Isuzu's SUV loses its seven-passenger versions and available V8 engine for 2007. Ascender is a retrimmed Chevrolet TrailBlazer/GMC Envoy; the GM versions also offer only five-passenger models for '07. Ascender is available with rear-wheel drive or with 4WD that can be left engaged on dry pavement and includes low-range gearing. The sole powertrain teams a 291-hp 6-cyl engine with a 4-speed automatic transmission. ABS and traction/antiskid control with rollover sensors are standard. Curtain side airbags are optional. Available OnStar assistance is dropped for 2007, but power-adjustable pedals remain among the options. Ascender's performance and accommodations mirror those of comparably equipped Envoys.