Alliant AP0024 DS Pump 8" Wiring Harness Extension 94-00 6.5L GM

The 6.5L's most prevalent engine related issue is failure of the DS Pump, and guess what, most of the failures are attributed to overheating because of their close proximity to the engine. The simplest upgrade is to simply relocate the pump, which requires use of an extension harness, such as this unit from Alliant.