2003 CHEVROLET SILVERADO oil reset

Coolant Surge Tank Pressure Cap
SeeEngine Compartment
Overview on page 5-10for
more information on
location.
The coolant surge tank pressure cap must be fully
installed on the coolant surge tank.
Notice:Your pressure cap is a pressure-type cap
and must be tightly installed to prevent coolant loss
and possible engine damage from overheating.
See ªCapacities and Speci®cationsº for more
information.
Engine Overheating
You will ®nd a coolant temperature gage on your
vehicle's instrument panel. SeeEngine Coolant
Temperature Gage on page 3-47. In addition, you will
®nd a LOW COOLANT LEVEL, ENGINE OVERHEATED
and a REDUCED ENGINE POWER message in the
Driver Information Center on the instrument panel. See
Driver Information Center (DIC) on page 3-54.
Overheated Engine Protection
Operating Mode (V8 Engines Only)
If an overheated engine condition exists and the
REDUCED ENGINE POWER message is displayed, an
overheat protection mode which alternates ®ring
groups of cylinders helps prevent engine damage. In
this mode, you will notice a loss in power and engine
performance. This operating mode allows your vehicle to
be driven to a safe place in an emergency. Driving
extended miles (km) and/or towing a trailer in the
overheat protection mode should be avoided.
Notice:After driving in the overheated engine
protection operating mode, to avoid engine damage,
allow the engine to cool before attempting any repair.
The engine oil will be severely degraded. Repair the
cause of coolant loss, change the oil and reset the oil
life system. See ªEngine Oilº in the Index.
5-33

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) and 200,000 miles (332 000 km) should
be repeated at the same interval after 150,000 miles
(240 000 km) and 200,000 miles (332 000 km) for the life
of this vehicle.
See
Part B: Owner Checks and Services on page 6-12andPart C: Periodic MaintenanceInspections on
page 6-17.
Footnotes
²The U.S. Environmental Protection Agency or the
California Air Resources Board has determined that the
failure to perform this maintenance item will not nullify
the emission warranty or limit recall liability prior to
the completion of the vehicle 's useful life. We, however,
urge that all recommended maintenance services be
performed at the indicated intervals and the
maintenance be recorded.
+A good time to check your brakes is during tire
rotation. See Brake System Inspection on page 6-18.
Engine Oil and Chassis Lubrication
Scheduled Maintenance
Change engine oil and ®lter as indicated by the GM
Oil Life System (or every 12 months, whichever
occurs ®rst). Reset the system.
Your vehicle has a computer system that lets you know
when to change the engine oil and ®lter. This is
based on engine revolutions and engine temperature,
and not on mileage. Based on driving conditions,
the mileage at which an oil change will be indicated can
vary considerably. For the oil life system to work
properly, you must reset the system every time the oil is
changed.
When the system has calculated that oil life has been
diminished, it will indicate that an oil change is
necessary. A CHANGE ENGINE OIL message will
come on. Change your oil as soon as possible within
the next two times you stop for fuel. It is possible that, if
you are driving under the best conditions, the oil life
system may not indicate that an oil change is necessary
for over a year. However, your engine oil and ®lter
must be changed at least once a year and at this time
the system must be reset. Your dealer has GM-trained
service people who will perform this work using
genuine GM parts and reset the system.
6-5

It is also important to check your oil regularly and keep
it at the proper level.
If the system is ever reset accidentally, you must
change your oil at 3,000 miles (5 000 km) since your
last oil change. Remember to reset the oil life system
whenever the oil is changed. See
Engine Oil on
page 5-16for information on resetting the system.
An Emission Control Service.
Lubricate chassis components with each engine oil
and ®lter change. Vehicles used under severe
commercial operating conditions require lubrication
on a regular basis every 3,000 miles (5 000 km).
Lubricate the front suspension, ball joints, steering
linkage, transmission shift linkage and parking brake
cable guides. Ball joints should not be lubricated unless
their temperature is 10ÉF (-12ÉC) or higher or they
could be damaged.
See the mileage intervals following for additional
services that may be performed with an engine oil
change and chassis lubrication. After the services are
performed, record the date, odometer reading and
who performed the service on the maintenance record
pages in Part E of this schedule.
7,500 Miles (12 500 km)
qCheck rear/front axle ¯uid level and add ¯uid as
needed. Check constant velocity joints and axle seals
for leaking.
qRotate tires. See
Tire Inspection and Rotation on
page 5-71for proper rotation pattern and additional
information.(See footnote +.)
qAllison TransmissionžOnly: Replace the external
control-main ®lter.
15,000 Miles (25 000 km)
qInspect engine air cleaner ®lter or change indicator (if
equipped). If necessary, replace the ®lter. If vehicle is
driven in dusty/dirty conditions, inspect ®lter or
change indicator (if equipped) at every engine oil
change. See
Engine Air Cleaner/Filter on page 5-21for more information.An Emission Control Service.
(See footnote ².)
qCheck rear/front axle ¯uid level and add ¯uid as
needed. Check constant velocity joints and axle seals
for leaking.
qRotate tires. See
Tire Inspection and Rotation on
page 5-71for proper rotation pattern and additional
information.(See footnote +.)
6-6

Maintenance Schedule (cont.)
Transfer Case and Front Axle (All-Wheel
Drive) Inspection......................................6-18
Transfer Case and Front Axle (Four-Wheel
Drive) Inspection......................................6-18
Using Your................................................... 6-4
Your Vehicle and the Environment................... 6-2
Maintenance When Trailer Towing.....................4-89
Making Turns.................................................4-86
Malfunction Indicator Light................................3-49
Manual Seats................................................... 1-3
Manual Selectable Ride...................................4-12
Manual Transfer Case.....................................2-34
Manual Transmission Check.............................6-13
Manual Transmission.......................................2-22
Fluid..........................................................5-28
Operation...................................................2-29
Manual Windows............................................2-15
Matching Transmitter(s) to Your Vehicle............... 2-5
Memory Seat.................................................2-66
Message.......................................................3-65
DIC Warnings and Messages........................3-65
Mexico, Central America and Caribbean Islands/
Countries (Except Puerto Rico and U.S. Virgin
Islands) ± Customer Assistance....................... 7-4
Mirrors..........................................................2-56
Automatic Dimming Rearview with Compass
and Temperature Display...........................2-56
Automatic Dimming Rearview with OnStar
ž,
Compass and Temperature Display.............2-53Mirrors (cont.)
Manual Rearview Mirror................................2-53
Outside Automatic Dimming Mirror.................2-61
Outside Camper-Type Mirrors........................2-59
Outside Convex Mirror.................................2-62
Outside Curb View Assist Mirrors...................2-61
Outside Heated Mirrors................................2-62
Outside Manual Mirrors................................2-59
Outside Power Camper-Type.........................2-60
Outside Power Foldaway Mirrors....................2-61
Outside Power Mirrors..................................2-60
Outside West Coast-Type Mirrors...................2-59
Model Reference................................................ vi
MyGMLink.com................................................ 7-3
N
New Vehicle Break-In......................................2-20
Noise Control System, Tampering......................5-58
Normal Maintenance Replacement Parts...........5-121
O
Odometer......................................................3-35
Off-Road Recovery..........................................4-19
OIL LIFE RESET............................................3-67
OIL PRESSURE LOW.....................................3-67
11