Here we have the wiring harness that goes around the engine and down to the transmission removed from a 2007 2500HD Duramax truck with the 6.6 Lbz engine. Excellent functioning condition and removed from a running and driving truck, appears to have some minor repairs through the years. This is NOT the harness that sits right on top of the engine. This will only fit the 06-07 LBZ engines. Please view photos carefully, Make sure this will work for your application BEFORE purchasing.