Look for full-size General Motors pickups -- Chevrolet Silverado and GMC Sierra -- to be powered by propane (LPG) or compressed natural gas (CNG) as soon as 2012, says Jeffrey Luke, chief engineer for GM's full-size trucks worldwide, in a conversation with USA TODAY at the Detroit auto show.
http://content.usatoday.com/communit...n-on-lpg-cng/1
http://content.usatoday.com/communit...n-on-lpg-cng/1
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