Buick Repair Questions? Ask a Mechanic for Answers ASAP
Any issues when putting it into drive? And does your dash have a digital display for the gear you are in, and is it registering correctly?
is the gauge display for what gear you are in displaying correctly?
The neutral safety switch was just a two wire pin, correct? I would check the wiring to ground (measure with an ohm meter or test light) on the black w/white wire.
Have you checked fuses? I have the following for the transmission-
fuel/ecm 20a and ign 10a in underhood fuse box
ecm 15a and indic 10a in interior fuse panel