he second-generation TrailBlazer was unveiled as a concept at the 2011 Dubai Motor Show, and as a production model at the Bangkok Motor Show on March 21, 2012. The TrailBlazer returns to the roots of General Motors' classic body-on-frame SUV's that the first-generation TrailBlazer abandoned. As is the case with the original Chevrolet Blazer (1969-1994), Tahoe (1995–present), Suburban (1935–present), S10-based Blazer (1983-2005), the TrailBlazer will be based on a pickup truck chassis, in this case the 2012 Chevrolet Colorado.
Engines
The 2012 Trailblazer comes with two engine options, both diesel, one featuring a Duramax 2.5 L, 150 hp (110 kW) 350 Nm (258 lb-ft) standard, and an optional Duramax 2.8 L, 180 hp (132 kW) 470 Nm (346 lb-ft). For the Brazilian, South African and Saudi markets, a 3.6 V6 24V petrol engine producing 239 hp (in Brazilian market, the 2015 version producing 277 hp) (179 kW) 360 Nm (265 lb-ft) is also available.
The 2014 - 2nd generation, MY14 Duramax 2.8L diesel engines have several new parts, namely a new water-cooled variable-geometry turbocharger, a new high-pressure common-rail fuel delivery system, a new Exhaust Gas Recirculation (EGR) system, a new intake manifold, a new cylinder head, a new cylinder block, a new balance shaft unit and a new Engine Control Module (ECM) and now produce 200 hp and 500 Nm of torque.