General Motors has introduced the 2.8L Duramax diesel engine powered Chevy Colorado ZR2 Concept at the Los Angeles Auto Show this week. Resting on top of 275/65R18 off-road tires on custom 18-inch aluminum wheels, it has a wider body and tracks than its cousin, the Colorado Z71. Its broad torque also makes it powerful at a relatively low rpm, while the turbocharged performance gives the driver a smooth ride. The four-cylinder diesel unit gives it around 181hp at 3400rpm and brand new front and rear bumpers extend approach and departure angles for off-road driving, making the ZR2 Concept an efficient and beautiful model that will hopefully soon be part of the midsize truck market. More photos below.