* Horsepower and torque expected to top previous model (testing is ongoing — check media.gm.com for updates) * NOx emissions reduced at least 63 percent over 2010 models * Quieter operation * High - pressure (30,000 psi / 2, 000 bar) Piezo - actuated fuel system for greater fuel efficiency, improved performance and reduced emissions * Exhaust brake system that enables controlled vehicle slowdown on downhill grades without actuating the brakes * Selective catalytic reduction after - treatment system using diesel exhaust fluid (DEF) injection to provide the best overall diesel characteristics and performance — with a range of about 5,000 miles (8,000 km) between DEF refills * Combustion and after - treatment have been optimized to provide about 700 miles (1,125 km) between diesel particulate filter
regenerations — a 75 - percent improvement over the previous system and
significant contributor to improved fuel efficiency, as the
regeneration process requires additional fuel * B20 biodiesel
capability for an alternative fueling option * Internal revisions that improve durability
Crumpton says «such an energy storage and electricity
regeneration capability would be a
significant aid to delivering the UK's large but highly variable renewable energy resources, particularly wind energy, to consumers as and when demanded».