Under the Hood

Mechanical features include:

185-horsepower, 2.9-liter inline-four-cylinder with aluminum block and cylinder head, dual overhead camshafts and four valves per cylinder that makes 190 pounds-feet of torque
242-hp, 3.7-liter inline-five-cylinder with aluminum block and cylinder head and dual overhead camshafts that makes 242 pounds-feet of torque
300-hp, 5.3-liter V-8 with aluminum block and cylinder head and two valves per cylinder that makes 320 pounds-feet of torque; variable valve timing is new for 2010, primarily for improved emissions
Five-speed manual (standard on four-cylinder models)
Four-speed automatic (standard on inline-five-cylinder and V-8, optional on four-cylinder models)

    See also:

    Distracted Driving
    Distraction comes in many forms and can take your focus from the task of driving. Exercise good judgment and do not let other activities divert your attention away from the road. Many local govern ...

    New for 2011
    The Sierra Hybrid gets GM's OnStar 9.0 telematics system that GM says provides better voice recognition. GM also said they have worked to cut down on the amount of wind noise occupants hear. ...

    Engine Overheating
    The vehicle has several indicators to warn of engine overheating. There is an engine coolant temperature gauge on the instrument panel cluster. See Engine Coolant Temperature Gauge on page 5‑1 ...