Choose an Engine Size for 2007 GMC Sierra 2500 Classic WT Use the links below to find the right magnetic drain plug for your vehicle. Allison 1000 Tranmission Drain PlugDuramax Fuel Bleeder ScrewDuramax Oil Pan - Banana PanTransfer Case - DrainTransfer Case - FillV8-6.0LV8-6.6L Diesel TurboV8-8.1L