2008 CHEVROLET SILVERADO roof

In addition, your vehicle may have a passenger
sensing system for the right front passenger’s
position, which includes sensors that are part of the
passenger’s seat. The passenger sensing system
may not operate properly if the original seat trim is
replaced with non-GM covers, upholstery or trim, or
with GM covers, upholstery or trim designed for a
different vehicle. Any object, such as an aftermarket
seat heater or a comfort enhancing pad or device,
installed under or on top of the seat fabric, could also
interfere with the operation of the passenger sensing
system. This could either prevent proper deployment
of the passenger airbag(s) or prevent the passenger
sensing system from properly turning off the
passenger airbag(s). SeePassenger Sensing
System on page 1-81.
If you have any questions about this, you should
contact Customer Assistance before you modify
your vehicle. The phone numbers and addresses
for Customer Assistance are in Step Two of
the Customer Satisfaction Procedure in this manual.
SeeCustomer Satisfaction Procedure on page 7-2.
If your vehicle has rollover roof-rail airbags, see
Different Size Tires and Wheels on page 5-88
for additional important information.Q:What if I added a snow plow? Will it keep the
airbags from working properly?
A:We have designed our airbag systems to work
properly under a wide range of conditions, including
snow plowing with vehicles that have the optional
Snow Plow Prep Package (RPO VYU). But do
not change or defeat the snow plow’s “tripping
mechanism.” If you do, it can damage your snow
plow and your vehicle, and it may cause an airbag
ination.
Q:Because I have a disability, I have to get my
vehicle modied. How can I nd out whether
this will affect my airbag system?
A:If you have questions, call Customer Assistance.
The phone numbers and addresses for Customer
Assistance are in Step Two of the Customer
Satisfaction Procedure in this manual. See
Customer Satisfaction Procedure on page 7-2.
In addition, your dealer/retailer and the service manual
have information about the location of the airbag
sensors, sensing and diagnostic module and airbag
wiring.
1-87

Outside Manual Mirrors..................................2-59
Outside Towing Mirrors..................................2-60
Outside Power Mirrors...................................2-61
Outside Power Foldaway Mirrors.....................2-62
Object Detection Systems...............................2-64
Ultrasonic Rear Parking Assist (URPA)............2-64
OnStar
®System.............................................2-67
Universal Home Remote System......................2-71
Universal Home Remote System Operation
(With Three Round LED)............................2-71Storage Areas................................................2-78
Glove Box...................................................2-78
Cupholders..................................................2-78
Instrument Panel Storage...............................2-78
Center Console Storage.................................2-79
Luggage Carrier...........................................2-79
Rear Seat Armrest........................................2-80
Cargo Management System...........................2-80
Sunroof.........................................................2-82
Section 2 Features and Controls
2-2

Retained Accessory Power (RAP)
The following vehicle accessories can be used for up to
10 minutes after the engine is turned off:
Audio System
Power Windows
OnStar®System (if equipped)
Sunroof (if equipped)
These features work when the key is in ON/RUN or
ACC/ACCESSORY. Once the key is turned from
ON/RUN to LOCK/OFF, the windows and sunroof
continue to work up to 10 minutes until any door
is opened. The radio continues to work for up to
10 minutes or until the driver’s door is opened.
Starting the Engine
If your vehicle has the DURAMAX®Diesel engine, see
the DURAMAX®Diesel manual for more information.
To place the transmission in the proper gear:
Move your shift lever to PARK (P) or NEUTRAL (N).
Your engine will not start in any other position -- this is
a safety feature. To restart when you are already
moving, use NEUTRAL (N) only.
Starting Procedure
1. With your foot off the accelerator pedal, turn the
ignition key to START. When the engine starts,
let go of the key. The idle speed will go down as
your engine gets warm. Do not race the engine
immediately after starting it. Operate the engine
and transmission gently to allow the oil to warm
up and lubricate all moving parts.
Your vehicle has a Computer-Controlled Cranking
System. This feature assists in starting the engine
and protects components. If the ignition key is turned
to the START position, and then released when the
engine begins cranking, the engine will continue
cranking for a few seconds or until the vehicle starts.
If the engine does not start and the key is held in
START for many seconds, cranking will be stopped
after 15 seconds to prevent cranking motor damage.
To prevent gear damage, this system also prevents
cranking if the engine is already running. Engine
cranking can be stopped by turning the ignition
switch to the ACC/ACCESSORY or LOCK/OFF
position.
Notice:Cranking the engine for long periods of
time, by returning the key to the START position
immediately after cranking has ended, can overheat
and damage the cranking motor, and drain the
battery. Wait at least 15 seconds between each try,
to let the cranking motor cool down.
2-24

Center Console Storage
Your vehicle may have an upper and lower center
console storage area with cupholders.
To access the upper storage area, pull lever (A) up.
To access the lower storage area, raise the upper
storage bin, then pull lever (B) up. Use the key to
lock and unlock the lower storage area.
Luggage Carrier
The vehicle may have a luggage carrier that can be
used to load things on top of the vehicle.
The luggage carrier has siderails attached to the roof.
It may also have crossrails which can be moved
back and forth to help secure cargo. Tie the load
to the siderails or siderail supports.
Notice:Loading cargo on the luggage carrier that
weighs more than 200 lbs (91 kg) or hangs over
the rear or sides of the vehicle may damage your
vehicle. Load cargo so that it rests on the slats
as far forward as possible and against the side rails,
making sure to fasten it securely.
Do not exceed the maximum vehicle capacity when
loading your vehicle. For more information on vehicle
capacity and loading, seeLoading Your Vehicle on
page 4-36.
To prevent damage or loss of cargo while you are
driving, check to make sure the luggage and cargo are
still securely fastened.
2-79

Be sure the cargo is properly loaded.
If small heavy objects are placed on the roof, cut a
piece of 3/8 inch plywood to t inside the crossrails
and siderails to spread the load. Tie the plywood
to the siderail supports.
Tie the load to the crossrails or the siderail
supports. Use the crossrails only to keep the load
from sliding. To move a crossrail, lift the release
lever, on both sides of the rail, up to loosen it. Slide
the crossrail to the desired position balancing the
force side to side. Press the release lever on both
sides of the rail, down to tighten it. Try to slide the
crossrail back and forth slightly to be sure it is tight.
If you need to carry long items, move the crossrails
as far apart as they will go. Tie the load to the
crossrails and the siderails or siderail supports. Also
tie the load to the bumpers. Do not tie the load so
tightly that the crossrails or siderails are damaged.
After moving a crossrail, be sure it is securely locked
into the siderail.Your vehicle has a Center High-Mounted
Stoplamp (CHMSL) located above the rear glass.
If items are loaded on the roof of the vehicle, care
should be taken not to block or damage the CHMSL unit.
Rear Seat Armrest
Your vehicle may have a rear seat armrest that contains
two cupholders. To access the cupholders, pull the
armrest down from the rear seatback.
Cargo Management System
Your vehicle may have a cargo management system.
It is located in the bed of the truck. The system contains
three rails located on the front and sides of the bed.
The system will include four adjustable cargo tie-downs.
The tie-downs can be placed on the upper and lower
slides of the rail.
2-80

Sunroof
If your vehicle has a power sliding sunroof, the ignition
needs to be turned to RUN, or the Retained Accessory
Power (RAP) must be activated to open or close
the sunroof. When RAP is active, the sunroof will work
for 10 minutes after the ignition is turned off, or until
the driver’s door is opened. SeeRetained Accessory
Power (RAP) on page 2-24for more information.
Extended Cab
If your vehicle is an
extended-cab, the sunroof
switch is located on the
headliner above the
rearview mirror.
Vent:From the closed position, press and hold the rear
of the switch to vent the sunroof. To close the sunroof,
press and hold the front of the switch.Open:From the vent position, the sunroof can be fully
opened either manually or by using the express-open
feature. To open manually, press the rear of the switch
to the rst depression and hold until the sunroof
has reached the desired position. To open using
express-open, press the rear of the switch fully and
release. The sunroof will move to the full open position.
To stop the sunroof partway, press the switch a
second time.
Close:From the vent, or open position, press and hold
the front of the switch to close the sunroof.
The sunroof also has a roller sunshade that can be
used to block the rays of the sun. The roller sunshade
can be manually operated with the sunroof in an open
or closed position. To open the sunshade, press
and unlatch it, and roll it back. To close, pull it
forward and latch it into the closed position.
When the sunroof is opened, an air deector will
automatically raise. The air deector will retract when
the sunroof is closed.
2-82

Crew Cab
If your vehicle is a crew
cab, there are two sunroof
switches located in the
overhead console above
the rearview mirror.
Vent:From the closed position, press the rear of the
passenger’s side switch to vent the sunroof. To close the
sunroof, press and hold the front of the passenger’s
side switch.
Manual-Open/Manual-Close:To open the sunroof
press and hold the rear of the driver’s side switch until
the sunroof reaches the desired position. To close
the sunroof, press and hold the front of the driver’s side
switch until the sunroof reaches the desired position.
When the sunroof is opened, an air deector will
automatically raise. The air deector will retract when
the sunroof is closed.Express-Open/Express-Close:To express-open the
sunroof, fully press and release the rear of the driver’s
side switch. The sunroof will open automatically. To stop
the sunroof partway, press the switch a second time.
To express-close the sunroof, fully press and release the
front of the driver’s side switch. The sunroof will close
automatically. To stop the sunroof partway, press the
switch a second time.
The sunroof also has a sunshade which you can pull
forward to block sun rays. The sunshade must be opened
and closed manually.
Anti-Pinch Feature (Crew Cab Only):If an object is in
the path of the sunroof while it is closing, the anti-pinch
feature will detect the object and stop the sunroof from
closing at the point of the obstruction. The sunroof will
then open halfway, and the air deector will raise.
To close the sunroof once it has re-opened, refer to the
Express-Close or Manual-Close functions described
previously. If the sunroof is in the vent position, and there
is an object in the path of the sunroof when it closing,
the anti-pinch feature will detect the object and stop
the sunroof. To close the sunroof once it has stopped,
refer to the Vent functions described previously.
2-83

Instrument Panel Overview...............................3-4
Instrument Panel Overview
(Base/Uplevel version).................................3-4
Instrument Panel Overview (Premium version). . . .3-6
Hazard Warning Flashers................................3-8
Other Warning Devices...................................3-8
Horn .............................................................3-8
Tilt Wheel.....................................................3-8
Turn Signal/Multifunction Lever.........................3-9
Turn and Lane-Change Signals.......................3-10
Headlamp High/Low-Beam Changer.................3-10
Flash-to-Pass...............................................3-11
Windshield Wipers........................................3-11
Rainsense™ II Wipers...................................3-12
Windshield Washer.......................................3-12
Cruise Control..............................................3-13
Exterior Lamps.............................................3-17
Headlamps on Reminder................................3-18
Daytime Running Lamps (DRL).......................3-18
Automatic Headlamp System..........................3-19
Puddle Lamps..............................................3-20
Fog Lamps ..................................................3-20
Auxiliary Roof Mounted Lamp.........................3-20
Instrument Panel Brightness...........................3-21
Dome Lamps ...............................................3-21
Dome Lamp Override....................................3-21
Entry Lighting...............................................3-21Exit Lighting.................................................3-21
Reading Lamps............................................3-22
Cargo Lamp.................................................3-22
Electric Power Management...........................3-22
Battery Run-Down Protection..........................3-23
Accessory Power Outlet(s).............................3-23
Ashtray(s) and Cigarette Lighter......................3-24
Climate Controls............................................3-25
Climate Control System
(With Air Conditioning )..............................3-25
Climate Control System (Heater Only)..............3-28
Dual Automatic Climate Control System...........3-29
Outlet Adjustment.........................................3-35
Warning Lights, Gages, and Indicators............3-36
Instrument Panel Cluster................................3-37
Speedometer and Odometer...........................3-38
Trip Odometer..............................................3-38
Tachometer.................................................3-38
Safety Belt Reminders...................................3-39
Airbag Readiness Light..................................3-40
Airbag Off Light............................................3-41
Passenger Airbag Status Indicator...................3-43
Charging System Light..................................3-45
Voltmeter Gage............................................3-45
Brake System Warning Light..........................3-46
Anti-lock Brake System (ABS) Warning Light. . . .3-47
Section 3 Instrument Panel
3-1