . . . . . . . . . . . . 113
Lane Keep Assist . . . . . . . . . . . . . . . . . . . . . . . . 113
Low Fuel Warning . . . . . . . . . . . . . . . . . . . . . . 117
Seat Belt Reminders . . . . . . . . . . . . . . . . . . . 108
Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117
Service Electric Parking Brake . . . . . . . . . . . 112
Tire Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116