1999 BUICK RIVIERA engine

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6-60
Fuse Usage
18 Not Used
19 Radio
20 Cooling Fan
21 Not Used
22 Not Used
23 Windshield Wipers
24 Flat Pack Motor
25 PCM
26 Cigarette Lighter
27 Crank
28 HVAC BlowerEngine Compartment Fuse Block

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6-66
Replacement Bulbs
Exterior Bulb Number. . . . . . . . . . . . . . . . . . . . . . . .
Headlamp
High
-Beam 9005. . . . . . . . . . . . . . . . . . . . . . . . . . .
Low
-Beam 9006. . . . . . . . . . . . . . . . . . . . . . . . . . .
Parking/Turn 3057. . . . . . . . . . . . . . . . . . . . . . . . . . .
Back
-Up 3057. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tail 194. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tail/Turn 3057. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Interior
Rail Courtesy, Reading PC168. . . . . . . . . . . . . . . . . .
Front Overhead Reading PC168. . . . . . . . . . . . . . . . .
For service information on other bulbs, contact your
dealer's service department.
Capacities and Specifications
The following approximate capacities are given in
English and metric conversions. Please refer to
ªRecommended Fluids and Lubricantsº in the Index for
more information.Engine Code 1 (L67) 3.8L V6 SFI
Automatic Transaxle
Drain and Refill 7.4 quarts (7.0 L). . . . . . . . . . . . . .
After Complete Overhaul 10.0 quarts (9.5 L). . . . .
After performing either transaxle procedure, check
fluid level when done. More fluid may be needed.
Belt Tensions
Automatically controlled by a Self
-Tension idler
pulley. Tension adjustment should never be necessary.
Cooling System13.0 quarts (12.3 L) . . . . . . . . . . . . .
Engine Crankcase
Oil change with filter change 4.5 quarts (4.3 L). . . . .
Fuel Tank18.5 gallons (70.0 L) . . . . . . . . . . . . . . . . .
Wheel Nut Torque100 lb
-ft (140 N´m) . . . . . . . . . .
Tire Pressure
See Tire
-Loading Information label on the rear edge
of the driver's door.
R
-134a Air Conditioning
See refrigerant charge label under the hood.
All capacities are approximate. When adding, be sure
to fill to the appropriate level as recommended in
this manual.

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6-67 Engine Specifications
Engine L67. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
VIN Engine Code 1. . . . . . . . . . . . . . . . . . . . . . . . . . .
Type V6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Displacement 3.8L. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Horsepower 240. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Firing Order 1
-6-5-4-3-2 . . . . . . . . . . . . . . . . . . . . . .
Thermostat Temperature 195
F (91
C) . . . . . . . . . . .
Air Conditioning Refrigerants
Not all air conditioning refrigerants are the same. If the
air conditioning system in your vehicle needs
refrigerant, be sure the proper refrigerant is used. If
you're not sure, ask your dealer.
Normal Maintenance
Replacement Parts
Air Cleaner Filter AC Type A-1096C . . . . . . . . . . . . .
Engine Oil Filter AC Type PF
-47 . . . . . . . . . . . . . . . .
Fuel Filter AC Type GF
-627 . . . . . . . . . . . . . . . . . . . .
Radiator Cap RC27. . . . . . . . . . . . . . . . . . . . . . . . . . .
Spark Plugs AC Type 41
-921* . . . . . . . . . . . . . . . . . .
Gap 0.060 inch (1.52 mm)
*Replaces original spark plug NGK Type PTR4B
-15.
Windshield Wiper Blades
Type 6.32 pin. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Length 22 inches (56 cm). . . . . . . . . . . . . . . . . . . . .
Vehicle Dimensions
Length 207.2 inches (526.3 cm). . . . . . . . . . . . . . . . .
Width 75.0 inches (190.5 cm). . . . . . . . . . . . . . . . . . .
Height 55.2 inches (140.0 cm). . . . . . . . . . . . . . . . . . .
Wheelbase 113.8 inches (289.1 cm). . . . . . . . . . . . . .
Front Tread 62.5 inches (158.8 cm). . . . . . . . . . . . . . .
Rear Tread 62.6 inches (159.0 cm). . . . . . . . . . . . . . .

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6-68 Supercharged Engine Accessory Belt (L67)
The Supercharged 3800 V6 engine uses two accessory
drive belts. One belt drives the generator, power steering
pump, coolant pump and air conditioning compressor.
The second belt drives the supercharger. Each belt has
its own tensioner and idler pulley.
1. Front Belt
2. Back Belt
A. Generator
B. Power Steering
C. Crank
D. Supercharger
E. Coolant Pump
F. Air Conditioning

Scheduled Maintenance
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7-5
Short Trip/City Definition
Follow the Short Trip/City Scheduled Maintenance if
any one of these conditions is true for your vehicle:

Most trips are less than 5 to 10 miles (8 to 16 km).
This is particularly important when outside
temperatures are below freezing.

Most trips include extensive idling (such as frequent
driving in stop
-and-go traffic).

Most trips are through dusty areas.

You frequently tow a trailer or use a carrier on top of
your vehicle.

If the vehicle is used for delivery service, police, taxi
or other commercial application.
One of the reasons you should follow this schedule
if you operate your vehicle under any of these
conditions is that these conditions cause engine
oil to break down sooner.
Short Trip/City Intervals
Every 3,000 Miles (5 000 km): Engine Oil and Filter
Change (or 3 months, whichever occurs first).
Every 6,000 Miles (10 000 km): Chassis Lubrication
(or 6 months, whichever occurs first). Tire Rotation.
Every 15,000 Miles (25 000 km): Air Cleaner Filter
Inspection, if driving in dusty conditions.
Every 30,000 Miles (50 000 km): Air Cleaner Filter
Replacement. Fuel Tank, Cap and Lines Inspection.
Supercharger Oil Check (or every 36 months,
whichever occurs first) (3800 Code 1 V6 engine only).
Every 50,000 Miles (83 000 km): Automatic Transaxle
Service (severe conditions only).
Every 60,000 Miles (100 000 km): Engine Accessory
Drive Belt Inspection.
Every 100,000 Miles (166 000 km): Spark Plug Wire
Inspection. Spark Plug Replacement. Automatic
Transaxle Service (normal conditions).
Every 150,000 Miles (240 000 km): Cooling System
Service (or every 60 months, whichever occurs first).
These intervals only summarize maintenance services.
Be sure to follow the complete scheduled maintenance
on the following pages.

Scheduled Maintenance
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7-6
Long Trip/Highway Definition
Follow this scheduled maintenance only if none of the
conditions from the Short Trip/City Scheduled
Maintenance is true. Do not use this schedule if the
vehicle is used for trailer towing, driven in a dusty area
or used off paved roads. Use the Short Trip/City
schedule for these conditions.
Driving a vehicle with a fully warmed engine under
highway conditions causes engine oil to break
down slower.
Long Trip/Highway Intervals
Every 7,500 Miles (12 500 km): Engine Oil and Filter
Change (or every 12 months, whichever occurs first).
Chassis Lubrication (or every 12 months, whichever
occurs first). Tire Rotation.
Every 30,000 Miles (50 000 km): Supercharger Oil
Check (or every 36 months, whichever occurs first)
(3800 Code 1 V6 engine only). Air Cleaner Filter
Replacement. Fuel Tank, Cap and Lines Inspection.
Every 50,000 Miles (83 000 km): Automatic Transaxle
Service (severe conditions only).
Every 60,000 Miles (100 000 km): Engine Accessory
Drive Belt Inspection.
Every 100,000 Miles (166 000 km): Spark Plug Wire
Inspection. Spark Plug Replacement. Automatic
Transaxle Service (normal conditions).
Every 150,000 Miles (240 000 km): Cooling System
Service (or every 60 months, whichever occurs first).
These intervals only summarize maintenance services.
Be sure to follow the complete scheduled maintenance
on the following pages.

Short Trip/City Scheduled Maintenance
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7-8
3,000 Miles (5 000 km)

Change engine oil and filter (or every 3 months, whichever occurs first).
An Emission Control Service.
6,000 Miles (10 000 km)

Change engine oil and filter (or every 3 months, whichever occurs first).
An Emission Control Service.

Lubricate chassis components (or every 6 months, whichever occurs first).
(See footnote #.)

Rotate tires. See ªTire Inspection and Rotationº in the Index for proper
rotation pattern and additional information. (See footnote +.)
9,000 Miles (15 000 km)

Change engine oil and filter (or every 3 months, whichever occurs first).
An Emission Control Service.
12,000 Miles (20 000 km)

Change engine oil and filter (or every 3 months, whichever occurs first).
An Emission Control Service.
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Short Trip/City Scheduled Maintenance
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7-9

Lubricate chassis components (or every 6 months, whichever occurs first).
(See footnote #.)

Rotate tires. See ªTire Inspection and Rotationº in the Index for proper
rotation pattern and additional information. (See footnote +.)
15,000 Miles (25 000 km)

Change engine oil and filter (or every 3 months, whichever occurs first).
An Emission Control Service.

Inspect air cleaner filter if you are driving in dusty conditions.
Replace filter if necessary.
An Emission Control Service. (See footnote
.)
18,000 Miles (30 000 km)
Change engine oil and filter (or every 3 months, whichever occurs first).
An Emission Control Service.
Lubricate chassis components (or every 6 months, whichever occurs first).
(See footnote #.)
Rotate tires. See ªTire Inspection and Rotationº in the Index for proper
rotation pattern and additional information. (See footnote +.)
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