2011 CHEVROLET SILVERADO ECU

Black plate (13,1)Chevrolet Silverado Owner Manual - 2011
Keys, Doors and Windows 2-13
If a locked driver door is opened
without using the RKE transmitter,
a 10 second pre-alarm will occur.
The horn will chirp and the lights
will flash. If the key is not placed
in the ignition and turned to START
or the door is not unlocked by
pressing the unlock button on
the RKE transmitter during the
10 second pre-alarm, the alarm
will go off. The vehicle's headlamps
will flash and the horn will sound
for about 30 seconds, then will turn
off to save the battery power.
The theft-deterrent system will not
activate if the doors are locked with
the key or the manual door lock.
It activates only if you use the
power door lock switch or the RKE
transmitter. The vehicle can be
started with the correct key if the
alarm is set off.To avoid setting off the alarm by
accident:
.If you do not want to activate
the theft-deterrent system, the
vehicle should be locked with
the door key after the doors are
closed.
.Always unlock a door with the
RKE transmitter.
If the alarm is set off, press unlock
on the RKE transmitter or place the
key in the ignition and turn it to
START.
Testing the Alarm
To test the alarm:
1. Lower the driver window and open the driver door.
2. Press lock on the RKE transmitter. 3. Close the door and wait for the
security light to go out.
4. Reach in through the window, unlock the door with the manual
door lock, and open the door.
This should set off the alarm.
If the alarm does not sound when
it should but the headlamps flash,
check to see if the horn works. The
horn fuse may be blown. To replace
the fuse, see Fuses and Circuit
Breakers on page 10‑48.
If the alarm does not sound or the
headlamps do not flash, see your
dealer for service.

Black plate (14,1)Chevrolet Silverado Owner Manual - 2011
2-14 Keys, Doors and Windows
Immobilizer
SeeRadio Frequency Statementon
page 13‑18for information
regarding Part 15 of the Federal
Communications Commission (FCC)
rules and Industry Canada
Standards RSS-210/220/310.
Immobilizer Operation
This vehicle has PASS-Key®III+
(Personalized Automotive Security
System) theft-deterrent system.
PASS-Key
®III+ is a passive
theft-deterrent system.
The system is automatically armed
when the key is removed from the
ignition.
The system is automatically
disarmed when the key is turned
to ON/RUN, ACC/ACCESSORY
or START from the LOCK/OFF
position. You do not have to manually arm or
disarm the system.
The security light will come on if
there is a problem with arming
or disarming the theft-deterrent
system.
When the PASS-Key
®III+ system
senses that someone is using the
wrong key, it prevents the vehicle
from starting. Anyone using a
trial-and-error method to start the
vehicle will be discouraged because
of the high number of electrical key
codes.
If the engine does not start and
the security light on the instrument
panel cluster comes on when trying
to start the vehicle, there may be
a problem with the theft-deterrent
system. Turn the ignition off and
try again. If the engine still does not start,
and the key appears to be
undamaged, try another ignition key.
At this time, you may also want to
check the fuse. See
Fuses and
Circuit Breakers
on page 10‑48.
If the engine still does not start
with the other key, the vehicle
needs service. If the vehicle does
start, the first key may be faulty.
See your dealer who can service
the PASS-Key
®III+ to have a new
key made. In an emergency, contact
Roadside Assistance.
It is possible for the PASS-Key
®III+
decoder to learn the transponder
value of a new or replacement key.

Black plate (15,1)Chevrolet Silverado Owner Manual - 2011
Keys, Doors and Windows 2-15
Up to 10 keys may be programmed
for the vehicle. The following
procedure is for programming
additional keys only. If all the
currently programmed keys are
lost or do not operate, you must
see your dealer or a locksmith who
can service PASS-Key
®III+ to have
keys made and programmed to the
system.
See your dealer or a locksmith who
can service PASS-Key
®III+ to get
a new key blank cut exactly as
the ignition key that operates the
system.
To program the new additional key:
1. Verify that the new key has
a
1stamped on it.
2. Insert the original, already programmed key in the ignition
and start the engine. If the
engine will not start, see your
dealer for service. 3. After the engine has started,
turn the key to LOCK/OFF,
and remove the key.
4. Insert the new key to be programmed and turn it to
the ON/RUN position within
five seconds of turning the
ignition to the LOCK/OFF
position in Step 3.
The security light will turn
off once the key has been
programmed.
5. Repeat Steps 1 through 4 if additional keys are to be
programmed.
If you lose or damage your
PASS-Key
®III+ key, see your
dealer or a locksmith who can
service PASS-Key
®III+ to have
a new key made.
Do not leave the key or device that
disarms or deactivates the theft
deterrent system in the vehicle.
Exterior Mirrors
Convex Mirrors
{WARNING
A convex mirror can make things,
like other vehicles, look farther
away than they really are. If you
cut too sharply into the right lane,
you could hit a vehicle on the
right. Check the inside mirror or
glance over your shoulder before
changing lanes.
The passenger side mirror is convex
shaped. A convex mirror's surface is
curved so more can be seen from
the driver seat.

Black plate (1,1)Chevrolet Silverado Owner Manual - 2011
Seats and Restraints 3-1
Seats and
Restraints
Head Restraints
Head Restraints . . . . . . . . . . . . . . . 3-2
Front Seats
Seat Adjustment . . . . . . . . . . . . . . 3-3
Center Seat . . . . . . . . . . . . . . . . . . . 3-5
Power Seat Adjustment . . . . . . . 3-5
Lumbar Adjustment . . . . . . . . . . . 3-7
Reclining Seatbacks . . . . . . . . . . 3-9
Seatback Latches . . . . . . . . . . . . 3-11
Heated Front Seats . . . . . . . . . . 3-11
Rear Seats
Rear Seats (Extended CabFull Bench) . . . . . . . . . . . . . . . . . 3-12
Rear Seats (All Split Bench and Hybrid Full Bench) . . . . . 3-13
Safety Belts
Safety Belts . . . . . . . . . . . . . . . . . . 3-14
How to Wear Safety BeltsProperly . . . . . . . . . . . . . . . . . . . . 3-17
Lap-Shoulder Belt . . . . . . . . . . . 3-23 Safety Belt Use During
Pregnancy . . . . . . . . . . . . . . . . . . 3-28
Lap Belt (Crew and Extended Cab) . . . . . . . . . . . . . 3-28
Safety Belt Extender . . . . . . . . . 3-29
Safety System Check . . . . . . . . 3-29
Safety Belt Care . . . . . . . . . . . . . 3-30
Replacing Safety Belt System
Parts After a Crash . . . . . . . . . 3-30
Airbag System
Airbag System . . . . . . . . . . . . . . . 3-31
Where Are the Airbags? . . . . . 3-33
When Should an AirbagInflate? . . . . . . . . . . . . . . . . . . . . . 3-34
What Makes an Airbag Inflate? . . . . . . . . . . . . . . . . . . . . . 3-36
How Does an Airbag Restrain? . . . . . . . . . . . . . . . . . . . 3-37
What Will You See After an Airbag Inflates? . . . . . . . . . . . . 3-37
Airbag On-Off Switch . . . . . . . . 3-39
Passenger Sensing System . . . . . . . . . . . . . . . . . . . . . 3-42
Servicing the Airbag-Equipped Vehicle . . . . . . . . . . . . . . . . . . . . . 3-48 Adding Equipment to the
Airbag-Equipped Vehicle . . . 3-48
Airbag System Check . . . . . . . . 3-50
Replacing Airbag System Parts After a Crash . . . . . . . . . 3-50
Child Restraints
Older Children . . . . . . . . . . . . . . . 3-51
Infants and Young
Children . . . . . . . . . . . . . . . . . . . . 3-53
Child Restraint Systems . . . . . 3-55
Where to Put the Restraint . . . 3-57
Lower Anchors and Tethers for Children (LATCH
System) . . . . . . . . . . . . . . . . . . . . 3-59
Replacing LATCH System Parts After a Crash . . . . . . . . . 3-68
Securing Child Restraints (Rear Seat Position) . . . . . . . . 3-68
Securing Child Restraints (Center Front Seat
Position) . . . . . . . . . . . . . . . . . . . 3-71
Securing Child Restraints (Right Front Seat
Position) . . . . . . . . . . . . . . . . . . . 3-71

Black plate (24,1)Chevrolet Silverado Owner Manual - 2011
3-24 Seats and Restraints
If the belt stops before it reaches
the buckle, when using the
lap-shoulder belt in a rear center
seating position of a crew-cab,
tilt the latch plate and keep
pulling the safety belt until
it can be buckled.3. Push the latch plate into thebuckle until it clicks.
Pull up on the latch plate to
make sure it is secure. If the belt
is not long enough, see Safety
Belt Extender on page 3‑29.
If the latch plate will not go fully
into the buckle, check if the
correct buckle is being used.
Position the release button on
the buckle so that the safety belt
could be quickly unbuckled if
necessary. 4. If equipped with a shoulder belt
height adjuster, move it to the
height that is right for you. See
“Shoulder Belt Height Adjuster”
later in this section.
5. To make the lap part tight, pull
up on the shoulder belt.
It may be necessary to pull
stitching on the safety belt
through the latch plate to fully
tighten the lap belt on smaller
occupants.

Black plate (29,1)Chevrolet Silverado Owner Manual - 2011
Seats and Restraints 3-29
Buckle, position, and release it the
same way as the lap part of a
lap-shoulder belt.
To make the belt shorter, pull its free
end as shown until the belt is snug.
If the belt is not long enough, see
Safety Belt Extender on page 3‑29.
Make sure the release button on the
buckle is positioned so you would
be able to unbuckle the safety belt
quickly if necessary.
Safety Belt Extender
If the vehicle's safety belt will fasten
around you, you should use it.
But if a safety belt is not long
enough, your dealer will order you
an extender. When you go in to
order it, take the heaviest coat you
will wear, so the extender will be
long enough for you. To help avoid
personal injury, do not let someone
else use it, and use it only for the
seat it is made to fit. The extender
has been designed for adults.
Never use it for securing child seats.
To wear it, attach it to the regular
safety belt. For more information,
see the instruction sheet that comes
with the extender.
Safety System Check
Now and then, check that the safety
belt reminder light, safety belts,
buckles, latch plates, retractors,
and anchorages are working
properly. Look for any other loose
or damaged safety belt system parts
that might keep a safety belt system
from doing its job. See your dealer
to have it repaired. Torn or frayed
safety belts may not protect you in
a crash. They can rip apart under
impact forces. If a belt is torn or
frayed, get a new one right away.
Make sure the safety belt reminder
light is working. SeeSafety Belt
Reminders
on page 5‑21for more
information.
Keep safety belts clean and
dry. See Safety Belt Care
on
page 3‑30.

Black plate (32,1)Chevrolet Silverado Owner Manual - 2011
3-32 Seats and Restraints
{WARNING
Airbags inflate with great force,
faster than the blink of an eye.
Anyone who is up against, or
very close to, any airbag when it
inflates can be seriously injured
or killed. Do not sit unnecessarily
close to the airbag, as you would
be if you were sitting on the edge
of your seat or leaning forward.
Safety belts help keep you in
position before and during a
crash. Always wear your safety
belt, even with airbags. The driver
should sit as far back as possible
while still maintaining control of
the vehicle.
Occupants should not lean on
or sleep against the door or side
windows in seating positions with
seat-mounted side impact airbags
and/or roof-rail airbags.
{WARNING
Children who are up against,
or very close to, any airbag
when it inflates can be seriously
injured or killed. Airbags plus
lap-shoulder belts offer protection
for adults and older children,
but not for young children and
infants. Neither the vehicle's
safety belt system nor its airbag
system is designed for them.
Young children and infants need
the protection that a child restraint
system can provide. Always
secure children properly in
your vehicle. To read how, see
Older Children
on page 3‑51or
Infants and Young Children
on
page 3‑53
.
There is an airbag readiness light
on the instrument panel cluster,
which shows the airbag symbol.
The system checks the airbag
electrical system for malfunctions.
The light tells you if there is an
electrical problem. See Airbag
Readiness Light
on page 5‑22for more information.

Black plate (34,1)Chevrolet Silverado Owner Manual - 2011
3-34 Seats and Restraints
Driver Side Shown, PassengerSide Similar
If the vehicle has roof-rail
airbags for the driver, right front
passenger, and second row
outboard passengers, they are in
the ceiling above the side windows.
{WARNING
If something is between an
occupant and an airbag, the
airbag might not inflate properly
or it might force the object into (Continued)
WARNING (Continued)
that person causing severe injury
or even death. The path of an
inflating airbag must be kept
clear. Do not put anything
between an occupant and an
airbag, and do not attach or put
anything on the steering wheel
hub or on or near any other
airbag covering.
Do not use seat accessories
that block the inflation path of a
seat-mounted side impact airbag.
Never secure anything to the roof
of a vehicle with roof-rail airbags
by routing a rope or tie down
through any door or window
opening. If you do, the path of
an inflating roof-rail airbag will
be blocked.
When Should an Airbag
Inflate?
Frontal airbags are designed
to inflate in moderate to severe
frontal or near-frontal crashes to
help reduce the potential for severe
injuries mainly to the driver's or right
front passenger's head and chest.
However, they are only designed
to inflate if the impact exceeds
a predetermined deployment
threshold. Deployment thresholds
are used to predict how severe a
crash is likely to be in time for the
airbags to inflate and help restrain
the occupants.
Whether the frontal airbags will
or should deploy is not based on
how fast your vehicle is traveling.
It depends largely on what you hit,
the direction of the impact, and how
quickly your vehicle slows down.