E-mailed support and they are unable to answer, said look for free advice on forum. 12200411 swapped form 2002 V6 to 98 5.7, unlocked and pinned correctly, will start and run poorly on 6 injectors. OS 12212156 is same for a repository tune of 2002 Express van but segment swap will not work. 2 answers exist in the forum, one member said these segment swaps work, another member said he needed to purchase additional credits for the 8 cyl. base tune from repository. Give another $100.00 to HPTuners for credits might work or go on a global search for a 2002 Express van 5.7 pcm?