Thought I should share some technical information about the new engine. Stumbled across it while doing a general search. Here’s the link I found, although I’ve also summarized some of the key points below:
http://www.sandyblogs.com/techlink/ (http://www.sandyblogs.com/techlink/)
· The new engines reduce NOX emissions to 0.2 grams per brake horsepower per hour, compared to 1.2 grams for the 2007 through 2010 engines
· Main bearing has been changed to enhance oil film thickness and the oil pump flow has been increased
· The thermostat in the cooling system now has bleed holes to improve bleeding air from the system
· A flat panel air filter replaces the cylindrical one
· The turbocharger oil feed has been moved from number 4 cam bearing to a dedicated port at the left rear of the engine valley
· A dual EGR (exhaust gas recirculation) cooler on the LML with a bypass controlled by the ECM to prevent carbon buildup in the EGR cooler during light loads and idling
· Fuel system high side pressure is 29,000 psi. Two high pressure lines to the right fuel rail and a transfer tube to the left rail.
· Injectors are Bosch piezoelectric operating at high voltage
· The ECM has more than 160 new DTCs
· On pickups, the battery positive cable incorporates a 175 amp main fuse, a 125 amp glow plug control module fuse, and a 175 amp air intake heater fuse. Vehicles with two alternators have an additional 175 amp fuse for the extra alternator
There’s extra details at the link, along with a nice picture and description of the DOC/SCR/DPF system in the exhaust line.
http://www.sandyblogs.com/techlink/F03_june_2010_techlink.jpg

Cool specs... Maybe GM created an EGR that actually works for once?

I hope the EGR and exhaust system crap can be easily turned off.