1999 BUICK CENTURY AUX

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GENERAL MOTORS, GM, the GM Emblem, BUICK,
the BUICK Emblem and the name CENTURY are
registered trademarks of General Motors Corporation.
This manual includes the latest information at the time it
was printed. We reserve the right to make changes in the
product after that time without further notice. For
vehicles first sold in Canada, substitute the name
ªGeneral Motors of Canada Limitedº for Buick Motor
Division whenever it appears in this manual.
Please keep this manual in your vehicle, so it will be
there if you ever need it when you're on the road. If you
sell the vehicle, please leave this manual in it so the new
owner can use it.
We support voluntary
technician certification.
For Canadian Owners Who Prefer a
French Language Manual:
Aux propri‡taires canadiens: Vous pouvez vous
procurer un exemplaire de ce guide en fran†ais chez
votre concessionaire ou au:
DGN Marketing Services Ltd.
1577 Meyerside Dr.
Mississauga, Ontario L5T 1B9
Litho in U.S.A.

Copyright General Motors Corporation 1998
Part No. 10416926 A First Edition All Rights Reserved

2-
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2-1
Section 2 Features and Controls
Here you can learn about the many standard and optional features on your vehicle, and information on starting,
shifting and braking. Also explained are the instrument panel and the warning systems that tell you if everything is
working properly
-- and what to do if you have a problem.
2
-2 Keys
2
-4 Door Locks
2
-7 Remote Keyless Entry
2
-14 Trunk
2
-14 Theft
2
-15 PASS-Key
II
2
-16 New Vehicle ªBreak-Inº
2
-17 Ignition Positions
2
-18 Starting Your V6 Engine
2
-19 Engine Coolant Heater (If Equipped)
2
-20 Automatic Transaxle Operation
2
-25 Parking Brake
2
-26 Shifting Into PARK (P)
2
-28 Shifting Out of PARK (P)
2
-29 Parking Over Things That Burn
2
-30 Engine Exhaust
2
-30 Running Your Engine While You're Parked2
-31 Windows
2
-32 Horn
2
-32 TILT-WHEEL Adjustable Steering Column
2
-33 Turn Signal/Multifunction Lever
2
-38 Exterior Lamps
2
-40 Interior Lamps
2
-42 Mirrors
2
-44 Storage Compartments
2
-46 Sun Visors
2
-46 Auxiliary Power Connection (Power Drop)
2
-46 Astroroof (If Equipped)
2
-47 OnStar
(Option)
2
-48 The Instrument Panel -- Your
Information System
2
-49 Instrument Panel Cluster
2
-50 Warning Lights, Gages and Indicators

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2-46
Sun Visors
To block out glare, you can swing down the visors. You
can also move them from side to side. The visors also
have extenders that you can pull out for added coverage.
Visor Vanity Mirrors
Open the cover to expose the vanity mirror.
If your vehicle has the optional lighted vanity mirrors,
the lamps come on when you open the cover.
Auxiliary Power Connection
(Power Drop)
Your vehicle is equipped
with an auxiliary
power connection.This feature provides power, ground and accessory
wires which can be accessed to add aftermarket
electrical equipment to your vehicle. It is located on the
passenger's side of the vehicle, under the glove box, and
is labeled with a wire function and fuse rating. For
information on accessing the connection and electrical
hookup, please refer to your service manual. To order a
service manual, see ªService Publications, Orderingº in
the Index.
NOTICE:
Adding some electrical equipment to your vehicle
can damage it or keep other things from working
as they should. This wouldn't be covered by your
warranty. Check with your dealer before adding
electrical equipment, and never use anything that
exceeds the fuse rating.
Astroroof (If Equipped)
Your vehicle may be equipped with an express-open
astroroof. It includes a sliding glass panel and a
one
-piece sunshade. The control switch works only
when the ignition or Retained Accessory Power is on.

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6-60
Circuit
BreakerDescription
A Tire Inflation Monitor Reset Button
B Power Windows/Sunroof
C Rear Defog
D Power SeatsFuse Description
1 Not Used
4 Ignition Signal
-- Hot in Run and
Start
-- PCM, BCM U/H Relay
5 Remote Radio Premium Sound
6 Power Mirrors
8 Panel Dimming
10 Ignition Signal
-- Hot in Run, Unlock and
Start
-- Cluster, Powertrain Control
Module, Body Control Module
13 DRL Module
14 Interior Lamps
15 Door Locks
17 Taillamps, License Lamp
18 Radio
19 Heated Mirror
20 Cruise Control
22 Clusters
23 Cigarette Lighter
-- Auxiliary Power
Connection (Power Drop), Data Link

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6-61
Fuse Description
24 Stoplamps
26 Parking Lamps
27 Auxiliary Power Connection
(Power Drop)
-- Hot in ACC and Run
28 Crank Signal
-- Body Control Module,
Cluster, Powertrain Control Modules
29 Ignition Signal
-- HVAC Control Head
30 Brake Transmission Shift Interlock (BTSI)
31 Air Bag
32 Body Control Module
33 Hazard Flashers
34 Not UsedFuse Description
36 Ignition Signal
-- Hot in ACC and
Run
-- Body Control Module
38 Low Blower
39 Anti
-Lock Brakes
40 Turn Signals
41 Radio, HVAC Head, Remote Keyless
Entry, Cluster
42 High Blower
43 Not Used
44 Audio Steering Wheel Controls
45 Wipers

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6-62
Underhood Electrical Center -- Passenger's Side
Some fuses and relays are located in the underhood
electrical center on the passenger's side of the
engine compartment.Fuse Description
1 ABS
2 Starter Solenoid
3 Power Seats, Rear Defog
4 High Blower, Hazard Flasher,
Stoplamps, Power Mirror, Door Locks
5 Ignition Switch, BTSI, Stoplamps,
ABS, Turn Signals, Cluster, Air Bag,
DRL Module
6 Cooling Fan
7 Interior Lamps, Retained Accessory
Power, Keyless Entry, Data Link, HVAC
Head, Cluster, Radio, AUX Power
(Power Drop), Cigarette Lighter
8 Ignition Switch, Wipers, Radio, Steering
Wheel Controls, Body Control Module,
AUX Power (Power Drop), Power
Windows, Sunroof, HVAC Controls,
DRL, Rear Defog Relay

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Automatic Dimming/Heated Outside
Rearview Mirror 2-44 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Auxiliary Power Connection 2-46 . . . . . . . . . . . . . . . . . . . . . .
Back-up Lamp Bulb Replacement 6-38 . . . . . . . . . . . . . . . . .
Battery 6-30 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Jump Starting 5-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replacement, Remote Keyless Entry 2-12 . . . . . . . . . . . . . .
Rundown Protection 2-42 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Warnings 5-3, 5-5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
BBB Auto Line 8-3, 8-4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Better Business Bureau Mediation 8-3, 8-4 . . . . . . . . . . . . . . .
Blizzard 4-27 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Brake
Adjustment 6
-29 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
BTSI 2-21, 2-28 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fluid 6-27 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Master Cylinder 6-27 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parking 2-25 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pedal Travel 6-29 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replacing System Parts 6-30 . . . . . . . . . . . . . . . . . . . . . . . .
System Warning Light 2-52 . . . . . . . . . . . . . . . . . . . . . . . . .
Trailer 4-35 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Transaxle Shift Interlock 2-21, 2-28 . . . . . . . . . . . . . . . . . .
Transaxle Shift Interlock (BTSI) Check 7-16 . . . . . . . . . . .
Wear 6-29 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Brakes, Anti-Lock 4-7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Braking 4-6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Braking in Emergencies 4-10 . . . . . . . . . . . . . . . . . . . . . . . . . . BTSI 2
-21, 2-28 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
BTSI Check 7-16 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Bulb Replacement 6-31 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Canadian Roadside Assistance 8-6 . . . . . . . . . . . . . . . . . . . .
Capacities and Specifications 6-64 . . . . . . . . . . . . . . . . . . . . . .
Carbon Monoxide 2-14, 2-30, 4-27, 4-34 . . . . . . . . . . . . . . .
Cassette
Deck Service 7
-14 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tape Player 3-15, 3-19, 3-23 . . . . . . . . . . . . . . . . . . . . . . . .
Tape Player Care 3-31 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tape Player Errors 3-16, 3-20, 3-24 . . . . . . . . . . . . . . . . . .
Center High-Mounted Stoplamp Bulb Replacement 6-35 . . . .
Center Passenger Position 1-26 . . . . . . . . . . . . . . . . . . . . . . . .
Certification Label 4-30 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chains, Safety 4-35 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chains, Tire 6-49 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Change Oil Soon Light 2-62 . . . . . . . . . . . . . . . . . . . . . . . . . .
Changing a Flat Tire 5-21 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Charging System Light 2-52 . . . . . . . . . . . . . . . . . . . . . . . . . .
Checking Your Restraint Systems 1-53 . . . . . . . . . . . . . . . . . .
Chemical Paint Spotting 6-56 . . . . . . . . . . . . . . . . . . . . . . . . . .
Child Restraints 1-37 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Securing in a Rear Outside Seat Position 1-43 . . . . . . . . . . .
Securing in the Center Rear Seat Position 1-45 . . . . . . . . . .
Securing in the Right Front Seat Position 1-47 . . . . . . . . . .
Top Strap 1-42 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Where to Put 1-41 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cigarette Lighter 2-45 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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Owner Checks and Services 7-14 . . . . . . . . . . . . . . . . . . . . . . .
Owner Publications, Ordering 8-11, 8-12 . . . . . . . . . . . . . . . .
Paint Spotting, Chemical 6-56 . . . . . . . . . . . . . . . . . . . . . . . .
Park
Automatic Transaxle 2
-21 . . . . . . . . . . . . . . . . . . . . . . . . . .
Shifting Into 2-26 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Shifting Out of 2-28 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parking
At Night 2
-15 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Brake 2-25 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Brake Mechanism Check 7-17 . . . . . . . . . . . . . . . . . . . . . . .
Lots 2-15 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Over Things That Burn 2-29 . . . . . . . . . . . . . . . . . . . . . . . .
With a Trailer 4-37 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Passenger Compartment Air Filter 6-17 . . . . . . . . . . . . . . . . . .
Passing 4-13 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PASS-Key
II 2-15 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Periodic Maintenance Inspections 7-18 . . . . . . . . . . . . . . . . . .
Power
Auxiliary Connection 2
-46 . . . . . . . . . . . . . . . . . . . . . . . . . .
Door Locks 2-5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Option Fuses 6-59 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Outside Mirrors 2-43 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Retained Accessory 2-42 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Seat (Six-Way) 1-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Steering 4-10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Steering Fluid 6-24 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Windows 2-31 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pregnancy, Use of Safety Belts 1-18 . . . . . . . . . . . . . . . . . . . . Problems on the Road 5
-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Publications, Service and Owner 8-11, 8-12 . . . . . . . . . . . . . .
Publications, Service and Owner,
Ordering in Canada 8
-11 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Radiator, Adding Coolant 5-17 . . . . . . . . . . . . . . . . . . . . . . .
Radiator Pressure Cap 6-21 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Radio Reception 3-30 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Radios 3-12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rain, Driving In 4-17 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rainy Weather Tips 4-19 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Reading Lamps, Rearview Mirror 2-42 . . . . . . . . . . . . . . . . . .
Rear
Door Child Security Locks 2
-6 . . . . . . . . . . . . . . . . . . . . . .
Outside Seat Position 1-28 . . . . . . . . . . . . . . . . . . . . . . . . . .
Safety Belt Comfort Guides 1-31 . . . . . . . . . . . . . . . . . . . . .
Seat Passengers 1-27 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Window Defogger 3-9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rear Storage Armrest 2-44 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rearview Mirror 2-42, 2-43 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrochromic Day/Night 2-43 . . . . . . . . . . . . . . . . . . . . . .
Reading Lamps 2-42 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Reclining Front Seatbacks 1-3 . . . . . . . . . . . . . . . . . . . . . . . . .
Recovery Tank, Coolant 5-14 . . . . . . . . . . . . . . . . . . . . . . . . . .
Recreational Vehicle Towing 4-29 . . . . . . . . . . . . . . . . . . . . . .
Refrigerants, Air Conditioning 6-65 . . . . . . . . . . . . . . . . . . . .
Remote
Activation Illumination 2
-11 . . . . . . . . . . . . . . . . . . . . . . . .
Keyless Entry 2-7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Keyless Entry Operation 2-9 . . . . . . . . . . . . . . . . . . . . . . . .
Keyless Entry Resynchronization 2-13 . . . . . . . . . . . . . . . .