1993 BUICK CENTURY service

, Performing maintenance work on a vehicle can
be dangerous.
In trying to do some jobs, you
~ can be seriously injured. Do your own
maintenance work only
if you have the
~ required know-how and the proper tools and
~ equipment for the job. If you have any doubt, I
have a qualified technician do the work.
If you.are skilled enough to do some work on your
vehicle, you will probably want to get the service
information GM publishes.
You will find a list of
publications and how
to get them in this manual. See
“Service Publications” in the Index. “Section
D: Recommended Fluids and Lubricants” lists
some products GM recommends to help keep your
vehicle properly maintained. These products, or their
I equivalents, should be used whether you do the work
yourself or have it done.
“Section
E: Maintenance Record” provides a place for
I ‘you to record the maintenance performed on your
vehicle. Whenever any maintenance is performed, be sure to write it down in this section. This will help
YOU
determine when your next maintenance should be done.
In addition, it is a
good idea to keep your maintenance .
receipts. They may be needed to qualify your vehicle for
warranty repairs.
“Section
B: Owner Checks and Services” tells you what
should be checked whenever you stop for fuel. It
also
explains what you can easily do to help keep your vehicle
in good condition.
“Section
C: Periodic Maintenance Inspections” explains
iniportant inspections that your Buick dealer’s service
department or another qualified service center should
perform.
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Section A: Scheduled Maintenance Services
Using Your Maintenance Schedules These schedules are for vehicles that:
This section tells you the maintenance services
you carry passengers and cargo within recommended limits.
should have done and when you should schedule them. You will
find these limits on your vehicle’s Tire-
Your Buick dealer knows your vehicle best and wants you Loading Informatio\
n label. See “Loading Your
to be happy with it. If you go to your dealer for your Vehicle’’ in the Index.
service
needs, you’ll know that GM-trained and ~
supported service people will perform the work using
genuine
GM parts.
are driven on reasonable road surfhces within legal
use the recommended unleaded fuel. See “Fuel” in the
driving limits.
Index.
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Schedule I
Follow Schedule I if your vehicle is
MAINLY driven under one or more
of the following conditions:
When most trips are less than 4 miles
When most trips are less than
10 miles (16 km) and outside
temperatures remain below freezing.
When most trips include extended
idling and/or frequent low-speed
operation, as
in stop-and-go’ traffic.
(6 km).
When towing a trailer.
When operating in dusty areas.
Schedule I should also be followed if
the vehicle
is used for delivery
service, p?lice,
taxi or other
commercial applications.
* An Emission Control Service.
z2T The U.S. Environmental Protection Agency
has.determined that the failure to perform this
maintenance item will not nullify the emission
wamty
or limit recall liability prior to the
completion of vehicle useful life. General
Motors, however, urges that all recommended
maintenance services
be performed at the
indicated intervals and the maintenance be
recorded in “Section E: Maintenance Record.”
ITEM
NO.
TO BE SERVICED WHEN TO PERFORM
See “Explanation of Scheduled Maintenance Miles (kilometers) or Months
Services” following Schedules
I and D[. (whichever occurs first).
2 I Chassis Lubrication I Every other oil change.
Tire
and Wheel Rotation and Inspection At 6,000 Miles (10 000 km) and every 15,000
Miles (25 000 km) or as necessary. I
61
Cooling System Service* Every 30,000 Miles (50 O00 km) or 24
Months. I
8 I Spark
Plug Replacement* I Every 30,000 Miles (50 000 km). I
EGR System Inspection** Every 30,000 miles (50 OOO km)
(2.2L LA Code 4 engine only)
12 I Fuel Tank, Cap and Lines Inspection** I Every 30,000 Miles (50 OOO km). I
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The services shown in this schedule up to 48,OOO miles (SO 000 km) are to be
performed after 48,000 miles at the same intervals.
MILES (000)
3 16 19 I12 115 I18 121 124 I27 130 133 136 139 142 145 148 ~
KILOMETERS (000)
I I I I I I I I I I I 1 I I 0
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Schedule 11
Follow Schedule II ONLY if none of
the driving conditions specified in Schedule
I apply.
*An Emission Control Service.
I% The U.S. Environmental Protection Agency
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 vehicle useful life.
General
Motors, however, urges that all
recommended maintenance services be
performed at the indicated intervals
and the
maintenance be recorded in “Section E:
Maintenance Record.”
TO BE SERVICED ITEM
No’ See “Explanation of Scheduled Maintenance
Services” following Schedules
I and II.
WHEN TO PERFORM
Miles (kilometers) or Months
(whichever
occurs first).
4l
Tire and Wheel Rotation and Inspection
Cooling
System Service* Every 30,000 Miles (50 OOO km) or 24
Every 30,000 Miles (50 000 km).
lo I
Every 30,000 Miles (50 OOO km)
12 I Fuel Tank, Cap and Lines Inspection** I Every 30,000 Miles (50 000 km).
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The services shown in this schedule up to 45,000 miles (75 000 km) are to be
performed after 45,000 miles at the same intervals.
MILES (000)
7.5 15 I 22.5 1 30 I 37.5 I 45
KILOMETERS (000)
12.5 I 25 I 37.5 I 50 1. 62.5 I 75
I 0 I 0 I 0 I 0 I 0 I 0 I
0
I I
0
I I I I I I I 0
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Explanation of Scheduled Maintenance Services
Below are explanations of the services listed in Schedule
I and Schedule II.
The proper fluids and lubricants to use are listed in
Section
D. Make sure whoever services your vehicle uses
ITEM
NO. SERVICE
1 Engine Oil and Filter Change-Always use
SG Energy Conserving 11 oils of proper viscosity.
The “SG” designation may be shown alone or in
combination with others, such as ‘‘SG/CC:’
“SG/CD” or “SF, SG, CC:’ etc.
To determine the preferred viscosity for your
vehicle’s engine (e.g., SAE
5W-30 or SAE
10W-30), see “Engine Oil” in the Index.
2 Chassis Lubrication-Lubricate the transaxle
shift linkage, parking brake cable guides,
underbody contact points and linkage. If your
vehicle is equipped with grease fittings, lubricate
the suspension and steering linkage. these. All parts should be replaced and all necessary
repairs done before you or anyone else drives the vehicle.
NOTE: To determine your engine’s displacement and
code, see “Engine Identification” in the Index.
ITEM
NO. SERVICE
3 Throttle Body Mounting Bolt Torque (3300 V6
Code N Engine Only)*-Check the,torque of
the mounting bolts and/or nuts.
4 Tire and Wheel Rotation and Inspection-For
proper wear and maximum tire life, rotate your
tires following the instructions
in this manual.
See “Tires, Inspection & Rotation” in the Index.
Check the tires for uneven wear or damage. If
you see irregular or premature wear, check the
wheel alignment. Check for damaged wheels also.’
*An Emission Control Service.
~2 The U.S. Environmental Protection Agency 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 vehicle useful life. General Motors, however, urges that all recommended maintenance services be
performed at the indicated intervals and the maintenance be recorded in “Section E: Maintenance Record.”
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ITEM
NO. SERVICE
5 Engine Accessory Drive Belt Inspection-
* Inspect the belt for cracks, fraying, wear and
proper tension. Replace as needed.
6 Cooling System Service*-Drain, flush and
refill the system with new or approved recycled
coolant conforming to
GM Specification 1825M.
Keep coolant at the proper mixture as specified. See “Engine Coolant” in the Index. This
provides proper freeze protection, corrosion inhibitor level and engine operating temperature.
Inspect hoses and replace if they are cracked,
swollen or deteriorated. Tighten screw-type hose
clamps. Clean the outside of the radiator and air
conditioning condenser. Wash the pressure cap
and neck.
To help ensure proper operation, we recommend
a pressure test of
both the cooling system and the
pressure cap.
ITEM
NO. SERVICE
7 Transaxle Service-Change both the fluid and
filter every
l5,O00 miles (25 O00 km) if the
vehicle is mainly driven under one or more of
these conditions:
In heavy city traffic where the outside tem-
perature regularly reaches
90°F (32OC) or
higher.
In hilly or mountainous terrain.
When doing frequent trailer towing.
Uses such as found in taxi, police car or
If you do’not use your vehicle under any of
these conditions, change both the fluid and filter every
100,000 miles (160 0o0 km).
plugs with the proper type. See “Specifications
‘and Capacities” in the Index. delivery service.
8 Spark
Plug Replacement*-Replace spark
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