Auto Machine Shop 03 GM 6.6 LB7 Duramax 32V V8 Remanufactured Engine Lucinda 01 Jun 2014 Auto Machine Shop, Chevy GM Engines, Remanufactured Engines 4 Comments GM 6.6 LB7 Duramax Engine. We get serious power with GM 6.6 LB7 diesel truck engines. From workhorse to Sunday driving, it’s a beast that gets ... Read More »