2003 CHEVROLET SILVERADO brake

Hydraulic Clutch System Check
Check the ¯uid level in the clutch reservoir. SeeHydraulic Clutch on page 5-29. A ¯uid loss in this
system could indicate a problem. Have the system
inspected and repaired at once.
At Least Once a Year
Key Lock Cylinders Service
Lubricate the key lock cylinders with the lubricant
speci®ed in Part D.
Body Lubrication Service
Lubricate all body door hinges, hood latch assembly,
secondary latch, pivots, spring anchor, release
pawl, tailgate hinge, tailgate linkage, tailgate handle
pivot points, latch bolt, fuel door hinge, locks and folding
seat hardware. Part D tells you what to use. More
frequent lubrication may be required when exposed to a
corrosive environment.
Starter Switch Check
{CAUTION:
When you are doing this inspection, the
vehicle could move suddenly. If the vehicle
moves, you or others could be injured.
1. Before you start, be sure you have enough room
around the vehicle.
2. Firmly apply both the parking brake and the regular
brake. See
Parking Brake on page 2-44if
necessary.
Do not use the accelerator pedal, and be ready to
turn off the engine immediately if it starts.
3. On automatic transmission vehicles, try to start the
engine in each gear. The starter should work only
in PARK (P) or NEUTRAL (N). If the starter works in
any other position, your vehicle needs service.
On manual transmission vehicles, put the shift lever
in NEUTRAL (N), push the clutch down halfway
and try to start the engine. The starter should work
only when the clutch is pushed down all the way
to the ¯oor. If the starter works when the clutch isn't
pushed all the way down, your vehicle needs
service.
6-14

Automatic Transmission Shift Lock
Control System Check
{CAUTION:
When you are doing this inspection, the
vehicle could move suddenly. If the vehicle
moves, you or others could be injured.
1. Before you start, be sure you have enough room
around the vehicle. It should be parked on a level
surface.
2. Firmly apply the parking brake. See
Parking Brake
on page 2-44if necessary.
Be ready to apply the regular brake immediately if
the vehicle begins to move.3. With the engine off, turn the key to the RUN
position, but don't start the engine. Without applying
the regular brake, try to move the shift lever out
of PARK (P) with normal effort. If the shift lever
moves out of PARK (P), your vehicle needs service.
Ignition Transmission Lock Check
While parked, and with the parking brake set, try to turn
the ignition key to LOCK in each shift lever position.
·With an automatic transmission, the key should turn
to LOCK only when the shift lever is in PARK (P).
·With a manual transmission, the key should turn to
LOCK only when you press the key release button.
On all vehicles, the key should come out only in LOCK.
6-15

Parking Brake and Automatic
Transmission Park (P) Mechanism
Check
{CAUTION:
When you are doing this check, your vehicle
could begin to move. You or others could be
injured and property could be damaged. Make
sure there is room in front of your vehicle in
case it begins to roll. Be ready to apply the
regular brake at once should the vehicle begin
to move.Park on a fairly steep hill, with the vehicle facing
downhill. Keeping your foot on the regular brake, set the
parking brake.
·To check the parking brake's holding ability: With
the engine running and transmission in
NEUTRAL (N), slowly remove foot pressure from
the regular brake pedal. Do this until the vehicle is
held by the parking brake only.
·To check the PARK (P) mechanism's holding ability:
With the engine running, shift to PARK (P). Then
release the parking brake followed by the regular
brake.
Underbody Flushing Service
At least every spring, use plain water to ¯ush any
corrosive materials from the underbody. Take care to
clean thoroughly any areas where mud and other debris
can collect.
6-16

Throttle System Inspection
(V6 Only)
Inspect the throttle system for interference or binding,
and for damaged or missing parts. Replace parts
as needed. Replace any components that have high
effort or excessive wear. Do not lubricate accelerator
and cruise control cables.
Transfer Case and Front Axle
(All-Wheel Drive) Inspection
Every 12 months, or at engine oil change intervals,
check front axle and transfer case and add lubricant
when necessary. A ¯uid loss could indicate a problem.
Check and have it repaired, if needed. Check vent
hose at transfer case for kinks and proper installation.
Transfer Case and Front Axle
(Four-Wheel Drive) Inspection
Every 12 months or at engine oil change intervals,
check front axle and transfer case and add lubricant
when necessary. A ¯uid loss could indicate a problem;
check and have it repaired, if needed. On manual
shift transfer case, oil the control lever pivot point. Check
vent hose at transfer case for kinks and proper
installation. More frequent lubrication may be required
on off-road use.
Brake System Inspection
Inspect the complete system. Inspect brake lines and
hoses for proper hook-up, binding, leaks, cracks,
cha®ng, etc. Inspect disc brake pads for wear and rotors
for surface condition. Inspect other brake parts,
including calipers, parking brake, etc. You may need to
have your brakes inspected more often if your driving
habits or conditions result in frequent braking.
6-18

Part D: Recommended Fluids and
Lubricants
Fluids and lubricants identi®ed below by name, part
number or speci®cation may be obtained from your
dealer.
Usage Fluid/Lubricant
Engine OilEngine oil with the American
Petroleum Institute Certi®ed for
Gasoline Engines starburst symbol
of the proper viscosity. To determine
the preferred viscosity for your
vehicle's engine, see
Engine Oil on
page 5-16.
Engine Coolant50/50 mixture of clean, drinkable
water and use only
DEX-COOL
žCoolant. SeeEngine
Coolant on page 5-30.
Hydraulic Brake
SystemDelco Supreme 11 Brake Fluid or
equivalent DOT-3 brake ¯uid.
Windshield
Washer SolventGM Optikleen
žWasher Solvent or
equivalent.
Usage Fluid/Lubricant
Hydraulic
Clutch System
(5±Speed
Trans.)Hydraulic Clutch Fluid (GM Part No.
U.S. 12345347, in Canada
10953517, or equivalent DOT-3
brake ¯uid).
Hydraulic
Clutch System
(6±Speed
Trans.)Hydraulic Clutch Fluid. Use only GM
Part No. U.S. 88958860, in Canada
88901244.
Power Steering
SystemGM Power Steering Fluid (GM Part
No. U.S. 1052884, in Canada
993294, or equivalent).
Manual
Transmission
(5±Speed with
Low Gear,
RPO MW3)GM Goodwrench Synthetic Manual
Transmission Fluid (GM Part No.
U.S. 12346190, in Canada
10953477) or equivalent SAE
75W-85 GL-4 gear oil.
Manual
Transmission
(5±Speed
without Low
Gear, RPO
MG5)Synchromesh Transmission Fluid
(GM Part No. U.S. 12345349, in
Canada 10953465, or equivalent).
6-19

If NHTSA receives similar complaints, it may open an
investigation, and if it ®nds that a safety defect exists in
a group of vehicles, it may order a recall and remedy
campaign. However, NHTSA cannot become involved in
individual problems between you, your dealer or
General Motors.
To contact NHTSA, you may either call the Auto Safety
Hotline toll-free at 1-800-424-9393 (or 366-0123 in
the Washington, D.C. area) or write to:
NHTSA, U.S. Department of Transportation
Washington, D.C. 20590
You can also obtain other information about motor
vehicle safety from the hotline.
Reporting Safety Defects to the
Canadian Government
If you live in Canada, and you believe that your vehicle
has a safety defect, you should immediately notify
Transport Canada, in addition to notifying General
Motors of Canada Limited. You may write to:
Transport Canada
330 Sparks Street
Tower C
Ottawa, Ontario K1A 0N5
Reporting Safety Defects to General
Motors
In addition to notifying NHTSA (or Transport Canada) in
a situation like this, we certainly hope you'll notify us.
Please call us at 1-800-222-1020, or write:
Chevrolet Motor Division
Chevrolet Customer Assistance Center
P.O. Box 33170
Detroit, MI 48232-5170
In Canada, please call us at 1-800-263-3777 (English)
or 1-800-263-7854 (French). Or, write:
General Motors of Canada Limited
Customer Communication Centre, 163-005
1908 Colonel Sam Drive
Oshawa, Ontario L1H 8P7
Service Publications Ordering
Information
Service Manuals
Service Manuals have the diagnosis and repair
information on engines, transmission, axle, suspension,
brakes, electrical, steering, body, etc.
RETAIL SELL PRICE: $120.00
7-9

A
Accessory Power Outlets.................................3-19
Adding a Snow Plow or Similar Equipment.........4-61
Adding Washer Fluid.......................................5-43
Additional Program Information........................... 7-8
Additives, Fuel................................................. 5-5
Add-On Electrical Equipment...........................5-109
Add-On Equipment..........................................4-60
Adjusting the Speakers
(Balance/Fade)..................3-74, 3-78, 3-88, 3-101
After Off-Road Driving.....................................4-37
Air Bag Systems.............................................1-64
Adding Equipment to Your Air Bag-Equipped
Vehicle...................................................1-80
Air Bag Off Switch.......................................1-71
How Does an Air Bag Restrain?....................1-69
Passenger Sensing System...........................1-76
Servicing Your Air Bag-Equipped Vehicle.........1-80
What Makes an Air Bag In¯ate?....................1-69
What Will You See After an Air Bag In¯ates?......1-70
When Should an Air Bag In¯ate?...................1-68
Where Are the Air Bags?..............................1-66
Air Bag .........................................................3-37
Off Light.....................................................3-37
Passenger Status Indicator...........................3-40
Readiness Light..........................................3-36
Air Cleaner/Filter, Engine.................................5-21
Air Conditioning..............................................3-30
All-Wheel Drive (AWD) System.........................2-44All-Wheel Drive...............................................5-54
AM-FM Radio.................................................3-72
AM .............................................................3-123
Antenna, Fixed Mast......................................3-125
Antenna, XMŸ Satellite Radio Antenna
System.....................................................3-125
Anti-Lock Brake, System Warning Light..............3-45
Anti-lock Brake System..................................... 4-6
Appearance Care..........................................5-100
Care of Safety Belts...................................5-103
Chemical Paint Spotting..............................5-106
Cleaning the Inside of Your Vehicle..............5-100
Cleaning the Outside of Your Vehicle............5-103
Finish Damage..........................................5-106
Sheet Metal Damage..................................5-105
Underbody Maintenance.............................5-106
Vehicle Care/Appearance Materials...............5-107
Weatherstrips............................................5-103
Approaching a Hill..........................................4-28
Ashtrays........................................................3-20
Audio Output................................................3-117
Audio System(s).............................................3-71
AM-FM Radio.............................................3-72
Audio Steering Wheel Controls....................3-122
Care of Your Cassette Tape Player...............3-123
Care of Your CD and DVD Player................3-124
Care of Your CDs and DVDs.......................3-124
Chime Level Adjustment.............................3-125
Fixed Mast Antenna...................................3-125
Radio with Cassette and CD.........................3-85
1

Audio System(s) (cont.)
Radio with CD............................................3-75
Radio with Six-Disc CD................................3-98
Rear Seat Audio (RSA)...............................3-120
Setting the Time for Radios with Radio Data
Systems (RDS)........................................3-72
Setting the Time for Radios without Radio
Data Systems (RDS)................................3-72
Theft-Deterrent Feature...............................3-121
Understanding Radio Reception...................3-123
XMŸ Satellite Radio Antenna System...........3-125
Automatic Headlamp System............................3-15
Automatic Transfer Case..................................2-37
Automatic Transmission Check..........................6-13
Automatic Transmission Shift Lock Control
System Check.............................................6-15
Automatic Transmission...................................2-22
Fluid..................................................5-23, 5-26
Operation...................................................2-25
Auxiliary Battery..............................................4-94
Auxiliary Roof Mounted Lamp Switch.................3-17
B
Backing Up....................................................4-86
BATTERY NOT CHARGING.............................3-65
Battery Replacement......................................... 2-6
Battery Run-Down Protection............................3-19
Battery Warning Light......................................3-42Battery..........................................................5-47
Before Leaving on a Long Trip.........................4-44
Before You Drive...........................................3-111
Before You Go Off-Roading..............................4-24
Body Lubrication Service..................................6-14
Brake Adjustment............................................5-47
Brake Fluid....................................................5-44
Brake Pedal Travel.........................................5-47
Brake Wear...................................................5-46
Brake............................................................2-44
Parking......................................................2-44
System Inspection.......................................6-18
System Warning Light..................................3-44
Brakes..........................................................5-44
Braking in Emergencies..................................... 4-8
Braking........................................................... 4-6
Break-In, New Vehicle.....................................2-20
BUCKLE PASSENGER....................................3-65
BUCKLE SEATBELT.......................................3-65
Bulb Replacement...........................................5-59
Center High-Mounted Stoplamp (CHMSL) and
Cargo Lamp............................................5-63
Front Turn Signal, Sidemarker and Daytime
Running Lamps........................................5-61
Halogen Bulbs............................................5-59
Headlamps.................................................5-59
Pickup Box Identi®cation and Fender Marker
Lamps....................................................5-65
Replacement Bulbs......................................5-67
Roof Marker Lamps.....................................5-62
2