2007-2009 GMC C8500 Topkick(Engine Oil Cooler Line to Engine Block-w/RPO Code MWE (Pilot Shaf). 2003-2006 GMC C8500 Topkick(Engine Oil Cooler Line to Engine Block-V8 496CID 8.1L). 2003 Workhorse P42(Engine Oil Cooler Line to Engine Block-V8 496CID 8.1L). ).
