2012 CHEVROLET SUBURBAN ECU

Black plate (89,1)Chevrolet Tahoe/Suburban Owner Manual - 2012
Vehicle Care 10-89
2. Turn the engine off and firmly setthe parking brake.
3. Securely attach the vehicle being towed to the tow vehicle.
{WARNING
Shifting a four-wheel-drive
vehicle's transfer case into
N (Neutral) can cause the vehicle
to roll even if the transmission is
in P (Park). The driver or others
could be injured. Make sure the
parking brake is firmly set before
the transfer case is shifted to
N (Neutral). 4. Shift the transfer case
to N (Neutral). See See
Four-Wheel Drive (Two Speed
Automatic Transfer Case) on
page 9‑36 orFour-Wheel Drive
(Single Speed Automatic
Transfer Case) on page 9‑41.
5. Release the parking brake only after the vehicle being towed is
firmly attached to the towing
vehicle.
6. Turn the ignition to LOCK/OFF and remove the key —the
steering wheel will still turn. After towing, see
“Shifting Out of
Neutral” underFour-Wheel Drive
(Two Speed Automatic Transfer
Case) on page 9‑36 orFour-Wheel
Drive (Single Speed Automatic
Transfer Case) on page 9‑41 for the
proper procedure to take the vehicle
out of the Neutral position.

Black plate (91,1)Chevrolet Tahoe/Suburban Owner Manual - 2012
Vehicle Care 10-91
{WARNING
Shifting a four-wheel-drive
vehicle's transfer case into
N (Neutral) can cause the vehicle
to roll even if the transmission is
in P (Park). The driver or others
could be injured. Make sure the
parking brake is firmly set before
the transfer case is shifted to
N (Neutral).
5. Use an adequate clamping device designed for towing to
ensure that the front wheels are
locked into the straight position.
6. Shift the transfer case to N (Neutral). See Four-Wheel
Drive (Two Speed Automatic
Transfer Case) on page 9‑36 or
Four-Wheel Drive (Single Speed
Automatic Transfer Case) on
page 9‑41. 7. Secure the vehicle to the dolly
following the manufacturer's
instructions.
8. Release the parking brake only after the vehicle being towed is
firmly attached to the towing
vehicle.
9. Turn the ignition to LOCK/OFF.
After towing, see “Shifting Out of
N (Neutral)” underFour-Wheel Drive
(Two Speed Automatic Transfer
Case) on page 9‑36 orFour-Wheel
Drive (Single Speed Automatic
Transfer Case) on page 9‑41.
Rear Towing (Rear Wheels Off
the Ground)
Two-Wheel-Drive Vehicles and
Four-Wheel Drive Vehicles with a
Single Speed Automatic
Transfer Case
Use the following procedure to dolly
tow the vehicle from the rear:
1. Attach the dolly to the tow
vehicle following the dolly
manufacturer's instructions.
2. Drive the rear wheels onto the dolly.

Black plate (92,1)Chevrolet Tahoe/Suburban Owner Manual - 2012
10-92 Vehicle Care
3. Firmly set the parking brake.See Parking Brake on
page 9‑44.
4. Put the transmission in P (Park).
5. Secure the vehicle to the dolly following the manufacturer's
instructions.
6. Use an adequate clamping device designed for towing to
ensure that the front wheels are
locked into the straight position.
7. For four-wheel drive vehicles with a single speed automatic
transfer case, shift the transfer
case into Two-Wheel Drive High.
See Four-Wheel Drive (Two
Speed Automatic Transfer Case)
on page 9‑36 orFour-Wheel
Drive (Single Speed Automatic
Transfer Case) on page 9‑41.
8. Turn the ignition to LOCK/OFF. Four-Wheel Drive Vehicles
with a Two Speed Automatic
Transfer Case
Use the following procedure to dolly
tow a four-wheel drive vehicle from
the rear:
1. Attach the dolly to the tow
vehicle following the dolly
manufacturer's instructions.
2. Drive the rear wheels onto the dolly.
3. Firmly set the parking brake. See Parking Brake on
page 9‑44.
4. Put the transmission in P (Park).
5. Secure the vehicle to the dolly following the manufacturer's
instructions.
6. Use an adequate clamping device designed for towing to
ensure that the front wheels are
locked into the straight position.{WARNING
Shifting a four-wheel-drive
vehicle's transfer case into
N (Neutral) can cause the vehicle
to roll even if the transmission is
in P (Park). The driver or others
could be injured. Make sure the
parking brake is firmly set before
the transfer case is shifted to
N (Neutral).
7. Shift the transfer case to N (Neutral). See Four-Wheel
Drive (Two Speed Automatic
Transfer Case) on page 9‑36 or
Four-Wheel Drive (Single Speed
Automatic Transfer Case) on
page 9‑41.
8. Turn the ignition to LOCK/OFF.
After towing, see “Shifting Out of
N (Neutral)” underFour-Wheel Drive
(Two Speed Automatic Transfer
Case) on page 9‑36 orFour-Wheel
Drive (Single Speed Automatic
Transfer Case) on page 9‑41.

Black plate (8,1)Chevrolet Tahoe/Suburban Owner Manual - 2012
13-8 Customer Information
Chevrolet and General Motors of
Canada Limited reserve the right to
limit services or payment to an
owner or driver if they decide the
claims are made too often, or the
same type of claim is made many
times.
Services Provided
.Emergency Fuel Delivery:
Delivery of enough fuel for the
vehicle to get to the nearest
service station.
.Lock‐Out Service:Service to
unlock the vehicle if you are
locked out. A remote unlock may
be available if you have OnStar.
For security reasons, the driver
must present identification
before this service is given.
.Emergency Tow From a Public
Road or Highway: Tow to the
nearest Chevrolet dealer for
warranty service, or if the vehicle
was in a crash and cannot be
driven. Assistance is also given
when the vehicle is stuck in the
sand, mud, or snow.
.Flat Tire Change: Service to
change a flat tire with the spare
tire. The spare tire, if equipped,
must be in good condition and
properly inflated. It is the owner's
responsibility for the repair or
replacement of the tire if it is not
covered by the warranty.
.Battery Jump Start: Service to
jump start a dead battery.
Services Not Included in
Roadside Assistance
.Impound towing caused by
violation of any laws.
.Legal fines.
.Mounting, dismounting,
or changing of snow tires,
chains, or other traction devices.
.Towing or services for vehicles
driven on a non-public road or
highway.
Services Specific to Canadian
Purchased Vehicles
.Fuel Delivery: Reimbursement
is approximately $5 Canadian.
Diesel fuel delivery may be
restricted. Propane and other
fuels are not provided through
this service.
.Lock-Out Service: Vehicle
registration is required.
.Trip Routing Service: Detailed
maps of North America are
provided when requested either
with the most direct route or the
most scenic route. There is a
limit of six requests per year.
Additional travel information is
also available. Allow three
weeks for delivery.
.Trip Interruption Benefits and
Assistance: Must be over
250 kilometers from where
your trip was started to
qualify. General Motors of
Canada Limited requires
pre-authorization, original
detailed receipts, and a copy of

Black plate (20,1)Chevrolet Tahoe/Suburban Owner Manual - 2012
13-20 Customer Information
GM will not access this data or
share it with others except: with the
consent of the vehicle owner or,
if the vehicle is leased, with the
consent of the lessee; in response
to an official request by police or
similar government office; as part of
GM's defense of litigation through
the discovery process; or, as
required by law. Data that GM
collects or receives may also be
used for GM research needs or may
be made available to others for
research purposes, where a need is
shown and the data is not tied to a
specific vehicle or vehicle owner.
OnStar®
If the vehicle is equipped with an
active OnStar system, that system
may also record data in crash or
near crash‐like situations. The
OnStar Terms and Conditions
provides information on data
collection and use and is available
at www.onstar.com (U.S.) or
www.onstar.ca (Canada), or by
pressing the
Qbutton andspeaking to an advisor. See
OnStar
Overview on page 14‑1 for more
information.
Navigation System
If the vehicle has a navigation
system, use of the system may
result in the storage of destinations,
addresses, telephone numbers, and
other trip information. Refer to the
navigation manual for information
on stored data and for deletion
instructions.
Radio Frequency
Identification (RFID)
RFID technology is used in some
vehicles for functions such as tire
pressure monitoring and ignition
system security, as well as in
connection with conveniences
such as key fobs for remote door
locking/unlocking and starting, and
in-vehicle transmitters for garage
door openers. RFID technology in
GM vehicles does not use or record personal information or link with
any other GM system containing
personal information.
Radio Frequency
Statement
This vehicle has systems that
operate on a radio frequency that
comply with Part 15 of the Federal
Communications Commission (FCC)
rules and with Industry Canada
Standards RSS‐GEN/210/220/310.
Operation is subject to the following
two conditions:
1. The device may not cause
harmful interference.
2. The device must accept any interference received, including
interference that may cause
undesired operation of the
device.
Changes or modifications to any of
these systems by other than an
authorized service facility could void
authorization to use this equipment.

Black plate (1,1)Chevrolet Tahoe/Suburban Owner Manual - 2012
OnStar 14-1
OnStar
OnStar Overview
OnStar Overview . . . . . . . . . . . . 14-1
OnStar Services
Emergency . . . . . . . . . . . . . . . . . . 14-2
Security . . . . . . . . . . . . . . . . . . . . . . 14-2
Navigation . . . . . . . . . . . . . . . . . . . 14-2
Connections . . . . . . . . . . . . . . . . . 14-4
Diagnostics . . . . . . . . . . . . . . . . . . 14-5
OnStar Additional Information
OnStar AdditionalInformation . . . . . . . . . . . . . . . . . 14-5
OnStar Overview
If equipped, this vehicle has a
comprehensive, in-vehicle system
that can connect to a live Advisor
for Emergency, Security, Navigation,
Connection, and Diagnostic
Services.
The OnStar system status light is
next to the OnStar buttons. If the
status light is:
.Solid Green: System is ready.
.Flashing Green: On a call.
.Red: Indicates a problem.
Push
Qor call 1‐888‐4‐ONSTAR
(1‐888‐466‐7827) to speak to an
Advisor. Push
Xto:
.Make a call, end a call,
or answer an incoming call.
.Give OnStar Hands-Free Calling
voice commands.
.Give OnStar Turn-by-Turn
Navigation voice commands.
Requires the available Directions
and Connections service plan.
Push
Qto connect to a live
Advisor to:
.Verify account information or
update contact information.
.Get driving directions. Requires
the available Directions and
Connections service plan.
.Receive On-Demand
Diagnostics for a check on the
vehicle’s key operating systems.
.Receive Roadside Assistance.

Black plate (2,1)Chevrolet Tahoe/Suburban Owner Manual - 2012
14-2 OnStar
Push]to get a priority connection
to an Emergency Advisor available
24/7 to:
.Get help for an emergency.
.Be a Good Samaritan or
respond to an AMBER Alert.
.Get crisis assistance and
evacuation routes.
OnStar Services
Emergency
With Automatic Crash Response,
the built-in system can automatically
connect to help in a crash even if
you cannot ask for it.
Push
]to connect to an
Emergency Advisor. GPS
technology is used to identify the
vehicle location and can provide
critical information to emergency
personnel. The Advisor is also
trained to offer critical assistance in
emergency situations.
Security
OnStar provides services like Stolen
Vehicle Assistance, Remote Ignition
Block, and Roadside Assistance,
if the vehicle is equipped with these
services. OnStar can unlock the
vehicle doors remotely, if it is
equipped with automatic door locks,
and can help police locate the
vehicle if it is stolen.
Navigation
OnStar navigation requires the
Directions and Connections
service plan.
Push
Qto receive directions or
have them sent to the vehicle
navigation screen. Destinations
can also be forwarded to the
vehicle from Google Maps™ or
MapQuest.com. The OnStar
mapping database is continuously
updated. Visit www.onstar.com for
coverage maps.
Turn‐by‐Turn Navigation
1. PushQto connect to a live
Advisor.
2. Request directions.
3. Directions are downloaded to the vehicle.
4. Follow the voice-guided commands.

Black plate (2,1)Chevrolet Tahoe/Suburban Owner Manual - 2012
i-2 INDEX
Auxiliary Devices . . . . . . . . . . . . . . 7-30
Axle, Front . . . . . . . . . . . . . . . . . . . . 10-27
Axle, Rear . . . . . . . . . . . . . . . . . . . . 10-28
B
Battery . . . . . . . . . . . . . . . . . . . . . . . 10-26Jump Starting . . . . . . . . . . . . . . . 10-82
Load Management . . . . . . . . . . . . . 6-9
Power Protection . . . . . . . . . . . . . . 6-9
Voltage and ChargingMessages . . . . . . . . . . . . . . . . . . . 5-35
Blade Replacement, Wiper . . . 10-31
Bluetooth . . . . . . . . . . . . . . . . . . . . . . 7-47
Brake Pedal and AdjustableThrottle . . . . . . . . . . . . . . . . . . . . . . 9-22
Brake System Warning Light . . . 5-21
Brakes . . . . . . . . . . . . . . . . . . . . . . . . 10-24 Antilock . . . . . . . . . . . . . . . . . . . . . . . 9-43
Assist . . . . . . . . . . . . . . . . . . . . . . . . . 9-44
Fluid . . . . . . . . . . . . . . . . . . . . . . . . 10-25
Parking . . . . . . . . . . . . . . . . . . . . . . . 9-44
System Messages . . . . . . . . . . . . 5-35 Braking . . . . . . . . . . . . . . . . . . . . . . . . . 9-4
Break-In, New Vehicle . . . . . . . . . 9-21
Bulb Replacement . . . . . . . . . . . . 10-36
Fog Lamps . . . . . . . . . . . . . . . . . . . . 6-6
Halogen Bulbs . . . . . . . . . . . . . . 10-34
Headlamp Aiming . . . . . . . . . . . 10-32
Headlamps . . . . . . . . . . . . . . . . . 10-34
License Plate Lamps . . . . . . . 10-35
Taillamps, Turn Signal,Stoplamps, and
Back-up Lamps . . . . . . . . . . . 10-34
Buying New Tires . . . . . . . . . . . . . 10-59
C
Calibration . . . . . . . . . . . . . . . . . . . . . . 5-6
California Fuel Requirements . . . . . . . . . . . 9-61
Perchlorate MaterialsRequirements . . . . . . . . . . . . . . . 10-3
Warning . . . . . . . . . . . . . . . . . . . . . . 10-3
Camera, Rear Vision . . . . . . . . . . 9-55
Canadian Vehicle Owners . . . . . . . . iii
Capacities and Specifications . . . . . . . . . . . . . . . . 12-2 Carbon Monoxide
Engine Exhaust . . . . . . . . . . . . . . . 9-29
Liftgate . . . . . . . . . . . . . . . . . . 2-9, 2-10
Winter Driving . . . . . . . . . . . . . . . . 9-13
Cargo Cover . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
Cautions, Danger, and
Warnings . . . . . . . . . . . . . . . . . . . . . . . . iv
CD Player . . . . . . . . . . . . . . . . . . . . . 7-14
CD/DVD Player . . . . . . . . . . . . . . . . 7-20
Center Console Storage . . . . . . . . 4-2
Center Seat . . . . . . . . . . . . . . . . . . . . 3-4
Chains, Tire . . . . . . . . . . . . . . . . . . 10-64
Charging System Light . . . . . . . . 5-18
Check Engine Light . . . . . . . . . . . . . . . . . . 5-18
Ignition
Transmission Lock . . . . . . . . 10-30
Child Restraints Infants and YoungChildren . . . . . . . . . . . . . . . . . . . . . 3-47
Lower Anchors and Tethers for Children . . . . . . . . . 3-53
Older Children . . . . . . . . . . . . . . . . 3-45
Securing . . . . . . . . . . 3-60, 3-63, 3-64
Systems . . . . . . . . . . . . . . . . . . . . . . 3-49