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The 2009 Cadillac STS is available in two primary models designated by their type of engine: V6 or V8. The V6 model is powered by a direct-injected 3.6L DOHC V6, making 302 hp and 272 ft-lb of torque. Direct injection allows for an increase in power without a drop in fuel efficiency. The V8 model is powered by a 320-hp, 4.6L Northstar V8 engine. A 6-speed automatic transmission is offered througho..... |
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