hello all, looking for opinions on where to buy a pcm. Should i try junk yard or online for 290 a plug and drive. If i get at junkyard and bring my old one to match what are chances i install and it starts or do i have to tow it to a dealer to get programmed. I can also use old pcm put it in and really push on wiring harness to get it going for a bit until they move and i assume lose contact and van dies and i haveto go thru whole process of turning key wiggle harness and wait to hear relays click on then start van