Calif. Drain Plug used on the Transmission. Engine Oil Drain Plug. Federal. From 03/22/2017. From 07/10/2001. From 09/01/2000. To 03/22/2017. To 07/10/2001. D. Engine. Included with: Lower Oil Pan, Oil Pan, Oil Pan assembly, Part is included with trans Pan assy, Trans Pan, Upper Oil Pan.