2018 CHEVROLET SUBURBAN Power step

Chevrolet Tahoe/Suburban Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-11349385) - 2018 - crc - 11/3/17
Lighting 189
exterior and interior lamps remain
on for a set amount of time, then
automatically turn off.
If equipped with Keyless Access,
the exterior lamps automatically turn
on when the driver’s door is opened
after the ignition is turned off. The
interior lights turn on when the
ignition is turned off.
The exterior lamps turn off
immediately by turning the exterior
lamp control off.
This feature can be changed. See
Vehicle Personalization 0170.
Battery Load
Management
The vehicle has Electric Power
Management (EPM), which
estimates the battery's temperature
and state of charge. It then adjusts
the voltage for best performance
and extended life of the battery.
When the battery's state of charge
is low, the voltage is raised slightly
to quickly bring the charge back up.
When the state of charge is high, the voltage is lowered slightly to
prevent overcharging. The voltmeter
gauge or the voltage display on the
Driver Information Center (DIC),
if equipped, may show the voltage
moving up or down. This is normal.
If there is a problem, an alert will be
displayed.
The battery can be discharged at
idle if the electrical loads are very
high. This is true for all vehicles.
This is because the generator
(alternator) may not be spinning fast
enough at idle to produce all the
power that is needed for very high
electrical loads.
A high electrical load occurs when
several of the following are on, such
as: headlamps, high beams, fog
lamps, rear window defogger,
climate control fan at high speed,
heated seats, engine cooling fans,
trailer loads, and loads plugged into
accessory power outlets.
EPM works to prevent excessive
discharge of the battery. It does this
by balancing the generator's output
and the vehicle's electrical needs.
It can increase engine idle speed togenerate more power, whenever
needed. It can temporarily reduce
the power demands of some
accessories.
Normally, these actions occur in
steps or levels, without being
noticeable. In rare cases at the
highest levels of corrective action,
this action may be noticeable to the
driver. If so, a DIC message might
be displayed and it is recommended
that the driver reduce the electrical
loads as much as possible.
Battery Power Protection
This feature shuts off the dome and
reading lamps if they are left on for
more than 10 minutes when the
ignition is off. This will keep the
battery from running down.
Exterior Lighting Battery
Saver
The exterior lamps turn off about
10 minutes after the ignition is
turned off, if the parking lamps or
headlamps have been manually left
on. This protects against draining

Chevrolet Tahoe/Suburban Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-11349385) - 2018 - crc - 11/3/17
202 Driving and Operating
{Warning
Taking your eyes off the road too
long or too often could cause a
crash resulting in injury or death.
Focus your attention on driving.
Refer to the infotainment section for
more information on using that
system and the navigation system,
if equipped, including pairing and
using a cell phone.
Defensive Driving
Defensive driving means “always
expect the unexpected.” The first
step in driving defensively is to wear
the seat belt. See Seat Belts083.
. Assume that other road users
(pedestrians, bicyclists, and
other drivers) are going to be
careless and make mistakes.
Anticipate what they might do
and be ready.
. Allow enough following distance
between you and the driver in
front of you. .
Focus on the task of driving.
Drunk Driving
Death and injury associated with
drinking and driving is a global
tragedy.
{Warning
Drinking and then driving is very
dangerous. Your reflexes,
perceptions, attentiveness, and
judgment can be affected by even
a small amount of alcohol. You
can have a serious —or even
fatal —collision if you drive after
drinking.
Do not drink and drive or ride with
a driver who has been drinking.
Ride home in a cab; or if you are
with a group, designate a driver
who will not drink.
Control of a Vehicle
Braking, steering, and accelerating
are important factors in helping to
control a vehicle while driving.
Braking
Braking action involves perception
time and reaction time. Deciding to
push the brake pedal is perception
time. Actually doing it is
reaction time.
Average driver reaction time is
about three-quarters of a second. In
that time, a vehicle moving at
100 km/h (60 mph) travels 20 m
(66 ft), which could be a lot of
distance in an emergency.
Helpful braking tips to keep in mind
include:
. Keep enough distance between
you and the vehicle in front
of you.
. Avoid needless heavy braking.
. Keep pace with traffic.
If the engine ever stops while the
vehicle is being driven, brake
normally but do not pump the
brakes. Doing so could make the
pedal harder to push down. If the
engine stops, there will be some
power brake assist but it will be
used when the brake is applied.

Chevrolet Tahoe/Suburban Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-11349385) - 2018 - crc - 11/3/17
224 Driving and Operating
away from moving engine
parts. If you do not, it could be
damaged.
The length of time the heater should
remain plugged in depends on
several factors. Ask a dealer in the
area where you will be parking the
vehicle for the best advice on this.
Retained Accessory
Power (RAP)
Some vehicle accessories may be
used after the ignition is turned off.
The power windows and sunroof,
if equipped, will continue to work for
up to 10 minutes or until any door is
opened.
The infotainment system will
continue to work for 10 minutes,
until the driver door is opened,
or until the ignition is turned on or
placed in ACC/ACCESSORY.
Shifting Into Park
{Warning
It can be dangerous to get out of
the vehicle if the shift lever is not
fully in P (Park) with the parking
brake firmly set. The vehicle can
roll. If you have left the engine
running, the vehicle can move
suddenly. You or others could be
injured. To be sure the vehicle will
not move, even when you are on
fairly level ground, use the steps
that follow. If the vehicle has a
four-wheel-drive transfer case
with a N (Neutral) position, and
the transfer case is in N (Neutral),
the vehicle will be free to roll,
even if the shift lever is in
P (Park). Be sure the transfer
case is in a drive gear. If towing a
trailer, see Driving Characteristics
and Towing Tips 0271.
1. Hold the brake pedal down, then set the parking brake. See
Parking Brake 0240. 2. Move the shift lever into the
P (Park) position by pulling the
shift lever toward you and
moving it up as far as it will go.
3. Be sure the transfer case is in a drive gear –not in
N (Neutral).
4. Turn the ignition off.
Leaving the Vehicle with the
Engine Running
{Warning
It can be dangerous to leave the
vehicle with the engine running.
The vehicle could move suddenly
if the shift lever is not fully in
P (Park) with the parking brake
firmly set.
If you have four-wheel drive and
the transfer case is in N (Neutral),
the vehicle will be free to roll,
even if the shift lever is in
P (Park). So be sure the transfer
case is in a drive gear –not in
N (Neutral).
(Continued)

Chevrolet Tahoe/Suburban Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-11349385) - 2018 - crc - 11/3/17
Vehicle Care 309
By this time, the coolant level
inside the coolant surge tank
may be lower. If the level is
lower, add more of the proper
mixture to the coolant surge
tank until the level reaches the
full cold mark.
5. Replace the pressure cap tightly.
6. Verify coolant level after the engine is shut off and the
coolant is cold. If necessary,
repeat coolant fill procedure
Steps 1–6.
Caution
If the pressure cap is not tightly
installed, coolant loss and engine
damage may occur. Be sure the
cap is properly and tightly
secured.
Engine Overheating
For a heavy-duty Suburban, see the
Suburban Heavy-Duty Package
supplement.
Caution
Running the engine without
coolant may cause damage or a
fire. Vehicle damage would not be
covered by the vehicle warranty.
The vehicle has several indicators
to warn of engine overheating.
There is a coolant temperature
gauge in the vehicle's instrument
cluster. See Engine Coolant
Temperature Gauge 0149.
In addition, there are ENGINE
OVERHEATED STOP ENGINE,
ENGINE OVERHEATED IDLE
ENGINE, and ENGINE POWER IS
REDUCED messages in the Driver
Information Center (DIC).
If the decision is made not to lift the
hood when this warning appears,
get service help right away.
If the decision is made to lift the
hood, make sure the vehicle is
parked on a level surface. Check to see if the engine cooling
fan(s) are running. If the engine is
overheating, the fans should be
running. If they are not, do not
continue to run the engine. Have the
vehicle serviced.
Caution
Do not run the engine if there is a
leak in the engine cooling system.
This can cause a loss of all
coolant and can damage the
system and vehicle. Have any
leaks fixed right away.
If Steam is Coming from the
Engine Compartment
{Warning
Steam and scalding liquids from a
hot cooling system are under
pressure. Turning the pressure
cap, even a little, can cause them
to come out at high speed and
you could be burned. Never turn
(Continued)

Chevrolet Tahoe/Suburban Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-11349385) - 2018 - crc - 11/3/17
382 Vehicle Care
Visually check constant velocity joint
boots and axle seals for leaks.
For 1500 Series vehicles, at least
every other oil change lubricate the
outer tie rod ends.
Control arm ball joints on 1500
Series vehicles are
maintenance-free.
Caution
Lubrication of applicable steering/
suspension points should not be
done unless the temperature is
−12 °C (10 °F) or higher,
or damage could result.
For a heavy-duty Suburban, see the
Suburban Heavy-Duty Package
supplement.
Body Component Lubrication
Lubricate all key lock cylinders,
hood hinges, liftgate hinges, steel
fuel door hinge and power assist
step hinges, unless the components
are plastic. Applying silicone grease on weatherstrips with a clean cloth
will make them last longer, seal
better, and not stick or squeak.
Underbody Maintenance
At least twice a year, spring and fall,
use plain water to flush any
corrosive materials from the
underbody. Take care to thoroughly
clean any areas where mud and
other debris can collect. If equipped
with power assist steps, extend
them and then use a high pressure
wash to clean all joints and gaps.
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 fluid. Contaminated
fluid will decrease the life of the
transfer case and/or axles and
should be replaced.
Sheet Metal Damage
If the vehicle is damaged and
requires sheet metal repair or
replacement, make sure the body
repair shop applies anti-corrosion
material to parts repaired or
replaced to restore corrosion
protection.
Original manufacturer replacement
parts will provide the corrosion
protection while maintaining the
vehicle warranty.
Finish Damage
Quickly repair minor chips and
scratches with touch-up materials
available from your dealer to avoid
corrosion. Larger areas of finish
damage can be corrected in your
dealer's body and paint shop.
Chemical Paint Spotting
Airborne pollutants can fall upon
and attack painted vehicle surfaces
causing blotchy, ring-shaped
discolorations, and small, irregular
dark spots etched into the paint
surface. See
“Finish Care”
previously in this section.
Interior Care
To prevent dirt particle abrasions,
regularly clean the vehicle's interior.
Immediately remove any soils.

Chevrolet Tahoe/Suburban Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-11349385) - 2018 - crc - 11/3/17
398 Service and Maintenance
UsageFluid/Lubricant
Key Lock Cylinders, Hood Hinges, Power Assist Steps, and Outer
Liftgate Handle Pivot Points Multi-Purpose Lubricant, Superlube (GM Part No. 12346241, in
Canada 10953474).
Rear Axle SAE 75W-85 Synthetic Axle Lubricant (GM Part No. 19300457, in
Canada 19300458).
Transfer Case (Four-Wheel Drive) DEXRON-VI Automatic Transmission Fluid. Weatherstrip Conditioning Weatherstrip Lubricant (GM Part No. 3634770, in Canada 10953518) or Dielectric Silicone Grease (GM Part No. 12345579, in Canada 10953481).
Weatherstrip Squeaks Synthetic Grease with Teflon, Superlube (GM Part No. 12371287, in Canada 10953437).
Windshield Washer Automotive windshield washer fluid that meets regional freeze protection requirements.
Maintenance Replacement Parts
Replacement parts identified below by name, part number, or specification can be obtained from your dealer.
Part GM Part Number ACDelco Part Number
Engine Air Cleaner/Filter 22845992 A3181C
Oil Filter 19330000 PF63E
Passenger Compartment Air Filter 23281440 CF188

Chevrolet Tahoe/Suburban Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-11349385) - 2018 - crc - 11/3/17
Index 437
Mirrors, Interior Rearview . . . . . . . . 59
Monitor System, TirePressure . . . . . . . . . . . . . . . . . . . . . . 345
N
NavigationOnStar . . . . . . . . . . . . . . . . . . . . . . . 420
Net, Convenience . . . . . . . . . . . . . . 129
New Vehicle Break-In . . . . . . . . . . . 216
O
Odometer . . . . . . . . . . . . . . . . . . . . . . . 147 Trip . . . . . . . . . . . . . . . . . . . . . . . . . . . 147
Off-Road . . . . . . . . . . . . . . . . . . . . . . . 204 Driving . . . . . . . . . . . . . . . . . . . . . . . . 204
Recovery . . . . . . . . . . . . . . . . . . . . . 203
Oil
Engine . . . . . . . . . . . . . . . . . . . . . . . . 297
Engine Oil Life System . . . . . . . 299
Engine Oil Pressure Gauge . . . 148
Older Children, Restraints . . . . . . 105
Online Owner Center . . . . . . . . . . . 407
OnStar . . . . . . . . . . . . . . . . . . . . . . . . . 417
OnStar Additional Information . . . . . . . . . . . . . . . . . . . . 424
OnStar Connections . . . . . . . . . . . . 421
OnStar Diagnostics . . . . . . . . . . . . . 423
OnStar Emergency . . . . . . . . . . . . . 419
OnStar Navigation . . . . . . . . . . . . . . 420 OnStar Overview . . . . . . . . . . . . . . . 418
OnStar Security . . . . . . . . . . . . . . . . 420
Operation
Fog Lamps . . . . . . . . . . . . . . . . . . . 186
Ordering Service Publications . . . . . . . . . . 413
Outlets
Power . . . . . . . . . . . . . . . . . . . . . . . . 138
Overheating, Engine . . . . . . . . . . . . 309P
Park Shifting Into . . . . . . . . . . . . . . . . . . . 224
Shifting Out of . . . . . . . . . . . . . . . . 225
Parking Brake . . . . . . . . . . . . . . . . . . . . . . . . . 240
Brake and P (Park)Mechanism Check . . . . . . . . . . 317
Extended . . . . . . . . . . . . . . . . . . . . . 226
Over Things That Burn . . . . . . . 226
Parking Assist . . . . . . . . . . . . . . . . . . 256
Parking or Backing
Assistance Systems . . . . . . . . . . 256
Passenger Airbag Status Indicator . . . . . . . . . . . . . . . . . . . . . . 152
Passenger Compartment Air
Filter . . . . . . . . . . . . . . . . . . . . . . . . . . 198
Passenger Sensing System . . . . . 99 Perchlorate Materials
Requirements, California . . . . . . 291
Personalization Vehicle . . . . . . . . . . . . . . . . . . . . . . . 170
Power Door Locks . . . . . . . . . . . . . . . . . . . . . 45
Mirrors . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Outlets . . . . . . . . . . . . . . . . . . . . . . . 138
Protection, Battery . . . . . . . . . . . . 189
Retained Accessory (RAP) . . . 224
Seat Adjustment . . . . . . . . . . . . . . . . 67
Steering Fluid . . . . . . . . . . . . . . . . . .311
Windows . . . . . . . . . . . . . . . . . . . . . . . 60
Power Assist Steps . . . . . . . . . . . . . . 52
Pregnancy, Using Seat Belts . . . . 89
Privacy Vehicle Data Recording . . . . . . . 416
Program Courtesy Transportation . . . . . . 410
Proposition 65 Warning,
California . . . . . . . . . . . .291, 314, 368,
Back Cover
R
Radio Frequency Statement . . . . 414
Reading Lamps . . . . . . . . . . . . . . . . . 188

Chevrolet Tahoe/Suburban Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-11349385) - 2018 - crc - 11/3/17
Index 439
Seats (cont'd)Reclining Seatbacks . . . . . . . . . . . . 68
Second Row . . . . . . . . . . . . . . . . . . . . 75
Third Row Seat . . . . . . . . . . . . . . . . . 79
Second Row Seats . . . . . . . . . . . . . . 75
Securing Child Restraints . . . . . . . . . . . . . . . . 121, 123
Security Light . . . . . . . . . . . . . . . . . . . . . . . . . . 159
OnStar . . . . . . . . . . . . . . . . . . . . . . . 420
Vehicle . . . . . . . . . . . . . . . . . . . . . . . . . 53
Vehicle Alarm . . . . . . . . . . . . . . . . . . . 53
Service . . . . . . . . . . . . . . . . . . . . . . . . . 199 Accessories and
Modifications . . . . . . . . . . . . . . . . 291
Doing Your Own Work . . . . . . . . 292
Maintenance Records . . . . . . . . 400
Maintenance, General Information . . . . . . . . . . . . . . . . . . 387
Parts Identification Label . . . . . 401
Publications Ordering Information . . . . . . . . . . . . . . . . . . 413
Scheduling Appointments . . . . . 410
Services Special Application . . . . . . . . . . . 394
Servicing the Airbag . . . . . . . . . . . . 103 Shift Lock Control Function
Check, Automatic
Transmission . . . . . . . . . . . . . . . . . . 317
Shifting Into Park . . . . . . . . . . . . . . . . . . . . . . 224
Out of Park . . . . . . . . . . . . . . . . . . . 225
Side Blind Zone Alert (SBZA) . . . 262
Signals, Turn and
Lane-Change . . . . . . . . . . . . . . . . . 185
Special Application Services . . . . 394
Specifications and Capacities . . . . . . . . . . . . . . . . . . . . . 402
Speedometer . . . . . . . . . . . . . . . . . . . 147
StabiliTrak OFF Light . . . . . . . . . . . . . . . . . . . . . 158
Start Assist, Hill . . . . . . . . . . . . . . . . . 241
Start Vehicle, Remote . . . . . . . . . . . 43
Starter Switch Check . . . . . . . . . . . 316
Starting the Engine . . . . . . . . . . . . . 221
Steering . . . . . . . . . . . . . . . . . . . . . . . . 203 Fluid, Power . . . . . . . . . . . . . . . . . . .311
Heated Wheel . . . . . . . . . . . . . . . . 133
Wheel Adjustment . . . . . . . . . . . . 132
Wheel Controls . . . . . . . . . . . . . . . 133
Steps
Power Assist . . . . . . . . . . . . . . . . . . . 52
Stoplamps and Back-up Lamps Bulb Replacement . . . . . . . . . . . . 322 Storage
Rear . . . . . . . . . . . . . . . . . . . . . . . . . . 128
Storage Areas Armrest . . . . . . . . . . . . . . . . . . . . . . . 128
Center Console . . . . . . . . . . . . . . . 128
Convenience Net . . . . . . . . . . . . . 129
Glove Box . . . . . . . . . . . . . . . . . . . . 127
Instrument Panel . . . . . . . . . . . . . 127
Roof Rack System . . . . . . . . . . . . 129
Sunglasses . . . . . . . . . . . . . . . . . . . 128
Storage Compartments . . . . . . . . . 127
Struts
Gas . . . . . . . . . . . . . . . . . . . . . . . . . . . 319
Stuck Vehicle . . . . . . . . . . . . . . . . . . . 211
Sun Visors . . . . . . . . . . . . . . . . . . . . . . . 62
Sunglass Storage . . . . . . . . . . . . . . . 128
Sunroof . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . 3
System Forward CollisionAlert (FCA) . . . . . . . . . . . . . . . . . . 258
Infotainment . . . . . . . . . . . . . 191, 417
Roof Rack . . . . . . . . . . . . . . . . . . . . 129
Systems Driver Assistance . . . . . . . . . . . . . 255
T
Tachometer . . . . . . . . . . . . . . . . . . . . . 147