Draining & Refilling: Notes
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2002 GMC Sierra, 2002 GMC Cab & Chassis Sierra, 2002 GMC C3500 HD, 2002 Chevrolet Silverado, and 2002 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
The NV3500 requires a 17-mm Oil Fill/Drain Plug Hex Bit (J-36511) to remove and install fill and drain plugs.