Diesel Bombers - 2010 Chevrolet Silverado 1500 diesel

The price of diesel fuel is at a record high but that’s not deterring General Motors and other light truck manufacturers from introducing all-new diesel engines in their half-ton pickups by 2010. Just hours ago, our spy photographers caught the first images of GM’s light-duty diesel pickup.

Pay no attention to the 2500 HD decals on the doors of the Chevrolet Silverado engineering mule in these pictures. The six lug wheels (instead of eight, like the real 2500 HD) give away that it’s actually the 1500 series pickup and the exhaust-cooling Venturi tailpipe out the back is GM’s diesel powertrain signature.
Under its hood is GM’s revolutionary new dual-overhead cam 4.5-liter Duramax V8. The 4-valve engine was designed with 6 dozen fewer parts than a conventional diesel. Separate intake and exhaust manifolds have been eliminated and integrated directly into the engine. Airflow is reversed, so fresh air enters through the outer portion of the cylinder heads and exhaust gases are dumped inboard into a variable vane turbocharger and EGR cooler that sits in the valley of the 72-degree V8. Removing hardware and rearranging key components reduces the 4.5-L Duramax’s footprint compared to conventional V8 diesels with similar displacements, so the 4.5-L Duramax can fit in the same space as GM’s 6.2-L small-block gas V8.
GM officially says it expects the 4.5-L Duramax to deliver class-leading horsepower and torque, with ratings in excess of 310 horsepower and 520 pounds-feet of torque. It will also meet stringent 2010 light-duty emissions in all 50 states, using a diesel particulate filter to remove soot and urea selective catalytic reduction to scrub nitrogen oxide.
Even though it shares the Duramax name with the heavy-duty 6.6-liter V8 — which has been engineered and produced in partnership with Isuzu Motors — the new diesel is 100% designed by GM and will be built without isuzu's involvement.

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