Vehicle
Buick Park Avenue
The LeSabre's larger sibling and the car that carried Buick's supercharged 3800 — the Ultra's Eaton M90 blower, its own intercooler-less charge path and a different fuel and spark calibration, none of which the naturally aspirated car has. Everything else is shared: the same 4T65-E, the same Series II intake-manifold coolant failure, the same front-drive layout. The supercharger's coupling and its isolator are wear items with a distinct rattle, and are frequently mistaken for a failing belt tensioner.
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Generations
-
First generation 1991–1996
C-body. The Ultra's supercharged 3800 arrives here as the range topper.
- Body styles
- Sedan
- Platform
- GM C-body
- Engines
-
- 3.8 V6 — L27 · petrol · 127 kW (170 hp)
- 3.8 supercharged V6 — L67 · petrol · 168 kW (225 hp) · 373 Nm (275 lb-ft) · Ultra
- Transmissions
- 4-speed 4T60-E automatic
- Drivetrain
- Front-wheel drive
-
Second generation 1996–2005
G-body, shared with the Oldsmobile Aurora and the Cadillac DeVille. The supercharged Ultra continues to 2003.
- Body styles
- Sedan
- Platform
- GM G-body
- Engines
-
- 3.8 V6 — L36 · petrol · 153 kW (205 hp) · 312 Nm (230 lb-ft) · 3800 Series II
- 3.8 supercharged V6 — L67 · petrol · 179 kW (240 hp) · 380 Nm (280 lb-ft) · Ultra
- Transmissions
- 4-speed 4T65-E automatic · 4-speed 4T65-E HD automatic
- Drivetrain
- Front-wheel drive
Information, not instruction
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Have anything you intend to act on checked by a trained person against the manufacturer's own procedure for your vehicle. Nothing here replaces that procedure.
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