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:

    Windows
    Press the switch to lower the window. Pull the switch up to raise it. For more information, see Power Windows on page 2‑21. ...

    Noise
    One thing those shoppers might find objectionable is the noise — specifically, wind noise and outside noise intrusion. Wind noise, an issue on highways, wasn't extremely loud, but there was a no ...

    Playing an MP3 CD
    For vehicles equipped with the MyLink or IntelliLink infotainment system, see the separate MyLink/ IntelliLink Features and Functions Guide for more information. To play an MP3 CD, follow the same ...