2003 CHEVROLET SILVERADO ECU

A. Push and Pull
B. Rotate Tire
7. Make sure the tire is stored securely. Push, pull,
and then try to rotate or turn the tire. If the tire
moves, use the wheel wrench to tighten the cable.
Reinstall the spare tire lock (if equipped).
Secondary Latch System
Your vehicle has an underbody mounted tire hoist
assembly equipped with a secondary latch system. It's
designed to stop the spare tire from suddenly falling
off your vehicle. For the secondary latch to work,
the spare must be installed with the valve stem pointing
down. See ªStoring a Flat or Spare Tire, Jack and
Toolsº earlier in this section.
{CAUTION:
Before beginning this procedure read all the
instructions. Failure to read and follow the
instructions could damage the hoist assembly
and you and others could get hurt. Read and
follow the instructions listed below.
5-96

To release the spare tire from the secondary latch do
the following:
1. Check under the vehicle to see if the cable end is
visible.
2. If the cable is not visible proceed to Step 6.
If it is visible, ®rst try to tighten the cable by turning
the wheel wrench clockwise until you hear two
clicks or feel it skip twice. You cannot overtighten
the cable.
3. Loosen the cable by turning the wrench
counterclockwise three or four turns.4. Repeat this procedure at least two times. If the
spare tire lowers to the ground, continue with
Step 5 of ªRemoving the Spare Tire and Toolsº
earlier in this section.
5. Turn the wrench counterclockwise until
approximately six inches (15 cm) of cable is
exposed.
6. Stand the wheel blocks
on their shortest ends,
with the backs
facing each other.
7. Place the bottom edge of the jack on the wheel
blocks, separating them so that the jack is
balanced securely.
5-97

At Least Twice a Year
Restraint System Check
Make sure the safety belt reminder light and all your
belts, buckles, latch plates, retractors and anchorages
are working properly. Look for any other loose or
damaged safety belt system parts. If you see anything
that might keep a safety belt system from doing its
job, have it repaired. Have any torn or frayed safety belts
replaced.
Also look for any opened or broken air bag coverings,
and have them repaired or replaced. (The air bag
system does not need regular maintenance.)
Wiper Blade Check
Inspect wiper blades for wear or cracking. Replace
blade inserts that appear worn or damaged or that
streak or miss areas of the windshield. Also see
Cleaning the Outside of Your Vehicle on page 5-103.
Spare Tire Check
At least twice a year, after the monthly in¯ation check of
the spare tire determines that the spare is in¯ated to
the correct tire in¯ation pressure, make sure that
the spare tire is stored securely. Push, pull, and then try
to rotate or turn the tire. If it moves, use the wheel
wrench/ratchet to tighten the cable. See
Changing a Flat
Tire on page 5-80.
Weatherstrip Lubrication
Silicone grease on weatherstrips will make them last
longer, seal better, and not stick or squeak. Apply
silicone grease with a clean cloth. During very cold,
damp weather more frequent application may be
required. See
Part D: Recommended Fluids and
Lubricants on page 6-19.
Manual Transmission Check
Check the transmission ¯uid level; add if needed. SeeManual Transmission Fluid on page 5-28. Check
for leaks. A ¯uid leak is the only reason for ¯uid loss.
Have the system inspected and repaired if needed.
Automatic Transmission Check
Check the transmission ¯uid level; add if needed. SeeAutomatic Transmission Fluid (Except Allison
Transmissionž) on page 5-23orAutomatic Transmission
Fluid (Allison Transmissionž) on page 5-26. A ¯uid
loss may indicate a problem. Check the system
and repair if needed.
6-13

Bulb Replacement (cont.)
Taillamps....................................................5-65
Buying New Tires...........................................5-74
C
California Fuel.................................................. 5-5
Canada ± Customer Assistance.......................... 7-4
Canadian Owners................................................ ii
Canadian Roadside Assistance........................... 7-6
Capacities and Speci®cations..........................5-118
Car Washes for QUADRASTEERŸ Equipped
Vehicles.....................................................4-18
Carbon Monoxide...................4-48, 4-68, 2-13, 2-51
Care of........................................................5-103
Safety Belts..............................................5-103
Your Cassette Tape Player..........................3-123
Your CD and DVD Player...........................3-124
Your CDs and DVDs..................................3-124
CARGO LAMP ON.........................................3-65
Cargo Lamp...................................................3-17
Cassette Tape Messages.................................3-94
Cassette Tape Player Service...........................6-12
CD Adapter Kits.............................................3-95
Center Console Storage Area...........................2-65
Center High-Mounted Stoplamp (CHMSL) and
Cargo Lamp...............................................5-63
Center Instrument Panel Fuse Block................5-112
Center Passenger Position, Safety Belts.............1-24Chains, Tires..................................................5-78
CHANGE ENGINE OIL....................................3-66
Check Engine Light.........................................3-49
CHECK OIL LEVEL.........................................3-66
CHECK WASHER FLUID.................................3-66
Checking Brake Fluid......................................5-45
Checking Coolant............................................5-32
Checking Engine Oil........................................5-16
Checking Things Under the Hood....................... 5-8
Checking Your Restraint Systems......................1-81
Check...........................................................3-49
Engine Light...............................................3-49
Chemical Paint Spotting.................................5-106
Child Restraints..............................................1-38
Child Restraint Systems...............................1-38
Infants and Young Children...........................1-34
Lower Anchorages and Top Tethers for
Children (LATCH System)..........................1-47
Older Children.............................................1-31
Securing a Child Restraint Designed for the
LATCH System........................................1-49
Securing a Child Restraint in a Center Rear
Seat Position...........................................1-52
Securing a Child Restraint in a Rear Outside
Seat Position...........................................1-50
Securing a Child Restraint in the Center Front
Seat Position...........................................1-55
Securing a Child Restraint in the Right Front
Seat Position...................................1-55, 1-58
Top Strap Anchor Location............................1-44
3

D
Daytime Running Lamps..................................3-15
Defensive Driving............................................. 4-2
Defogging and Defrosting.........................3-23, 3-31
Delayed Locking............................................... 2-9
Dinghy Towing................................................4-55
Doing Your Own Service Work........................... 5-3
Dolly Towing..................................................4-57
Dome Lamps.................................................3-18
Door............................................................... 2-9
Delayed Locking........................................... 2-9
Locks.......................................................... 2-7
Power Door Locks......................................... 2-8
Programmable Automatic Door Locks.............2-10
Rear Door Security Locks.............................2-12
Rear Doors.................................................2-13
DRIVER DOOR AJAR.....................................3-66
Driver Information Center (DIC).........................3-54
DIC Operation and Displays..........................3-55
DIC Warnings and Messages........................3-65
Driver............................................................1-16
Position, Safety Belt.....................................1-16
Driving Across an Incline..................................4-34
Driving Downhill..............................................4-32
Driving in Mud, Sand, Snow or Ice....................4-36
Driving in Water..............................................4-37
Driving On Grades..........................................4-87
Driving on Off-Road Hills.................................4-28
Driving on Snow or Ice....................................4-49Driving Through Deep Standing Water...............4-41
Driving Through Flowing Water.........................4-41
Driving Uphill..................................................4-29
Driving with a Trailer.......................................4-86
Driving..........................................................4-38
At Night.....................................................4-38
City...........................................................4-42
Defensive..................................................... 4-2
Drunken....................................................... 4-2
Freeway.....................................................4-43
Hill and Mountain Roads..............................4-46
In Rain and on Wet Roads...........................4-39
Winter........................................................4-48
Dual Automatic Climate Control System.............3-25
Dual Climate Control System............................3-22
Dual Stage Air Bags........................................1-68
Dual Tire Operation.........................................5-70
DVD ............................................................3-125
Cleaning the Video Screen..........................3-125
Distortion..................................................3-122
Rear Seat Entertainment System..................3-111
DVD Player..................................................3-111
E
Easy Exit Seat...............................................2-67
Electrical System...........................................5-109
Add-On Equipment.....................................5-109
Fuses and Circuit Breakers.........................5-110
5

Inspection (cont.)
Steering and Suspension..............................6-17
Throttle System...........................................6-18
Transfer Case and Front Axle
(All-Wheel Drive)......................................6-18
Transfer Case and Front Axle (Four-Wheel
Drive).....................................................6-18
Instrument Panel Brightness Control..................3-18
Instrument Panel Fuse Block..........................5-110
Instrument Panel.............................................3-34
Cluster.......................................................3-34
Overview..................................................... 3-4
Interior Lamps................................................3-18
J
Jump Starting.................................................5-48
K
Key Lock Cylinders Service..............................6-14
Key Release Button (Manual Transmission)........2-21
KEYFOB X BATTERY LOW.............................3-67
Keyless Entry System....................................... 2-4
Keys............................................................... 2-3
L
Lamps On Reminder.......................................3-15
Lamps...........................................................3-14
Exterior......................................................3-14
Interior.......................................................3-18
Lap Belt........................................................1-25
Lap-Shoulder Belt...........................................1-16
LATCH System...............................................1-47
Child Restraints...........................................1-47
Securing a Child Restraint Designed for the
LATCH System........................................1-49
Latches, Seatback............................................ 1-7
Leaving Your Vehicle With
the Engine Running
(Automatic Transmission Only).......................2-48
LEFT REAR DOOR AJAR (Crew Cab)...............3-67
Light.............................................................3-37
Air Bag Off .................................................3-37
Air Bag Readiness.......................................3-36
Anti-Lock Brake System Warning...................3-45
Battery Warning..........................................3-42
Brake System Warning.................................3-44
Cruise Control.............................................3-52
Four-Wheel-Drive.........................................3-52
Low Fuel Warning.......................................3-54
9

Light (cont.)
Malfunction Indicator....................................3-49
Passenger Air Bag Status Indicator................3-40
Safety Belt Reminder...................................3-36
Tow/Haul Mode...........................................3-53
Traction Off................................................3-46
Up-Shift.....................................................3-43
Listening to a DVD................................3-97, 3-110
Loading Your Vehicle for Off-Road Driving..........4-24
Loading Your Vehicle.......................................4-58
Locking Rear Axle...........................................4-13
Lockout Protection..........................................2-12
Lock-Out Switch.............................................2-17
Locks............................................................. 2-9
Delayed Locking........................................... 2-9
Door........................................................... 2-7
Lockout Protection.......................................2-12
Power Door.................................................. 2-8
Programmable Automatic Door Locks.............2-10
Rear Door Security Locks.............................2-12
Loss of Control...............................................4-21
LOW COOLANT LEVEL..................................3-67
Low Fuel Warning Light...................................3-54
Lumbar........................................................... 1-4
Power Controls............................................. 1-4M
Maintenance, Normal Replacement Parts..........5-121
Maintenance Schedule.....................................6-12
At Each Fuel Fill.........................................6-12
At Least Once a Month................................6-12
At Least Once a Year..................................6-14
At Least Twice a Year..................................6-13
At the First 100, 1,000 and 6,000 Miles
(160, 1 600 and 10 000km).......................6-12
Brake System Inspection..............................6-18
Engine Cooling System Inspection.................6-17
Exhaust System Inspection...........................6-17
Fuel System Inspection................................6-17
How This Section is Organized....................... 6-3
Introduction.................................................. 6-2
Maintenance Requirements............................. 6-2
Part A - Scheduled Maintenance Services......... 6-4
Part B - Owner Checks and Services.............6-12
Part C - Periodic MaintenanceInspections......6-17
Part D - Recommended Fluids and Lubricants . . . 6-19
Part E - Maintenance Record........................6-22
Scheduled Maintenance................................. 6-5
Steering and Suspension Inspection...............6-17
Throttle System Inspection............................6-18
10

Pickup Conversion to Chassis Cab....................4-67
Plan Ahead When Possible................................ 7-7
Playing a Cassette Tape..................................3-93
Playing a Compact Disc.................3-83, 3-95, 3-105
Playing a Speci®c Loaded
Compact Disc............................................3-107
Playing the Radio...................3-72, 3-76, 3-86, 3-99
Power Steering...............................................4-13
Power Winches..............................................4-94
Power...........................................................3-19
Accessory Outlets........................................3-19
Door Locks.................................................. 2-8
Electrical System.......................................5-109
Lumbar Controls........................................... 1-4
Seat............................................................ 1-4
Steering Fluid.............................................5-42
Windows....................................................2-16
Programmable Automatic Door Locks.................2-10
Q
QUADRASTEERŸ..........................................4-15
Questions and Answers About Safety Belts.........1-14
R
Radio Data System (RDS)...............3-75, 3-85, 3-98
Radio Messages.............................3-74, 3-80, 3-90
Radios..........................................................3-71AM-FM Radio.............................................3-72
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
Radio with Cassette and CD.........................3-85
Radio with CD............................................3-75
Radio with Six-Disc CD................................3-98
Rear Seat Audio........................................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..........................................3-121
Understanding Reception............................3-123
RANGE SHIFT INHIBITED (Allison
Transmission
žOnly).....................................3-67
RDS Messages.............................3-79, 3-89, 3-102
Rear Axle......................................................5-55
Locking......................................................4-13
Rear Door Security Locks................................2-12
Rear Doors....................................................2-13
Rear Safety Belt Comfort Guides......................1-29
Rear Seat Audio Controls...............................3-120
Rear Seat Audio (RSA)..................................3-120
Rear Seat Entertainment System.....................3-111
Rear Seat Operation...................................1-8, 1-9
Rear Seat Outside Passenger Positions
(Extended Cab and Crew Cab)......................1-26
Rear Seat Passengers, Safety Belts..................1-26
13