heater CHEVROLET SILVERADO 2004 1.G User Guide

What to Use
Use a mixture of one-halfclean, drinkable waterand
one-half DEX-COOL®coolant which won’t damage
aluminum parts. If you use this coolant mixture,
you don’t need to add anything else.
{CAUTION:
Adding only plain water to your cooling
system can be dangerous. Plain water, or
some other liquid such as alcohol, can boil
before the proper coolant mixture will. Your
vehicle’s coolant warning system is set for the
proper coolant mixture. With plain water or the
wrong mixture, your engine could get too hot
but you would not get the overheat warning.
Your engine could catch re and you or others
could be burned. Use a 50/50 mixture of clean,
drinkable water and DEX-COOL
®coolant.Notice:If you use an improper coolant mixture,
your engine could overheat and be badly damaged.
The repair cost would not be covered by your
warranty. Too much water in the mixture can freeze
and crack the engine, radiator, heater core and
other parts.
If you have to add coolant more than four times a year,
have your dealer check your cooling system.
Notice:If you use the proper coolant, you do not
have to add extra inhibitors or additives which claim
to improve the system. These can be harmful.
Checking Coolant
The coolant surge tank is
located in the engine
compartment on the
passenger’s side of the
vehicle. SeeEngine
Compartment Overview on
page 5-14for more
information on location.
5-36

If No Steam Is Coming From
Your Engine
An overheat warning, along with a low coolant condition,
can indicate a serious problem. For more information,
seeDriver Information Center (DIC) on page 3-53.
If you get an engine overheat warning and don’t have a
low coolant condition, but see or hear no steam, the
problem may not be too serious. Sometimes the engine
can get a little too hot when you:
Climb a long hill on a hot day.
Stop after high speed driving.
Idle for long periods in traffic.
Tow a trailer. See “Driving on Grades” under
Towing a Trailer on page 4-70.
If you get the overheat warning with no sign of steam,
try this for a minute or so:
1. If you have an air conditioner and it’s on, turn it off.
2. Turn on your heater to full hot at the highest fan
speed and open the window as necessary.3. If you’re in a traffic jam, shift to NEUTRAL (N);
otherwise, shift to the highest gear while
driving – AUTOMATIC OVERDRIVE
Xor
DRIVE (D) for automatic transmissions.
If you no longer have the overheat warning, you can
drive. Just to be safe, drive slower for about 10 minutes.
If the warning doesn’t come back on, you can
drive normally.
If the warning continues, pull over, stop, and park your
vehicle right away.
If there’s still no sign of steam, push down the
accelerator until the engine speed is about twice as fast
as normal idle speed for at least three minutes while
you’re parked. If you still have the warning,turn off the
engine and get everyone out of the vehicleuntil it
cools down. Also, see “Overheated Engine Protection
Operating Mode” listed previously in this section.
You may decide not to lift the hood but to get service
help right away.
5-40

The coolant level should
be at or above the FULL
COLD mark. If it isn’t,
you may have a leak at the
pressure cap or in the
radiator hoses, heater
hoses, radiator, water
pump or somewhere else
in the cooling system.
{CAUTION:
Heater and radiator hoses, and other engine
parts, can be very hot. Do not touch them.
If you do, you can be burned.
Do not run the engine if there is a leak. If you
run the engine, it could lose all coolant. That
could cause an engine re, and you could be
burned. Get any leak xed before you drive
the vehicle.If there seems to be no leak, start the engine again.
The engine cooling fan speed should increase when idle
speed is doubled by pushing the accelerator pedal
down. If it doesn’t, your vehicle needs service.
Turn off the engine.
Notice:Engine damage from running your engine
without coolant is not covered by your warranty.
See “Overheated Engine Protection Operating
Mode” in the Index for information on driving to a
safe place in an emergency.
Notice:Using coolant other than DEX-COOL
®may
cause premature engine, heater core or radiator
corrosion. In addition, the engine coolant may
require changing sooner, at 30,000 miles (50 000 km)
or 24 months, whichever occurs rst. Any repairs
would not be covered by your warranty. Always use
DEX-COOL
®(silicate-free) coolant in your vehicle.
5-42

{CAUTION:
Adding only plain water to your cooling
system can be dangerous. Plain water, or
some other liquid such as alcohol, can boil
before the proper coolant mixture will. Your
vehicle’s coolant warning system is set for the
proper coolant mixture. With plain water or the
wrong mixture, your engine could get too hot
but you would not get the overheat warning.
Your engine could catch re and you or others
could be burned. Use a 50/50 mixture of clean,
drinkable water and a proper coolant.
Notice:In cold weather, water can freeze and crack
the engine, radiator, heater core and other parts.
Use the recommended coolant and the proper
coolant mixture.
{CAUTION:
You can be burned if you spill coolant on hot
engine parts. Coolant contains ethylene glycol
and it will burn if the engine parts are hot
enough. Do not spill coolant on a hot engine.
1. Park the vehicle on a
level surface. You can
remove the coolant
surge tank pressure
cap when the cooling
system, including
the coolant surge tank
pressure cap and
upper radiator hose, is
no longer hot.
2. Turn the pressure cap slowly counterclockwise (left)
about one full turn. If you hear a hiss, wait for that to
stop. A hiss means there is still some pressure left.
3. Then keep turning the pressure cap slowly, and
remove it.
5-44

*1— Gasoline Engine and Diesel Engine.
*2— Gasoline Engine; ECMRPV — Diesel Engine.
*3— Gasoline Engine; FUEL HT — Diesel Engine.
*4— Gasoline Engine; ECM I — Diesel Engine.
*5— IGN/EDU
Fuses Usage
GLOW PLUGDiesel Glow Plugs and Intake
Air Heater
CUST FEED Gasoline Accessory Power
STUD #1Auxiliary Power (Single
Battery and Diesels Only)/
Dual Battery (TP2) Do not
install fuse.
MBECMid Bussed Electrical Center
Power Feed, Front Seats,
Right Doors
BLOWER Front Climate Control Fan
LBECLeft Bussed Electrical
Center, Door Modules, Door
Locks, Auxiliary Power
Outlet — Rear Cargo Area
and Instrument Panel
Fuses Usage
STUD 2Accessory Power/Trailer
Wiring Brake Feed
ABS Anti-Lock Brakes
VSES/ECAS Vehicle Stability
IGN A Ignition Power
IGN B Ignition Power
LBEC 1Left Bussed Electrical Center,
Left Doors, Truck Body
Controller, Flasher Module
TRL PARK Parking Lamps Trailer Wiring
RR PARKRight Rear Parking and
Sidemarker Lamps
LR PARKLeft Rear Parking and
Sidemarker Lamps
PARK LP Parking Lamps Relay
STARTER Starter Relay
INTPARK Interior Lamps
STOP LP Stoplamps
TBC BATTTruck Body Controller
Battery Feed
SUNROOF Sunroof
SEO B2 Off-Road Lamps
5-129

Chime Level Adjustment.................................3-130
Cigarette Lighter.............................................3-20
Cleaning
Inside of Your Vehicle.................................5-114
Outside of Your Vehicle..............................5-117
Underbody Maintenance.............................5-120
Weatherstrips............................................5-117
Cleaning Aluminum or Chrome-Plated Wheels.....5-119
Cleaning Exterior Lamps/Lenses......................5-118
Cleaning Fabric/Carpet...................................5-114
Cleaning Glass Surfaces................................5-116
Cleaning Interior Plastic Components...............5-116
Cleaning Leather...........................................5-116
Cleaning the Mirror.................................2-58, 2-60
Cleaning the Top of the Instrument Panel.........5-116
Cleaning the Video Screen.............................3-125
Cleaning the Windshield and Wiper Blades.......5-119
Cleaning Tires..............................................5-119
Cleaning Vinyl..............................................5-116
Climate Control System...................................3-20
Dual..........................................................3-22
Dual Automatic............................................3-25
Clutch, Hydraulic.............................................5-34
Compass Calibration...............................2-57, 2-59
Compass Operation.........................................2-59
Compass Variance..................................2-56, 2-59
Content Theft-Deterrent....................................2-20Control of a Vehicle.......................................... 4-5
Coolant
Engine Temperature Gage............................3-46
Heater, Engine............................................2-26
Surge Tank Pressure Cap.............................5-38
Cooling System..............................................5-41
Crew Cab......................................................1-56
Cruise Control................................................3-10
Cruise Control Light........................................3-51
Cupholder(s)..................................................2-67
Current and Past Model Order Forms................7-12
Customer Assistance Information
Courtesy Transportation.................................. 7-7
Customer Assistance for Text Telephone (TTY)
Users....................................................... 7-4
Customer Assistance Offices........................... 7-4
Customer Satisfaction Procedure..................... 7-2
GM Mobility Program for Persons
with Disabilities.......................................... 7-5
Reporting Safety Defects to General Motors.......7-11
Reporting Safety Defects to the Canadian
Government............................................7-11
Reporting Safety Defects to the United States
Government............................................7-10
Roadside Assistance Program......................... 7-6
Service Publications Ordering Information........7-11
4

E
Easy Exit Seat...............................................2-72
Electrical System
Add-On Equipment.....................................5-123
Fuses and Circuit Breakers.........................5-123
Power Windows and Other Power Options.......5-123
Windshield Wiper Fuses.............................5-123
Electronic Transfer Case..................................2-44
Emissions Inspection and Maintenance
Programs...................................................3-50
Engine
Air Cleaner/Filter.........................................5-25
Battery.......................................................5-52
Check and Service Engine Soon Light............3-48
Coolant......................................................5-35
Coolant Heater............................................2-26
Coolant Temperature Gage...........................3-46
Drive Belt Routing.......................................6-18
Engine Compartment Overview......................5-14
Exhaust.....................................................2-53
Fan Noise..................................................5-46
Oil .............................................................5-20
Overheating................................................5-38
Starting......................................................2-24
ENGINE COOLANT HOT.................................3-66
Engine Hour Meter Display...............................3-35
Engine Oil Additives........................................5-23
ENGINE OVERHEATED..................................3-66Entry Lighting.................................................3-18
Environmental Concerns..................................4-25
Event Data Recorders (EDR)............................. 7-9
Exit Lighting...................................................3-18
Express Down Windows..................................2-18
Extended Cab........................................1-56, 2-14
Extended Cab and Crew Cab...........................1-53
Extender, Safety Belt.......................................1-31
Exterior Lamps...............................................3-13
F
Fifth Wheel and Gooseneck Trailering................4-89
Filter
Engine Air Cleaner......................................5-25
Finding a Program Type (PTY) Station
(RDS and XM™).......................3-79, 3-90, 3-104
Finding a Station..................3-74, 3-77, 3-88, 3-102
Finish Care..................................................5-118
Finish Damage.............................................5-120
Five-Speed (VORTEC™ 4300 V6 and
4800 V8 Engines)........................................2-32
Five-Speed (VORTEC™ 6000 V8 Engine)...........2-31
Fixed Mast Antenna.......................................3-130
Flash-to-Pass................................................... 3-9
Flat Tire........................................................5-92
Flat Tire, Changing.........................................5-93
6

Theft-Deterrent Systems...................................2-20
Content Theft-Deterrent................................2-20
Passlock
®...................................................2-22
TIGHTEN FUEL CAP......................................3-70
Tilt Wheel........................................................ 3-7
Tire Sidewall Labeling......................................5-74
Tire Size.......................................................5-77
Tire Terminology and Denitions........................5-79
Tires.............................................................5-74
Buying New Tires........................................5-86
Chains.......................................................5-91
Changing a Flat Tire....................................5-93
Dual Tire Operation.....................................5-83
If a Tire Goes Flat.......................................5-92
Ination - Tire Pressure................................5-82
Inspection and Rotation................................5-83
Spare Tire................................................5-113
Uniform Tire Quality Grading.........................5-88
Wheel Alignment and Tire Balance.................5-89
Wheel Replacement.....................................5-89
When It Is Time for New Tires......................5-86
To Use the Engine Coolant Heater....................2-26
Tonneau Cover...............................................2-68
Top Strap......................................................1-42
Top Strap Anchor Location...............................1-43
Torque Lock (Automatic Transmission)...............2-51
Total Weight on Your Vehicle’s Tires..................4-88
Tow/Haul Mode (Automatic Transmission)...........2-30
Tow/Haul Mode Light.......................................3-52
Tow/Haul Mode, Overdrive Disable....................3-52Towing
Power Take-Off (PTO)................................4-100
Recreational Vehicle.....................................4-53
Towing a Trailer..........................................4-70
Your Vehicle...............................................4-52
Traction
Assist System (TAS)...................................... 4-9
Manual Selectable Ride................................4-11
Off Light.....................................................3-45
TRACTION ACTIVE........................................3-70
Trailer
Recommendations.......................................4-69
Trailer Brakes.................................................4-90
Trailer Wiring Harness.....................................4-95
TRANS HOT IDLE ENGINE (Allison
Transmission
®Only).....................................3-71
Transfer Case........................................5-58, 5-60
Transmission
Fluid, Automatic..................................5-27, 5-30
Fluid, Manual..............................................5-33
Temperature Gage.......................................3-46
Up-Shift Light..............................................3-43
TRANSMISSION HOT.....................................3-70
Transmission Operation, Automatic....................2-27
Transmission Operation, Manual........................2-31
Transmission, Transaxle, Transfer Case Unit
Repair Manual............................................7-11
Transportation Options...................................... 7-8
Traveling to Remote Areas...............................4-25
Trip Information Button....................................3-54
16