check oil CHEVROLET TAHOE 2021 Owner's Manual

Chevrolet Tahoe/Suburban Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-13690484) - 2021 - crc - 8/17/20
Instruments and Controls 93
Instruments and Controls
Controls
Steering Wheel Adjustment . . . . . . . . . . . . 94
Steering Wheel Controls . . . . . . . . . . . . . . . 94
Heated Steering Wheel . . . . . . . . . . . . . . . . . 94
Horn . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
Windshield Wiper/Washer . . . . . . . . . . . . . . 95
Rear Window Wiper/Washer . . . . . . . . . . . 96
Compass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
Power Outlets . . . . . . . . . . . . . . . . . . . . . . . . . . 98
Wireless Charging . . . . . . . . . . . . . . . . . . . . . . 99
Warning Lights, Gauges, and Indicators
Warning Lights, Gauges, andIndicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101
Instrument Cluster . . . . . . . . . . . . . . . . . . . . . 102
Speedometer . . . . . . . . . . . . . . . . . . . . . . . . . . 105
Odometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
Trip Odometer . . . . . . . . . . . . . . . . . . . . . . . . . 105
Tachometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
Fuel Gauge . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
Engine Oil Pressure Gauge . . . . . . . . . . . . 106
Engine Coolant Temperature Gauge . . . 107
Voltmeter Gauge . . . . . . . . . . . . . . . . . . . . . . 107
Seat Belt Reminders . . . . . . . . . . . . . . . . . . . 108
Airbag Readiness Light . . . . . . . . . . . . . . . . 108
Passenger Airbag Status Indicator . . . . . 109
Charging System Light . . . . . . . . . . . . . . . . . 110 Malfunction Indicator Lamp (Check
Engine Light) . . . . . . . . . . . . . . . . . . . . . . . . . 110
Brake System Warning Light . . . . . . . . . . . 111
Electric Parking Brake Light . . . . . . . . . . . . 112
Service Electric Parking Brake Light . . . . . 112
Antilock Brake System (ABS) Warning Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112
Four-Wheel-Drive Light . . . . . . . . . . . . . . . . . 113
Hill Descent Control Light . . . . . . . . . . . . . . 113
Lane Keep Assist (LKA) Light . . . . . . . . . . . 113
Vehicle Ahead Indicator . . . . . . . . . . . . . . . . 113
Pedestrian Ahead Indicator . . . . . . . . . . . . . 114
Traction Off Light . . . . . . . . . . . . . . . . . . . . . . 114
Traction Control System (TCS)/Electronic Stability Control Light . . . . . . . . . . . . . . . . 114
Electronic Stability Control (ESC) Off Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115
Engine Coolant Temperature Warning Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115
Driver Mode Control Light . . . . . . . . . . . . . 115
Four Corner Air Suspension Light . . . . . . 116
Tire Pressure Light . . . . . . . . . . . . . . . . . . . . . 116
Engine Oil Pressure Light (Uplevel Cluster) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117
Low Fuel Warning Light . . . . . . . . . . . . . . . . 117
Security Light . . . . . . . . . . . . . . . . . . . . . . . . . . 117
High-Beam On Light . . . . . . . . . . . . . . . . . . . 118
Lamps On Reminder . . . . . . . . . . . . . . . . . . . 118
Cruise Control Light . . . . . . . . . . . . . . . . . . . . 118
Door Ajar Light . . . . . . . . . . . . . . . . . . . . . . . . 118
Information Displays
Driver Information Center (DIC) . . . . . . . . 119
Head-Up Display (HUD) . . . . . . . . . . . . . . . . 121
Vehicle Messages
Vehicle Messages . . . . . . . . . . . . . . . . . . . . . . 124
Engine Power Messages . . . . . . . . . . . . . . . 124
Vehicle Speed Messages . . . . . . . . . . . . . . . 124
Vehicle Personalization
Vehicle Personalization . . . . . . . . . . . . . . . . 124
Universal Remote System
Universal Remote System . . . . . . . . . . . . . 129
Universal Remote System Programming . . . . . . . . . . . . . . . . . . . . . . . . 129
Universal Remote System Operation . . . 131

Chevrolet Tahoe/Suburban Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-13690484) - 2021 - crc - 8/17/20
Instruments and Controls 97
INT :Turns on the rear wiper with a delay
between wipes.
ON : Turns on the rear wiper.
L:Push the windshield wiper lever
forward to spray washer fluid on the rear
window. The wipers will clear the rear
window and either stop or return to your
preset speed. For more washer cycles, push
and hold the lever.
The rear window wiper/washer will not
operate if the liftgate is open or ajar. If the
liftgate is opened while the rear wiper is on,
the wiper returns to the parked position and
stops.
See “Rear Camera Washer” later in this
section.
Rear Wiper Arm Assembly Protection
When using an automatic car wash, move
the rear wiper control to OFF to disable the
rear wiper. In some vehicles, if the
transmission is in N (Neutral) and the
vehicle speed is very slow, the rear wiper
will automatically park under the rear
spoiler.
The wiper operations return to normal when
the transmission is no longer in N (Neutral)
or the vehicle speed has increased. Auto Wipe in Reverse Gear
If the rear wiper control is off, the rear
wiper will automatically operate
continuously when the transmission is in
R (Reverse), and the front windshield wiper
is performing low or high speed wipes.
If the rear wiper control is off, the
transmission is in R (Reverse), and the front
windshield wiper is performing INT wipes,
then the rear wiper automatically performs
INT wipes.
This feature can be turned on or off. See
Vehicle Personalization
0124.
The windshield washer reservoir is used for
the windshield, rear window, and rear mirror
camera, if equipped. See Rear Camera Mirror
0 30. Check the fluid level in the reservoir if
either washer is not working. See Washer
Fluid 0324.
Rear Camera Washer
If equipped, push the windshield wiper lever
forward to spray washer fluid on the rear
camera lens. The lever returns to its starting
position when released. See Rear Camera
Mirror 030.
Compass
The vehicle may have a compass display on
the Driver Information Center (DIC). The
compass receives its heading and other
information from the Global Positioning
System (GPS) antenna, Electronic Stability
Control (ESC), and vehicle speed information.
The compass system is designed to operate
for a certain number of miles or degrees of
turn before needing a signal from the GPS
satellites. When the compass display shows
CAL, drive the vehicle for a short distance in
an open area where it can receive a GPS

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Instruments and Controls 107
indicates oil pressure outside the normal
operating range, check the vehicle's oil as
soon as possible.
SeeEngine Oil 0315.
Caution
Lack of proper engine oil maintenance
can damage the engine. Driving with the
engine oil low can also damage the
engine. The repairs would not be covered
by the vehicle warranty. Check the oil
level as soon as possible. Add oil if
required, but if the oil level is within the
operating range and the oil pressure is
still low, have the vehicle serviced.
Always follow the maintenance schedule
for changing engine oil.
If the vehicle has a diesel engine, see the
Duramax diesel supplement.
Engine Coolant Temperature
Gauge
Uplevel Metric Shown, Base Level Similar
Uplevel English Shown, Base Level Similar This gauge measures the temperature of the
vehicle's engine coolant.
While driving under normal operating
conditions, if the needle moves into the red
warning area, the engine is too hot. Pull off
the road, stop the vehicle, and turn off the
engine as soon as possible.
Voltmeter Gauge
Uplevel Shown, Base Level Similar
When the ignition is on, this gauge indicates
the battery voltage.
When the engine is running, this gauge
shows the condition of the charging system.
The gauge can transition from a higher to
lower or a lower to higher reading. This is

Chevrolet Tahoe/Suburban Owner Manual (GMNA-Localizing-U.S./Canada/
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Instruments and Controls 117
A Driver Information Center (DIC) tire
pressure message may also display. Stop as
soon as possible, and inflate the tires to the
pressure value shown on the Tire and
Loading Information label. SeeTire Pressure
0 346.
When the Light Flashes First and Then Is On
Steady
If the light flashes for about a minute and
then stays on, there may be a problem with
the TPMS. If the problem is not corrected,
the light will come on at every ignition
cycle. See Tire Pressure Monitor Operation
0 349.
Engine Oil Pressure Light (Uplevel
Cluster)
Caution
Lack of proper engine oil maintenance
can damage the engine. Driving with the
engine oil low can also damage the
engine. The repairs would not be covered
by the vehicle warranty. Check the oil
level as soon as possible. Add oil if
required, but if the oil level is within the
operating range and the oil pressure is
(Continued)
Caution (Continued)
still low, have the vehicle serviced.
Always follow the maintenance schedule
for changing engine oil.
This light should come on briefly as the
engine is started. If it does not come on,
have the vehicle serviced by your dealer.
If the light comes on and stays on, it means
that oil is not flowing through the engine
properly. The vehicle could be low on oil
and might have some other system
problem. See your dealer.
Low Fuel Warning Light
A Low Fuel Warning Light near the fuel
gauge comes on briefly when the ignition is
turned on as a check to show it is working.
For vehicles with a reconfigurable cluster,
this light is in the display area and may not
come on when the ignition is turned on.
It also comes on when the fuel gauge
indicator nears empty. The light turns off
when fuel is added. If it does not, have the
vehicle serviced.
Security Light
The security light should come on briefly as
the engine is started. If it does not come on,
have the vehicle serviced by your dealer.
If the system is working normally, the
indicator light turns off.
If the light stays on and the engine does
not start, there could be a problem with the
theft-deterrent system. See Immobilizer
Operation 027.

Chevrolet Tahoe/Suburban Owner Manual (GMNA-Localizing-U.S./Canada/
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284 Driving and Operating
Caution
If the vehicle tires begin to spin and the
vehicle begins to slide toward the water,
remove your foot from the accelerator
pedal and apply the brake pedal. Seek
help to have the vehicle towed up
the ramp.
Maintenance when Trailer Towing
The vehicle needs service more often when
used to tow trailers. SeeMaintenance
Schedule 0386. It is especially important to
check the automatic transmission fluid,
engine oil, axle lubricant, belts, cooling
system, and brake system before and during
each trip.
Check periodically that all nuts and bolts on
the trailer hitch are tight.
Engine Cooling when Trailer Towing
The cooling system may temporarily
overheat during severe operating conditions.
See Engine Overheating 0322.
Trailer Towing
If equipped with a diesel engine, see the
Duramax diesel supplement.
Caution
Towing a trailer improperly can damage
the vehicle and result in costly repairs
not covered by the vehicle warranty. To
tow a trailer correctly, follow the
directions in this section and see your
dealer for important information about
towing a trailer with the vehicle.
Trailering is different than just driving the
vehicle by itself. Trailering means changes in
handling, acceleration, braking, durability,
and fuel economy. Successful, safe trailering
takes correct equipment, and it has to be
used properly.
The following information has many
time-tested, important trailering tips and
safety rules. Many of these are important
for your safety and that of your passengers.
Read this section carefully before pulling a
trailer.
Trailer Weight
{Warning
Never exceed the towing capacity for
your vehicle. Safe trailering requires monitoring the
weight, speed, altitude, road grades, outside
temperature, and how frequently the vehicle
is used to tow a trailer.
Trailer Weight Ratings
When towing a trailer, the combined weight
of the vehicle, vehicle contents, trailer, and
trailer contents must be below all of the
maximum weight ratings for the vehicle,
including:
.GCWR: Gross Combined Weight Rating
.GVWR: Gross Vehicle Weight Rating
.Maximum Trailer Weight Rating
.GAWR-RR: Gross Axle Weight Rating-Rear
.Maximum Trailer Tongue Weight Rating
See “Weight-Distributing Hitch and
Adjustment” underTowing Equipment 0287
to determine if equalizer bars are required
to obtain the maximum trailer weight
rating.
See “Trailer Brakes” underTowing
Equipment 0287 to determine if brakes are
required based on your trailer's weight.

Chevrolet Tahoe/Suburban Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-13690484) - 2021 - crc - 8/17/20
308 Vehicle Care
Vehicle Care
General Information
General Information . . . . . . . . . . . . . . . . . . 309
California Proposition 65 Warning . . . . . 309
California Perchlorate MaterialsRequirements . . . . . . . . . . . . . . . . . . . . . . . 309
Accessories and Modifications . . . . . . . . . 309
Vehicle Checks
Doing Your Own Service Work . . . . . . . . . 310
Hood . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 310
Engine Compartment Overview . . . . . . . . 312
Engine Oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 315
Engine Oil Life System . . . . . . . . . . . . . . . . . 316
Automatic Transmission Fluid . . . . . . . . . . 317
Engine Air Filter Life System . . . . . . . . . . . 318
Engine Air Cleaner/Filter . . . . . . . . . . . . . . . 318
Cooling System . . . . . . . . . . . . . . . . . . . . . . . . 319
Engine Overheating . . . . . . . . . . . . . . . . . . . . 322
Engine Fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . 324
Washer Fluid . . . . . . . . . . . . . . . . . . . . . . . . . . 324
Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 324
Brake Pad Life System . . . . . . . . . . . . . . . . . 325
Brake Fluid . . . . . . . . . . . . . . . . . . . . . . . . . . . . 326
Battery - North America . . . . . . . . . . . . . . . 327
Four-Wheel Drive . . . . . . . . . . . . . . . . . . . . . . 327
Front Axle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 328
Rear Axle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 328 Park Brake and P (Park) Mechanism
Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 328
Wiper Blade Replacement . . . . . . . . . . . . . 329
Glass Replacement . . . . . . . . . . . . . . . . . . . . 330
Windshield Replacement . . . . . . . . . . . . . . 330
Gas Strut(s) . . . . . . . . . . . . . . . . . . . . . . . . . . . 330
Headlamp Aiming
Front Headlamp Aiming . . . . . . . . . . . . . . . 331
Bulb Replacement
Bulb Replacement . . . . . . . . . . . . . . . . . . . . . . 331
LED Lighting . . . . . . . . . . . . . . . . . . . . . . . . . . . 331
Taillamps, Turn Signal, Stoplamps, and Back-Up Lamps . . . . . . . . . . . . . . . . . . . . . . . 331
Electrical System
Electrical System Overload . . . . . . . . . . . . . 332
Fuses and Circuit Breakers . . . . . . . . . . . . . 333
Engine Compartment Fuse Block . . . . . . . 333
Instrument Panel Fuse Block . . . . . . . . . . . 337
Rear Compartment Fuse Block . . . . . . . . . 339
Wheels and Tires
Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 341
All-Season Tires . . . . . . . . . . . . . . . . . . . . . . . . 342
Winter Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . 342
Low-Profile Tires . . . . . . . . . . . . . . . . . . . . . . . 342
All-Terrain Tires . . . . . . . . . . . . . . . . . . . . . . . . 342
Tire Sidewall Labeling . . . . . . . . . . . . . . . . . 343
Tire Designations . . . . . . . . . . . . . . . . . . . . . . 344
Tire Terminology and Definitions . . . . . . 344 Tire Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . 346
Tire Pressure for High-Speed
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 347
Tire Pressure Monitor System . . . . . . . . . 348
Tire Pressure Monitor Operation . . . . . . 349
Tire Inspection . . . . . . . . . . . . . . . . . . . . . . . . . 351
Tire Rotation . . . . . . . . . . . . . . . . . . . . . . . . . . 352
When It Is Time for New Tires . . . . . . . . 353
Buying New Tires . . . . . . . . . . . . . . . . . . . . . . 353
Different Size Tires and Wheels . . . . . . . 354
Uniform Tire Quality Grading . . . . . . . . . . 355
Wheel Alignment and Tire Balance . . . . 356
Wheel Replacement . . . . . . . . . . . . . . . . . . . 356
Tire Chains . . . . . . . . . . . . . . . . . . . . . . . . . . . . 357
If a Tire Goes Flat . . . . . . . . . . . . . . . . . . . . . 357
Tire Changing . . . . . . . . . . . . . . . . . . . . . . . . . 358
Full-Size Spare Tire . . . . . . . . . . . . . . . . . . . . 368
Jump Starting
Jump Starting - North America . . . . . . . . 369
Towing the Vehicle
Towing the Vehicle . . . . . . . . . . . . . . . . . . . . 372
Recreational Vehicle Towing . . . . . . . . . . . 373
Appearance Care
Exterior Care . . . . . . . . . . . . . . . . . . . . . . . . . . 376
Interior Care . . . . . . . . . . . . . . . . . . . . . . . . . . 380
Floor Mats . . . . . . . . . . . . . . . . . . . . . . . . . . . . 383

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Vehicle Care 313
1. Remote Negative (–) Location. SeeJump
Starting - North America 0369.
2. Positive (+) Terminal (Under Cover). See Jump Starting - North America 0369.
3. Battery - North America 0327.
4. Engine Compartment Fuse Block 0333.
5. Engine Oil Dipstick. See “Checking Engine
Oil” under Engine Oil 0315.
6. Engine Cooling Fans (Out of View). See Cooling System 0319. 7. Engine Oil Fill Cap. See
“When to Add
Engine Oil” underEngine Oil 0315.
8. Coolant Surge Tank and Pressure Cap. See Cooling System 0319.
9. Engine Air Cleaner/Filter 0318.
10. Brake Fluid Reservoir. See Brake Fluid
0 326.
11. Windshield Washer Fluid Reservoir. See “Adding Washer Fluid” underWasher
Fluid 0324.

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314 Vehicle Care
6.2L V8 Engine
1. Remote Negative (–) Location. See Jump
Starting - North America 0369.
2. Positive (+) Terminal (Under Cover). See Jump Starting - North America 0369.
3. Battery - North America 0327.
4. Engine Compartment Fuse Block 0333. 5. Engine Oil Dipstick. See
“Checking Engine
Oil” under Engine Oil 0315.
6. Engine Cooling Fans (Out of View). See Cooling System 0319.
7. Engine Oil Fill Cap. See “When to Add
Engine Oil” underEngine Oil 0315. 8. Coolant Surge Tank and Pressure Cap.
See Cooling System 0319.
9. Engine Air Cleaner/Filter 0318.
10. Brake Fluid Reservoir. See Brake Fluid
0 326.

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Vehicle Care 315
11. Windshield Washer Fluid Reservoir. See“Adding Washer Fluid” underWasher
Fluid 0324.
Engine Oil
For diesel engine vehicles, see “Engine Oil”
in the Duramax diesel supplement.
To ensure proper engine performance and
long life, careful attention must be paid to
engine oil. Following these simple, but
important steps will help protect your
investment:
.Use engine oil approved to the proper
specification and of the proper viscosity
grade. See “Selecting the Right Engine
Oil” in this section.
.Check the engine oil level regularly and
maintain the proper oil level. See
“Checking Engine Oil” and“When to Add
Engine Oil” in this section.
.Change the engine oil at the appropriate
time. SeeEngine Oil Life System 0316.
.Always dispose of engine oil properly. See
“What to Do with Used Oil” in this
section.
Checking Engine Oil
Check the engine oil level regularly, every
650 km (400 mi), especially prior to a long
trip. The engine oil dipstick handle is a loop.
See Engine Compartment Overview 0312 for
the location.
{Warning
The engine oil dipstick handle may be
hot; it could burn you. Use a towel or
glove to touch the dipstick handle.
If a low oil Driver Information Center (DIC)
message displays, check the oil level.
Follow these guidelines:
.To get an accurate reading, park the
vehicle on level ground. Check the engine
oil level after the engine has been off for
at least two hours. Checking the engine
oil level on steep grades or too soon after
engine shutoff can result in incorrect
readings. Accuracy improves when
checking a cold engine prior to starting.
Remove the dipstick and check the level.
.If unable to wait two hours, the engine
must be off for at least 15 minutes if the
engine is warm, or at least 30 minutes if
the engine is not warm. Pull out the dipstick, wipe it with a clean paper towel
or cloth, then push it back in all the way.
Remove it again, keeping the tip down,
and check the level.
When to Add Engine Oil
If the oil is below the cross-hatched area at
the tip of the dipstick and the engine has
been off for at least 15 minutes, add 1 L (1
qt) of the recommended oil and then
recheck the level. See
“Selecting the Right
Engine Oil” later in this section for an
explanation of what kind of oil to use. For
engine oil crankcase capacity, see Capacities
and Specifications 0398.
Caution
Do not add too much oil. Oil levels above
or below the acceptable operating range
shown on the dipstick are harmful to the
engine. If the oil level is above the
operating range (i.e., the engine has so
(Continued)

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Vehicle Care 317
factors which include engine revolutions,
engine temperature, and miles driven. Based
on driving conditions, the mileage at which
an oil change is indicated can vary
considerably. For the oil life system to work
properly, the system must be reset every
time the oil is changed.
On some vehicles, when the system has
calculated that oil life has been diminished,
a CHANGE ENGINE OIL SOON message comes
on to indicate that an oil change is
necessary. Change the oil as soon as
possible within the next 1 000 km (600 mi).
It is possible that, if driving under the best
conditions, the oil life system might indicate
that an oil change is not necessary for up to
a year. The engine oil and filter must be
changed at least once a year and, at this
time, the system must be reset. For vehicles
without the CHANGE ENGINE OIL SOON
message, an oil change is needed when the
REMAINING OIL LIFE percentage is near 0%.
Your dealer has trained service people who
will perform this work and reset the system.
It is also important to check the oil regularly
over the course of an oil drain interval and
keep it at the proper level.If the system is ever reset accidentally, the
oil must be changed at 5 000 km (3,000 mi)
since the last oil change. Remember to reset
the oil life system whenever the oil is
changed.
How to Reset the Engine Oil Life System
Reset the system whenever the engine oil is
changed so that the system can calculate
the next engine oil change. Always reset the
engine oil life to 100% after every oil
change. It will not reset itself. To reset the
engine oil life system:
1. Display the oil life percentage on the DIC. See Driver Information Center (DIC)
0 119.
2. Press the thumbwheel on the steering wheel, or the trip odometer reset stem if
the vehicle does not have DIC controls,
for several seconds. When the
confirmation message displays, select
YES. The oil life will change to 100%.
The oil life system can also be reset as
follows: 1. Display the oil life percentage on the DIC. See Driver Information Center (DIC)
0 119.
2. Fully press the accelerator pedal slowly three times within five seconds. 3. If the display changes to 100%, the
system is reset.
If the vehicle has a CHANGE ENGINE OIL
SOON message and it comes back on when
the vehicle is started and/or the oil
life percentage is near 0%, the engine oil
life system has not been reset. Repeat the
procedure.
Automatic Transmission Fluid
When to Check and Change Automatic
Transmission Fluid
It is usually not necessary to check the
transmission fluid level. The only reason for
fluid loss is a transmission leak or
overheated transmission. This vehicle is not
equipped with a transmission fluid level
dipstick. There is a special procedure for
checking and changing the transmission fluid
in these vehicles. Because this procedure is
difficult, this should be done at the dealer.
Contact the dealer for additional information
or the procedure can be found in the service
manual. See Publication Ordering
Information 0408.