The 2005 Trailblazer's 4.2 liter 275 hp I-6 has been improved for 2005.
For the fourth consecutive year, General Motors' Vortec 4200 inline six-cylinder engine has been recognized as a Ward's Communications "10 Best Engine."
http://www.theautochannel.com/F/news...15/304690.html
The following is new for 2005:
Available side curtain airbags, available 300-horsepower Vortec 5300 5.3-liter V8 with Displacement on Demand technology for EXT, new seat design, and new exterior colors: Superior Blue Metallic, Emerald Jewel Metallic, and Graystone Metallic.