Engine Parts - GM 6 & 6 1982-2000 | XDP The Alliant AP0067 Glow Plug Wire Harness Extension for your 1994-2002 GM 6 Diesel is designed to provide protection for the glow plug wires used on cylinders 4 and 6 to provide protection due to its close proximity to the exhaust manifold. Related searches for 6 2 diesel wiring harness 6.5 diesel wiring diagram5000 ford diesel wiring harnesswiring harness for carswiring harness for trailertrailer wiring harness diagramautomotive wiring harnessford 3000 diesel wiring diagramwiring harness for classic cars