Originally Posted by
hypurone
It can be done yes, but you have to change so many components to do it that it makes it a non-starter for most... Last I read, you would have to obtain a new ECM & TCM that are "PAIRED" to each other for the 89T, plus the dash would need to be paired to them and I don't think that can be done, so a NEW DASH is needed, then once that happens I believe the VCM (that does the VSC and something else) needs to be changed to match the new Dash, I am going from memory on this and my discussions with a friend who was trying to get it done so I may have the last part wrong.
Either way it isn't for that faint of heart and trying to find someone adept enough to undertake is daunting! My friend contacted dealers as well and NONE of them would touch it!!