GM introduces CNG bi-fuel Chevrolet Silverado and GMC Sierra pickups
Green Car Congress
MARCH 5, 2012
The Vortec engine features hardened exhaust valves and hardened intake and exhaust valve seats. The trucks use a 17-gallon Type 3 CNG tank made from composite material with aluminum liner and carbon fiber wrap. The Silverado and Sierra will be available in standard and long box, with either two- or four-wheel drive.
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