Hi got a problem with my 2001 blazer LT (4wd L35 and automatic ) it all started up with that the PASSLOCK system engaged so the truck dident start ,, towed it to a GMshop (i live in sweden) and they tried to reprogram a new fob to get it working but dident succed ,, my solotion to get it running was to order a swap ecm from brian at pcmforless,com with the passlock system disabeld ,,, now im trying to program in the new fob (brand new in box) but i cant get it engaged ,, tried the standard precidure with pushing on the lockswitch and by using a tech 2 but it still not connects ,,, this problem it exacly the same with both ecms both the old once and the new once reprogrammed by brian ,,, is theres any other boxes that connects to the ecm for this passlock that may be the problem ? i would love to get my fobs working ,,,, the centrallock system works flawless from the masterswitch so this is plain problem between the fob and ??? (ecm ? )