Some systems perhaps... This was very much a sour grapes demonstration that Navistar did demonstrating how the emissions technology could be defeated... sour grapes because Navistar is comitted to EGR/particulate filter setups rather than DEF. They didnt' say anything about GM so I assume that their system is working correctly, or at least in the manner that you suggest. Their specific gripe was with Dodge on the 5500 model, Freightliner in general, Cummins and Detroit Diesel because their ECM's were not derating properly and also I think Kenworth... Wether the video is true or not, I don't know... but I'd think their claims would be very liableous if they were not true.
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Today's Featured Article - Restoration Story: Fordson Major - by Anthony West. George bought his Fordson Major from a an implement sale about 18 years ago for £200.00 (UK). There is no known history regarding its origins or what service it had done, but the following work was undertaken alone to bring it up to show standard. From the engine number, it was found that this Major was produced late 1946. It was almost complete but had various parts that would definitely need replacing.
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