![]() As a result, GM is considered the original pioneer of the 1/2 ton diesel in the United States, although credit is often given to Ram Trucks for the introduction of the 'EcoDiesel' for their 2014 model year Ram 1500 pickup. ![]() Interestingly, the engine was offered in 1/2 ton, 3/4 ton, and 1 ton GMC/Chevrolet pickups, as well as Blazer and Suburban models. 6.2L diesel engine block's and cylinder head's were produced from cast iron. The heart of its injection system is the Stanadyne DB2 injection pump, the same pump used on the 5.7L Olds, International's 6.9L/7.3L IDI, and the later N/A 6.5L diesels. Being naturally aspirated (a turbocharger was never offered as OEM equipment), the 6.2L diesel has a relatively high compression ratio. Properly tuned and maintained, the engine well known for achieving fuel economy figures well into the 20's impossible to beat with a small block V-8 or even V-6 gas engine of the same era. Additional, the robust design of a diesel would mean the engine would outlast a comparable gasoline engine. They wanted an engine that could haul hay to, from, and around the ranch while consuming as little fuel as possible. GM never intended for Detroit's 6.2L diesel to perform the heavy lifting. The 6.2 was manufactured by Detroit Diesel, a division of General Motors at the time. The 6.2L diesel was introduced for the 1982, following the retirement of Oldsmobile's 5.7L diesel.
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