The 2009 Buick LaCrosse is powered by a 3.8-liter V6 engine (GM’s 3800 Series II) paired with a four-speed automatic transmission. This setup represented the standard powertrain for that model year.
Released in the mid-2000s as Buick’s full-size sedan under the LaCrosse name, the 2009 model sits in the early generation of LaCrosse designs built on GM’s Epsilon II platform. The engine choice for 2009 reflects Buick’s emphasis on smoothness and quiet operation rather than high performance.
Engine type and configuration
Key specifications of the 2009 LaCrosse's engine are summarized below.
- Engine: 3.8-liter V6 (GM 3800 Series II)
- Configuration: V6 with OHV pushrod design
- Fuel delivery: gasoline, fuel-injected
- Transmission: four-speed automatic
The 3.8-liter V6 in the LaCrosse was chosen for its reliability and smooth operation, aligning with Buick’s priority of comfort and refinement in daily driving.
Context and performance
Engine family and reliability
GM’s 3800 V6 family is renowned for durability and ease of maintenance. In the LaCrosse, this engine delivered steady, quiet power suitable for a mid-size luxury sedan rather than sporty performance.
What drivers can expect
Owners typically experience a refined, comfortable driving experience with ample power for routine highway cruising, though it’s not designed as a high-performance engine.
Summary
The 2009 Buick LaCrosse uses a 3.8-liter GM 3800 Series II V6 with a four-speed automatic transmission. It’s a durable, comfort-oriented powertrain that fits Buick’s emphasis on a smooth, quiet ride during that model year.