Power / Torque: at 3200 rpm / at 1600 rpm Emission controls: Additional combustion control, including an even more efficient variable-geometry turbocharging system, cooled (enhanced) exhaust gas recirculation (EGR) and closed crankcase ventilation to reduce nitrogen oxides (NOx) Additional exhaust control, including oxidizing catalyst and new diesel particulate filter (DPF) to reduce soot and particulate matter Increased-capacity cooling system New engine control software Use of low-ash engine oil (CJ-4) Applications: 2007– Chevrolet Silverado HD 2007– GMC Sierra HD Chevrolet Kodiak GMC Topkick Chevrolet Express/GMC Savana LGH The 6.6L Duramax diesel engine (VIN code "L") is used on 2010 interim and 2011 Chevrolet Express and GMC Savana vans and 2011 Chevrolet Silverado/GMC Sierra HD trucks with RPO ZW9 (chassis cabs or trucks with pickup box delete). The LGH engine is rated at at 3100 rpm and at 1600 rpm. Similar to the LML this engine also uses a DPF and DEF system to meet emission standards. LML The 6.6L RPO LML (VIN code "8") is the 2011–2016 version of the Isuzu/GM Duramax V8 diesel engine. It is a further advanced version of the LMM engine with the majority of the changes addressing a required drastic reduction in engine emissions. Some mechanical aspects of the engine, such as piston oil flow design for improved temperature control and oil pump design, were also improved to enhance durability even further. The LML engine was significantly updated for 2011 to provide improved exhaust emissions that comply with the new federal emission standards for diesel engines, provide better engine rigidity and further noise reduction. New 29,000 PSI piezo injectors, a complete fuel system-hardening to tolerate up to 20% biodiesel mixtures and urea injection (to reduce nitrogen oxides) with a 5.3 gallon urea tank are updating the fuel and emissions systems. This engine has a fuel injector in the exhaust tract, to allow raw fuel injection during the particulate filter recycling routine. The RPO LML engine is rated at at 3000 rpm and of torque at 1600 rpm. L5P The L5P Duramax is the latest version of the Duramax V8 diesel engine.(engine code Y) Introduced in the 2017 model year it is the most powerful diesel engine GM has produced with at 2,800 rpm and at 1,600 rpm. Design spec performance can exceed at 3050 rpm and at 1975 rpm. L5D The L5D Duramax is a downrated version of the L5P for the Chevy Silverado MD and