1984 Buick LeSabre
US · Large Cars
The 1984 Buick LeSabre is listed in the US market. Every figure below carries the source it came from, and anything our sources do not publish is left out rather than estimated.
- Engine
- Varies by configuration: 3.8L 6-cylinder (GM-BUICK), 3.8L 6-cylinder (GM-BUICK) CA model), 4.1L 6-cylinder (FFS) CA model), 4.1L 6-cylinder (FFS), 5.0L 8-cylinder (GM-OLDS) CA model), 5.0L 8-cylinder (GM-OLDS), 5.7L 8-cylinder (350 V8) (DIESEL)
- Transmission
- Automatic
- Fuel
- Varies by configuration: Gasoline, Diesel
- Economy
- 16 mpg (14.7 L/100 km) to 21 mpg (11.2 L/100 km) combined
Key Figures
Engine
| Specification | Value | Source |
|---|---|---|
| Engine | Varies by configuration: 3.8L 6-cylinder (GM-BUICK), 3.8L 6-cylinder (GM-BUICK) CA model), 4.1L 6-cylinder (FFS) CA model), 4.1L 6-cylinder (FFS), 5.0L 8-cylinder (GM-OLDS) CA model), 5.0L 8-cylinder (GM-OLDS), 5.7L 8-cylinder (350 V8) (DIESEL) | |
| Displacement | 3.8 L to 5.7 L | |
| Cylinders | 6 to 8 | |
| Fuel type | Varies by configuration: Gasoline, Diesel | EPA fueleconomy.gov |
Transmission and drivetrain
| Specification | Value | Source |
|---|---|---|
| Transmission | Automatic | EPA fueleconomy.gov |
| Gears | 3 to 4 |
Fuel economy and range
| Specification | Value | Source |
|---|---|---|
| Combined | 16 mpg (14.7 L/100 km) to 21 mpg (11.2 L/100 km) | EPA fueleconomy.gov |
| City | 14 mpg (16.8 L/100 km) to 18 mpg (13.1 L/100 km) | |
| Highway | 19 mpg (12.4 L/100 km) to 26 mpg (9.0 L/100 km) |
Our sources do not publish these for this vehicle: Aspiration, Power, Torque, Drivetrain, Electric range, Battery capacity. We leave them out instead of estimating.
Trims and configurations
9 configurations listed by our sources. Engines, drivetrains and fuel economy can differ between them.
Recalls
NHTSA lists 2 recall campaigns for this model year. Last checked November 9, 2026.
89V102000: VEHICLE SPEED CONTROL
A SMALL NYLON BUSHING IN THE CRUISE CONTROL SERVO BAIL MAY SLIP OUT OF PLACE, CAUSING INTERMITTENT AND UNEXPECTED INCREASES IN ENGINE SPEED OR DIESELING (ENGINE RUN ON WITH IGNITION OFF).
Remedy: INSTALL A NEW BUSHING IN CRUISE CONTROL SERVO BAIL.
Reported June 16, 1989. View on NHTSA
84V103000: FUEL SYSTEM, GASOLINE:DELIVERY:HOSES, LINES/PIPING, AND FITTINGS
RUBBER FUEL HOSE COULD ALLOW A SLOW FUEL LEAK WHILE THE ENGINE IS RUNNING.
Remedy: DEALER WILL REPLACE RUBBER FUEL HOSE.
Reported September 5, 1984. View on NHTSA
Data sources
- EPA fueleconomy.gov · retrieved October 24, 2026 · US Government public data
- NHTSA vPIC · retrieved October 24, 2026 · US Government public data
Source checked: October 24, 2026
Data verified: October 25, 2026
Specifications can vary by market, trim, configuration and production date. Confirm with the manufacturer before buying parts or making safety decisions. Report an error.
Related vehicles
- 1985 Buick LeSabre
Varies by configuration: Gasoline, Diesel
Varies by configuration: 3.8L 6-cylinder ((FFS) CA model), 5.0L 8-cylinder ((GM-OLDS) (FFS) CA model), 3.8L 6-cylinder ((FFS)), 5.0L 8-cylinder ((GM-OLDS) (FFS)), 5.7L 8-cylinder ((350 V8)) · RWD
21 mpg (11.2 L/100 km) to 17 mpg (13.8 L/100 km)
Frequently asked questions
What engine does the 1984 Buick LeSabre have?
Varies by configuration: 3.8L 6-cylinder ((GM-BUICK)), 3.8L 6-cylinder ((GM-BUICK) CA model), 4.1L 6-cylinder ((FFS) CA model), 4.1L 6-cylinder ((FFS)), 5.0L 8-cylinder ((GM-OLDS) CA model), 5.0L 8-cylinder ((GM-OLDS)), 5.7L 8-cylinder ((350 V8) (DIESEL)). Engines can differ by trim, so check the trim list below.
What is the fuel economy of the 1984 Buick LeSabre?
Combined fuel economy is 16 mpg (14.7 L/100 km) to 21 mpg (11.2 L/100 km), as published by the source shown in the specification table.
Are there recalls for the 1984 Buick LeSabre?
NHTSA lists 2 recall campaigns for this model year (last checked November 9, 2026). Details are in the Recalls section.