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: Help Indentifying each gen Duramax engines. HFH 12-10-2007, 08:12 PM To make it easier for me, can someone tell me what the 8th vin number is for: LB7 LLY LBZ. Sorry if this sounds dumb. Just having a heck of a time identifying some of the 04's. Thanks. NCMIC 12-10-2007, 08:41 PM Lb7 - 1 Lly - 2 Lbz - D NCMIC 12-10-2007, 08:42 PM The 04s will either be an LB7 or LLY. HFH 12-10-2007, 09:04 PM Thanks NCMIC! silverstreak04 12-10-2007, 09:58 PM and you want the lb7, much better. modified 12-10-2007, 10:14 PM Here's also some engine ID info, thanks to Kennedy Diesel. Check out his site. http://www.kennedydiesel.com/categoryresults.cfm?Category=4 | ||