GM issued a warranty for this after the fact for injectors, which now have 7 year/200,000 mile coverage. Initially GM denied it was a problem, but after being sued by a consumer group, GM relented and included overheating and blown head gaskets as a warranted item. Early on customers came forward complaining of severe overheating, and also in some situations blown head gaskets. Fuel leaked and entered the crankcase, causing oil dilution. The most problematic issue with the LB7 is injector failure. It is a 32-valve design with high-pressure common-rail direct injection and a experimental composite design cylinder head. RPO LB7 (engine code “1″) was first introduced in 2001 and continued until mid 2004.
On May 9, 2007, DMAX announced the production of the 1,000,000th Duramax V-8 diesel at its Moraine facility. In 2006, production at Moraine was reportedly limited to approximately 200,000 engines per year. This engine was initially installed in 2001 model year Chevy and GMC trucks and has been an option since then in pickups, vans, and medium-duty trucks. The 6.6 liter Duramax is produced by DMAX, a joint venture between GM and Isuzu in Moraine, Ohio. The Duramax is General Motors diesel engine family for light- and medium-duty trucks, designed by Isuzu. Here’s to learning something new- Cheers! Diesel Tees This article will detail the differences, break down of years and specs.
PIEZO INJECTOR ON LB7 DRIVERS
Heck, even a lot of Duramax drivers and fans don’t have any idea what the difference between an LB7 and an LML is. Most non Chevy Diesel drivers have no idea what the Duramax nomenclature alphabet soup is all about.
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