2011 Model Year Changes
Shortly after its release, the output of the 6.7L Power Stroke was increased from 390 hp/735 lb-ft to 400 hp/800 lb-ft. This occurred in response to General Motor's release of their updated 6.6L Duramax diesel. The new power ratings were announced August 3rd, 2010 and a dealer installed PCM upgrade was made available to owners of the original 390 hp model free of charge.
2012 Model Year Changes
• A stamped steel oil pan with a conventional bolt-type oil plug replaced the plastic oil pan and plastic 1/4 turn drain valve.
• The hidden locating stud on the oil cooler was removed for easier service/repair access.
• A second NOx sensor and sensor module were added to the exhaust system, used in measuring effectiveness of the SCR system.
• Revised oil and coolant feed lines for the turbocharger, quick connect fittings replaced with conventional bolt on fittings for improved sealing and durability.
2013 Model Year Changes
• Crankcase ventilation sensor added, signals to PCM whether the crankcase vent hose is connected or disconnected.
• Differential pressure (delta pressure) sensor added to the diesel particulate filter, used in implementing the active regeneration strategy as the filter reaches maximum capacity.
2015 Model Year Changes
The 6.7L Power Stroke underwent significant revisions for the 2015 model year, most of which contributed to or supported the increase in output from 400 hp/800 lb-ft to a maximum 440 hp/860 lb-ft.
• Particulate matter sensor and sensor module added at the DPF outlet in order to measure filtration effectiveness.
• Fuel pressure and fuel temperature sensors for low pressure fuel system combined into a single sensor, no longer two individual sensors.
• EGR cooler flow redesigned, now using the high temperature cooling system (same circuit as the engine) instead of the low temperature system (which still provides cooling for the charge-air-cooler, fuel system and transmission cooler).
• EGR inlet temperature sensor added.
• Revised fan clutch design with additional heat sinks in order to more effectively dissipate heat, thereby improving durability.
• IROX polymer coated lower main bearings introduced for added durability at greater performance levels.
• Larger GT37 single variable geometry turbocharger replaces the GT32 twin compressor "DualBoost" turbo. Improved throttle response and high altitude performance. Wastegate eliminated, turbocharger produces ~30 psi at max load with an impeller speed of ~130,000 rpm.
• New lower intake, required to match new turbocharger.
• Manually activated, more effective exhaust braking system added, works in conjunction with new VGT.
• Upgraded high pressure fuel pump (injection pump). New pump looks identical, but features a longer stroke.
• Revised injector design, more efficiency nozzle design for reduced emissions and improved performance.
• Larger crankshaft damper with more mass.
• Strengthened cylinder head design.
• High capacity torque converter introduced, transmission shift schedule not significantly altered.
2017 Model Year Changes
Changes, improvements, and upgrades to be announced...peak engine torque increased to 925 lb-ft.