Choose an Engine Size for 1999 Chevrolet Silverado 2500 Use the links below to find the right magnetic drain plug for your vehicle. Allison 1000 Tranmission Drain PlugDuramax Fuel Bleeder ScrewFront and Rear DiffsV6-4.3LV6-4.8LV8-5.3LV8-6.0LV8-6.6L Diesel TurboV8-8.1L