APDTY 103931 Vertical Heat Sink For GM 6.5L Diesel PMD/FSD Fuel Pump Module (Allows Vertical Installation Of Heat Sink To Release More Heat) Allows PMD To Be Vertically Mounted For Better Cooling Anodized Blue 6061 Aluminum For Long Trouble Free Life Allows Use Of Factory PMD / FSD Wiring Harness Bolts In Place Of The Pump Motor Cover