According to my research, your 1998 Pontiac Trans Sport Van can be flat-towed with all four wheels down but you will need to use a lube pump on the transmission to do so which we currently do not offer. I recommend confirming this with your copy of the owner's manual as that will have the final say so.
In order to flat-tow this vehicle after you acquire the lube pump you will need a base plate kit, tow bar, safety cables, wiring harness, supplemental braking system, and possibly a high... view full answer...