2003 BUICK CENTURY service indicator

Headlamp Aiming
Your vehicle has a headlamp system equipped with
horizontal and vertical aim indicators. The aim has been
pre-set at the factory and should need no further
adjustment. This is true even though your vertical and
horizontal aim indicators may not fall exactly on the
ª0º (zero) marks on their scales.
If your vehicle is damaged in an accident, the headlamp
aim may be affected. Aim adjustment may be necessary
if it is difficult to see lane markers (for horizontal
aim), or if oncoming drivers ¯ash their high beams at
you (for vertical aim). If you believe your headlamps
need to be re-aimed, we recommend that you take it to
your dealer for service; however, it is possible for
you to re-aim your headlamps as described in the
following procedure.
Notice:To make sure your headlamps are aimed
properly, read all the instructions before beginning.
Failure to follow these instructions could cause
damage to headlamp parts.To check the aim, the vehicle should be properly
prepared as follows:
·The headlamps must be off for one hour prior to
aiming and must remain off during this procedure.
·The vehicle must have all four tires on a perfectly
level surface.
·If necessary, pads may be used on an uneven
surface.
·The vehicle should not have any snow, ice or mud
attached to it.
·The vehicle should be fully assembled and all other
work stopped while headlamp aiming is being done.
·There should not be any cargo or loading of the
vehicle, except it should have a full tank of fuel and
one person or 160 lbs (75 kg) on the driver's seat.
·Close all doors.
·Tires should be properly in¯ated.
·Rock the vehicle to stabilize the suspension.
5-49

LATCH System (cont.)
Securing a Child Restraint Designed for the
LATCH System........................................1-45
Leaving Your Vehicle With the Engine Running . . . 2-28
Leaving Your Vehicle.......................................2-12
Lighted Visor Vanity Mirrors..............................2-16
Light.............................................................3-25
Air Bag Readiness.......................................3-25
Anti-Lock Brake System Warning...................3-28
Brake System Warning.................................3-27
Change Engine Oil......................................3-35
Charging System.........................................3-26
Cruise Control.............................................3-36
Door/Trunk Ajar Warning...............................3-36
Engine Coolant Temperature Warning.............3-29
Enhanced Traction System (ETS) Warning
Light......................................................3-28
Low Fuel Warning.......................................3-38
Low Oil Level.............................................3-35
Low Traction...............................................3-29
Low Washer Fluid Warning...........................3-36
Malfunction Indicator....................................3-31
Oil Pressure...............................................3-34
Safety Belt Reminder...................................3-24
Security.....................................................3-36
Service Vehicle Soon...................................3-37
Tire Pressure..............................................3-30
Loading Your Vehicle.......................................4-33
Lockout Protection..........................................2-12
Locks............................................................2-10Door..........................................................2-10
Leaving Your Vehicle....................................2-12
Lockout Protection.......................................2-12
Power Door................................................2-11
Programmable Automatic Door Locks.............2-11
Loss of Control...............................................4-15
Low Fuel Warning Light...................................3-38
Low Traction Light..........................................3-29
Low Washer Fluid Warning Light.......................3-36
M
Maintenance, Normal Replacement Parts............5-95
Maintenance Schedule.....................................6-10
At Each Fuel Fill.........................................6-10
At Least Once a Month................................6-10
At Least Once a Year..................................6-11
At Least Twice a Year..................................6-11
Brake System Inspection..............................6-15
Engine Cooling System Inspection.................6-14
Exhaust System Inspection...........................6-14
Fuel System Inspection................................6-14
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.............6-10
Part C - Periodic MaintenanceInspections......6-14
Part D - Recommended Fluids and Lubricants . . . 6-16
8

Maintenance Schedule (cont.)
Part E - Maintenance Record........................6-17
Scheduled Maintenance................................. 6-5
Steering, Suspension and Front Drive Axle
Boot and Seal Inspection..........................6-14
Throttle System Inspection............................6-15
Using Your................................................... 6-4
Your Vehicle and the Environment................... 6-2
Maintenance When Trailer Towing.....................4-41
Making Turns.................................................4-39
Malfunction Indicator Light................................3-31
Manual Operation...........................................3-17
Manual Seats................................................... 1-2
Matching Transmitter(s) to Your Vehicle............... 2-8
Mexico, Central America and Caribbean Islands/
Countries (Except Puerto Rico and U.S. Virgin
Islands) ± Customer Assistance........................ 7-5
Mirrors..........................................................2-32
Manual Rearview Mirror with OnStar
ž.............2-32
Manual Rearview Mirror................................2-32
Outside Convex Mirror.................................2-33
Outside Power Mirrors..................................2-33
MyGMLink.com................................................ 7-4
N
New Vehicle Break-In......................................2-19
Normal Maintenance Replacement Parts............5-95
O
Odometer......................................................3-24
Off-Road Recovery..........................................4-13
Oil ................................................................3-35
Change Engine Oil Light...............................3-35
Engine.......................................................5-13
Low Oil Level Light......................................3-35
Pressure Light.............................................3-34
Older Children, Restraints................................1-30
Online Owner Center........................................ 7-4
OnStar
žPersonal Calling.................................2-35
OnStaržServices............................................2-34
OnStaržSystem.............................................2-34
OnStaržVirtual Advisor....................................2-35
Operation Tips................................................3-20
9

V
Vehicle Identi®cation........................................5-87
Number (VIN).............................................5-87
Service Parts Identi®cation Label...................5-87
Vehicle Storage..............................................5-42
Vehicle............................................................ 4-6
Control........................................................ 4-6
Damage Warnings........................................... iv
Loading......................................................4-33
Service Soon Light......................................3-37
Symbols......................................................... iv
Ventilation Adjustment......................................3-20
Visor Vanity Mirror..........................................2-16
Visors...........................................................2-16
W
Warning Lights, Gages and Indicators................3-22
Warnings......................................................... 3-3
Hazard Warning Flashers............................... 3-3
Other Warning Devices.................................. 3-4
Safety and Symbols......................................... iii
Vehicle Damage.............................................. iv
Washer Fluid, Low Warning Light......................3-36
Washing Your Vehicle......................................5-82
Weatherstrip Lubrication...................................6-11
Weight of the Trailer Tongue.............................4-37
Weight of the Trailer........................................4-36
What Kind of Engine Oil to Use........................5-15
What to Do with Used Oil................................5-17
15