92 pontiac grand am 3.3l se shift indicator problem ???

[mplpjp]

hi i new at this so bear with me . i have a 92 pontiac grand am 3.3l 4 door
when you start the car its fine about 5 seconds later the P on the shift indicator goes out or blinks and then out at the same time my tach starts to bounce from 750 to 1500 rpms so you have to put in gear or neutral and everything is fine if you tap on the light in park sometimes it will stay on and its fine sometimes not THANKS FOR THE HELP MIKE

[3100]

repace prndl module (part that lights up p r n d 1 2 3) what happens is that pcm doesn't know if transmission is in P or drive and does not know what commands to give to idle air control sensor.

try one form junk yard it is not more thatn 5$

[mplpjp]

thanks alot i will try that today thanks