Released in August 2004, the WL brought with it an all-new 3.6-litre "Alloytec" V6 engine, succeeding the WK's "Ecotec" unit. Power and torque figures were rated at and , respectively. The Statesman's optional V8 was the version from the WK Caprice, with the WL Caprice's engine obtaining a further . The V8s received a stronger "GM 4L65-E" automatic transmission, while the "Alloytec" V6 versions received a new five-speed "GM 5L40-E" automatic. Several new safety features were added to the WL line-up. Such include brake assist, electronic brakeforce distribution, Electronic Stability Program and LED tail lamps. The new LED lamps give an additional of warning to trailing motorists travelling at because they illuminate in 60 nanoseconds, compared to 1,000 for conventional incandescent light bulbs. 2005, General Motors began exporting the Statesman to China, where it was badged as the Buick Royaum. The Royaum was initially equipped with the 3.6-litre "Alloytec" engine fitted to the Statesman, however the 2.8-litre "LP1" engine followed later in the year. Both engines were paired to a 5 speed automatic gearbox. Trims levels were known as 2.8 GL Deluxe, 2.8 GL Comfort and 3.6 GS Deluxe. The 3.6 trim level was changed to 3.6 Luxury Sports for 2005 and was priced at (). The Royaum unfortunately wasn't a big success with 2,008 sales made in 2005 and 3,631 sales in 2006. Production ended in the same year.