Gotta link?...........
Here’s a link to a story about it from Oct. 2011, but I heard this latest info from American Farm Bureau Federation:
“The Silverado HD and Sierra 2500HD will have a range of over 650 miles, will be available in standard box and long-box, 2 and 4WD in extended cab models, Vortec 6.0L V8, seamless transition between fuels, single lightweight Type 3 CNG tank in truckbed.
http://fleetowner.com/equipment/news/gm-cng-bifuel-comm-pickup-1004