The Silverado 2500HD now sports a new front fascia and revised side moldings and taillights. Top-of-the-line models also get power-folding heated mirrors with puddle lamps and turn signal indicators. On the inside, the Silverado offers numerous entertainment options including a Bose stereo system (with rear-seat controls on crew cab models), XM Satellite Radio and a rear-passenger DVD-based entertainment system (crew cab models only). The instrument panel and center console have been redesigned, and Chevrolet has added new seats, a more comprehensive driver information center and a dual-zone climate control system. On the hardware side, the standard 6.0-liter V8 gets electronic throttle control, as well as the ability to run exclusively on compressed natural gas (CNG) or a mix of CNG and gasoline.