reducing overall NOx emissions. The EGR cooler on the LML features a bypass circuit so that flow will not be impeded in the event that a cooler becomes clogged with
To further reduce NOx without using more EGR, selective catalytic reduction (SCR) technology was added to the engine’s exhaust after treatment system. By injecting diesel exhaust fluid (DEF), a mixture consisting of 32.5-percent urea and 67.5-percent water, after the DOC (yet before the DPF)...
6.6L LMM Duramax Engine Specs, History, & Information Poor fuel economy and DPF clogging were amongst the earliest and most prominent concerns regarding the 6.6L Duramax LML. It's noteworthy that this was not a GM issue - these complaints were felt industry wide as Ford and Dodge rolled out...