2003 CHEVROLET S10 radiator

When the coolant in the coolant recovery tank is at the
ADD mark, start your vehicle.
If the overheat warning continues, there's one more
thing you can try. You can add the proper mixture
directly to the radiator, but be sure the cooling system is
cool before you do it.
{CAUTION:
Steam and scalding liquids from a hot cooling
system can blow out and burn you badly. They
are under pressure, and if you turn the radiator
pressure cap Ð even a little Ð they can come
out at high speed. Never turn the cap when the
cooling system, including the radiator pressure
cap, is hot. Wait for the cooling system and
radiator pressure cap to cool if you ever have
to turn the pressure cap.
5-35

How to Add Coolant to the Radiator
1. You can remove the radiator pressure cap when
the cooling system, including the radiator pressure
cap and upper radiator hose, is no longer hot.
Turn the pressure cap slowly counterclockwise until
it ®rst stops. (Don't press down while turning the
pressure cap.)
If you hear a hiss, wait for that to stop. A hiss
means there is still some pressure left.2. Then keep turning the pressure cap, but now push
down as you turn it. Remove the pressure cap.
5-36

3. Fill the radiator with the proper DEX-COOLž
coolant mixture, up to the base of the ®ller
neck. SeeEngine Coolant on page 5-27for more
information about the proper coolant mixture.4. Then ®ll the coolant recovery tank to ADD mark.
5. Put the cap back on the coolant recovery tank, but
leave the radiator pressure cap off.
5-37

6. Start the engine and let it run until you can feel the
upper radiator hose getting hot. Watch out for the
engine cooling fan.
7. By this time, the coolant level inside the radiator
®ller neck may be lower. If the level is lower, add
more of the proper DEX-COOL
žcoolant mixture
through the ®ller neck until the level reaches
the base of the ®ller neck.8. Then replace the pressure cap. At any time during
this procedure if coolant begins to ¯ow out of the
®ller neck, reinstall the pressure cap. Be sure
the arrow on the pressure cap lines up like this.
5-38

99,000 Miles (165 000 km)
qChange engine oil and ®lter (or every 3 months,
whichever occurs ®rst).An Emission Control Service.
qLubricate chassis components (or every 3 months,
whichever occurs ®rst).(See footnote #.)
qCheck rear/front axle ¯uid level and add ¯uid as
needed. Check constant velocity joints and axle seals
for leaking.
(See footnote **.)
100,000 Miles (166 000 km)
qInspect spark plug wires.An Emission Control
Service.
qReplace spark plugs.An Emission Control Service.
qIf you haven't used your vehicle under severe service
conditions listed previously and, therefore, haven't
changed your automatic transmission ¯uid, change
both the ¯uid and ®lter.
Manual transmission ¯uid doesn't require change.
q4.3L V6 Engine Only: Inspect Positive Crankcase
Ventilation (PCV) valve.
An Emission Control
Service.
150,000 Miles (240 000 km)
qDrain, ¯ush and re®ll cooling system (or every
60 months since last service, whichever occurs ®rst).
See
Engine Coolant on page 5-27for what to use.
Inspect hoses. Clean radiator, condenser, pressure
cap and neck. Pressure test cooling system and
pressure cap.
An Emission Control Service.
qInspect engine accessory drive belt.An Emission
Control Service.
Long Trip/Highway Scheduled
Maintenance
The services shown in this schedule up to 100,000 miles
(166 000 km) should be repeated after 100,000 miles
(166 000 km) at the same intervals for the life of
this vehicle. The services shown at 150,000 miles
(240 000 km) should be repeated at the same interval
after 150,000 miles (240 000 km) for the life of this
vehicle.
See
Part B: Owner Checks and Services on page 6-26andPart C: Periodic MaintenanceInspections on
page 6-31.
6-18

qReplace fuel ®lter.An Emission Control Service.
(See footnote ².)
qReplace engine air cleaner ®lter. SeeEngine Air
Cleaner/Filter on page 5-19for more information.An Emission Control Service.
qRotate tires. SeeTire Inspection and Rotation on
page 5-64for proper rotation pattern and additional
information.(See footnote +.)
97,500 Miles (162 500 km)
qChange engine oil and ®lter (or every 12 months,
whichever occurs ®rst).An Emission Control
Service.
qLubricate chassis components (or every 12 months,
whichever occurs ®rst).(See footnote #.)
qCheck rear/front axle ¯uid level and add ¯uid as
needed. Check constant velocity joints and axle seals
for leaking.
(See footnote **.)
qRotate tires. SeeTire Inspection and Rotation on
page 5-64for proper rotation pattern and additional
information.(See footnote +.)
100,000 Miles (166 000 km)
qInspect spark plug wires.An Emission Control
Service.
qReplace spark plugs.An Emission Control Service.
qIf you haven't used your vehicle under severe service
conditions listed previously and, therefore, haven't
changed your automatic transmission ¯uid, change
both the ¯uid and ®lter. Manual transmission
¯uid doesn't require change.
q4.3L V6 Engine Only: Inspect Positive Crankcase
Ventilation (PCV) valve.
An Emission Control
Service.
150,000 Miles (240 000 km)
qDrain, ¯ush and re®ll cooling system (or every
60 months since last service, whichever occurs ®rst).
See
Engine Coolant on page 5-27for what to use.
Inspect hoses. Clean radiator, condenser, pressure
cap and neck. Pressure test the cooling system
and pressure cap.
An Emission Control Service.
qInspect engine accessory drive belt.An Emission
Control Service.
6-25

Fuel System Inspection
Inspect the complete fuel system for damage or leaks.
Engine Cooling System Inspection
Inspect the hoses and have them replaced if they
are cracked, swollen or deteriorated. Inspect all pipes,
®ttings and clamps; replace as needed. Clean the
outside of the radiator and air conditioning condenser.
To help ensure proper operation, a pressure test of
the cooling system and pressure cap is recommended
at least once a year.
Throttle System Inspection
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
(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. 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. Also inspect drum brake linings
for wear and cracks. Inspect other brake parts, including
drums, wheel cylinders, calipers, parking brake, etc.
Check parking brake adjustment. You may need to have
your brakes inspected more often if your driving
habits or conditions result in frequent braking.
6-32

Hood (cont.)
Release.....................................................5-10
Horn............................................................... 3-5
How to Add Coolant to the Coolant
Recovery Tank............................................5-34
How to Add Coolant to the Radiator..................5-36
How to Add Fluid....................................5-24, 5-26
How to Check and Add Fluid............................5-27
How to Check Lubricant..........................5-51, 5-53
How to Check Power Steering Fluid..................5-40
How to Check................................5-22, 5-25, 5-63
How to Inspect the Engine Air Cleaner/Filter.......5-21
How to Use This Manual...................................... ii
How to Wear Safety Belts Properly...................1-16
Hydraulic Clutch System Check........................6-28
Hydraulic Clutch.............................................5-26
Hydroplaning..................................................4-32
I
If No Steam Is Coming From Your Engine..........5-31
If Steam Is Coming From Your Engine...............5-30
If the Light Is Flashing.....................................3-34
If the Light Is On Steady.................................3-34
If You Are Stuck in Sand, Mud, Ice or Snow.......4-42
If You Do Decide To Pull A Trailer.....................4-55
If You're Caught in a Blizzard...........................4-40Ignition Positions.............................................2-20
Ignition Transmission Lock Check......................6-30
Infants and Young Children, Restraints...............1-32
In¯ation -- Tire Pressure..................................5-63
Inspection......................................................6-32
Brake System.............................................6-32
Engine Cooling System................................6-32
Exhaust System..........................................6-31
Fuel System...............................................6-32
Part C - Periodic Maintenance.......................6-31
Steering, Suspension and Front Drive Axle
Boot and Seal.........................................6-31
Throttle System...........................................6-32
Transfer Case and Front Axle (Four-Wheel
Drive).....................................................6-32
Installing a Garage Door Opener.......................2-42
Instrument Panel Brightness.............................3-15
Instrument Panel Fuse Block............................5-94
Instrument Panel.............................................3-23
Cluster.......................................................3-23
Overview..................................................... 3-2
Interior Lamps................................................3-15
J
Jump Seat.....................................................1-10
Jump Starting.................................................5-46
7