1998 BUICK CENTURY seat adjustment

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1-15
Shoulder Belt Tightness Adjustment
Your car has a shoulder belt tightness adjustment
feature. If the shoulder belt seems too tight, adjust it
before you begin to drive.
1. Sit well back in the seat.
2. Start pulling the shoulder belt out.
3. Just before it reaches the end, give it a quick pull.4. Let the belt go back all the way. You should hear a
slight clicking sound. If you don't, the adjustment
feature won't set, and you'll have to start again.
5. Now you can add a small amount of slack. Lean
forward slightly, then sit back. If you've added more
than 1 inch (25 mm) of slack, pull the shoulder belt
out as you did before and start again.

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6-34
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.
The vehicle should be properly prepared as follows:

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 inflated.

Rock the vehicle to stabilize the suspension.The headlamp aiming devices are under the hood near
the headlamps.
Start with the horizontal aim. The adjustment screws can
be turned with an E8 Torx
 socket or T15 screwdriver.
Once the horizontal aim is adjusted, then adjust the
vertical aim.
1. Turn the horizontal aiming screw (A) until the
indicator (B) is lined up with zero.

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9-2
Brake
Adjustment 6-28 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fluid 6-26 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Master Cylinder 6-26 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parking 2-27 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pedal Travel 6-28 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replacing System Parts 6-29 . . . . . . . . . . . . . . . . . . . . . . . .
System Warning Light 2-70 . . . . . . . . . . . . . . . . . . . . . . . . .
Trailer 4-35 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Transaxle Shift Interlock Check 7-33 . . . . . . . . . . . . . . . . . .
Wear 6-28 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Brake to Shift Light 2-78 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Brakes, Anti-Lock 4-7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Braking 4-6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Braking in Emergencies 4-10 . . . . . . . . . . . . . . . . . . . . . . . . . .
Break-In, New Vehicle 2-18 . . . . . . . . . . . . . . . . . . . . . . . . . .
Brightness Control 2-43 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
BTSI Check 7-33 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Bulb Replacement 6-31 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Headlamp 6-31 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Reading Lamps 6-38 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rear Bulbs 6-35 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Canadian Roadside Assistance 8-6 . . . . . . . . . . . . . . . . . . . .
Capacities and Specifications 6-66 . . . . . . . . . . . . . . . . . . . . . .
Carbon Monoxide 2-13, 2-32, 4-29, 4-35 . . . . . . . . . . . . . . .
Cassette Deck Service 7-31 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cassette Tape Player 3-10, 3-12 . . . . . . . . . . . . . . . . . . . . . . .
Cassette Tape Player Care 3-19 . . . . . . . . . . . . . . . . . . . . . . . .
Cellular Telephone 2-58 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Center Passenger Position 1
-28 . . . . . . . . . . . . . . . . . . . . . . . .
Central Door Unlocking System 2-4 . . . . . . . . . . . . . . . . . . . .
Certification Label 4-31 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chains, Safety 4-35 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chains, Tire 6-47 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Changing a Flat Tire 5-17 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Check Oil Level Light 2-77 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Checking Your Restraint Systems 1-55 . . . . . . . . . . . . . . . . . .
Chemical Paint Spotting 6-54 . . . . . . . . . . . . . . . . . . . . . . . . . .
Child Restraints 1-39 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Securing in a Rear Outside Seat Position 1-45 . . . . . . . . . . .
Securing in the Center Rear Seat Position 1-47 . . . . . . . . . .
Securing in the Right Front Seat Position 1-49 . . . . . . . . . .
Top Strap 1-44 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Where to Put 1-43 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chrome-Plated Wheels, Cleaning 6-53 . . . . . . . . . . . . . . . . . .
Cigarette Lighter 2-57 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Circuit Breakers and Fuses 6-58 . . . . . . . . . . . . . . . . . . . . . . .
Cleaner/Filter, Air 6-15 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cleaning
Aluminum or Chrome
-Plated Wheels 6-53 . . . . . . . . . . . . .
Fabric 6-48 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Glass 6-50 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inside of Your Vehicle 6-48 . . . . . . . . . . . . . . . . . . . . . . . . .
Instrument Panel 6-50 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lamps/Lenses 6-52 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Leather 6-49 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Outside of Your Vehicle 6-51 . . . . . . . . . . . . . . . . . . . . . . . .
Speaker Covers 6-50 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Special Problems 6-49 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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9-9
Personal Choice Features 2-10 . . . . . . . . . . . . . . . . . . . . . . .
Resynchronization 2-12 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removing the Rear Seat Cushion 6-61 . . . . . . . . . . . . . . . . . .
Replacement
Bulbs 6
-66 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts 6-67 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wheel 6-45 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replacing Safety Belts 1-56 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Reporting Safety Defects 8-9 . . . . . . . . . . . . . . . . . . . . . . . . . .
Restraints
Checking 1
-55 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Child 1-39 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Head 1-7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replacing Parts After a Crash 1-56 . . . . . . . . . . . . . . . . . . .
System Check 7-32 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Retained Accessory Power 2-21 . . . . . . . . . . . . . . . . . . . . . . . .
Right Front Passenger Position 1-21 . . . . . . . . . . . . . . . . . . . .
Roadside Assistance 8-6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Roadside Assistance, Canadian 8-6 . . . . . . . . . . . . . . . . . . . . .
Rocking Your Vehicle 5-28 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rotation, Tires 6-41 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Safety Belts 1-8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Adults 1-13 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Care 6-50 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Center Passenger Position 1-28 . . . . . . . . . . . . . . . . . . . . . .
Children 1-36 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Driver Position 1-13 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Extender 1-55 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
How to Wear Properly 1-13 . . . . . . . . . . . . . . . . . . . . . . . . .
Incorrect Usage 1-16, 1-53, 1-54 . . . . . . . . . . . . . . . . . . . . Lap Belt 1
-28 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lap-Shoulder 1-13, 1-30 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Larger Children 1-52 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Passenger Position 1-21, 1-28, 1-30 . . . . . . . . . . . . . . . . . .
Questions and Answers 1-12 . . . . . . . . . . . . . . . . . . . . . . . .
Rear Comfort Guides 1-33 . . . . . . . . . . . . . . . . . . . . . . . . . .
Rear Seat Outside Passenger Positions 1-30 . . . . . . . . . . . .
Rear Seat Passengers 1-29 . . . . . . . . . . . . . . . . . . . . . . . . . .
Reminder Light 1-9, 2-68 . . . . . . . . . . . . . . . . . . . . . . . . . .
Replacing After a Crash 1-56 . . . . . . . . . . . . . . . . . . . . . . . .
Right Front Passenger Position 1-21 . . . . . . . . . . . . . . . . . .
Shoulder Belt Tightness Adjustment 1-15 . . . . . . . . . . . . . .
Smaller Children and Babies 1-36 . . . . . . . . . . . . . . . . . . . .
Use During Pregnancy 1-20 . . . . . . . . . . . . . . . . . . . . . . . . .
Why They Work 1-9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Safety Chains 4-35 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Safety Defects, Reporting 8-9 . . . . . . . . . . . . . . . . . . . . . . . . .
Safety Warnings and Symbols iii. . . . . . . . . . . . . . . . . . . . . . .
Scheduled Maintenance Services 7
-4 . . . . . . . . . . . . . . . . . . . .
Seat Cushion, Removing the Rear 6-61 . . . . . . . . . . . . . . . . . .
Seatback
Latches 1
-7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Recliner 1-5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Reclining Front 1-5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Seats
Controls 1
-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Heated 1-5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lumbar Control 1-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Memory 1-3, 1-4, 2-10 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power 1-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Restraint Systems 1-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Securing a Child Restraint 1-45, 1-47, 1-49 . . . . . . . . . . . .