New for 2010

GM has dropped the long-running 6.0-liter V-8 engine from the Sierra lineup, leaving the powerful 6.2-liter V-8 for heavy towing needs. The rest of the Sierra's eight-cylinder lineup benefits from increased availability of its new six-speed transmission for regular and extended cab models equipped with the 5.3-liter V-8. Also, the 4.8-liter and 5.3-liter V-8 engines have been enhanced, with variable valve timing for improved emissions and better fuel economy.

Those with portable MP3 players can connect and play their music collections with the truck's audio system through a USB connection. Standard side curtain and side-impact airbags are welcome safety additions.

    See also:

    Airbag On-Off Light
    If the vehicle has an airbag on-off switch, it also has a passenger airbag status indicator located in the overhead console. United States Canada and Mexico When the vehicle is started, the pas ...

    Entry Lighting
    The vehicle has an illuminated entry feature. When the doors are opened, the dome lamps will come on if the dome override button is in the extended position. If the dome override button is pressed in ...

    Power Door Locks
    Base Model Uplevel Model (Unlock): Press to unlock the doors. (Lock): Press to lock the doors. ...