the reman ecm is new gm #88961146. the junkyard ecm and my stock ecm DO NOT have the same service number but the junkyard interchange said it would work. all 94 95 northstars have service numbers 161xxxxxxx gm #88961146 is the replacement for the 161xxxxx numbers .....or that is what i was told
thanks

 

Non-matching used ecm is cause for no pcm data. Talk to dealer who sold you reman ecm explain engine now runs on all 8 but trans shifts hard. They should warranty it and exchange ecm.