Ascender is a retrimmed version of the GMC Envoy. It comes in a regular-length version with two-row five-passenger seating, and in extended-length form with three-row seven-passenger seating. Seven-passenger models offer 6-cyl or V8 power, 5-passenger versions only the 6-cyl. Both come with a 4-speed automatic transmission. The V8 comes with GM's Active Fuel Management feature, which automatically deactivates four cylinders while cruising to save fuel. Ascender is available with rear-wheel drive or 4-wheel drive that can be left engaged on dry pavement and includes low-range gearing. Antilock 4-wheel disc brakes and traction/antiskid control are standard. Optional are curtain side airbags that cover the 1st and 2nd seating rows. OnStar assistance and power-adjustable pedals are optional. Ascender comes with Isuzu's 3-year/50,000-mi. bumper-to-bumper warranty and 7-year/75,000-mi. powertrain warranty vs. GM's 3-year/36,000-mi. coverage. Maximum towing capacity is 6400 lb.