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Message: <blockquote data-quote="gl55" data-source="post: 1958847" data-attributes="member: 729"><p>ONG auctions their CNG trucks off when they get some miles on them. I was asked to try and edit the PCM on one several months back for someone that bought a former ONG truck. It was an 03 Silverado that was converted by a tier 1 GM supplier before being sold to ONG. I could read the binary file out of the PCM but couldn't open it with my tuning software. His truck would run on CNG anytime there was CNG in the tank. He said the later year ONG CNG trucks were switchable between CNG and gasoline with a switch on the dash. I think he said he paid $6500 for it at auction with around 150K miles on it.</p></blockquote><p></p>