My 1992 Buick 3800
Hello, can you describe how you change the crank sensor on this engine. I think
this is the problem Ive been fighting. Thanks for your help.

JK:
OK, glad to hear. I would suggest a technician performing this repair. Here is
why.....
1- remove belt
2- remove crank pulley using special puller. Also, common for rubber damper
inside pully to shift and block the holes that the puller needs to screw into. Also
may have to remove/loosen front lower engine mount(if it has one) and/or lower
the frame and support frame engine assm. to gain good access to the pulley.
3- remove plastic shield
4- remove sensor.
5- sensor will have to be adjusted with another special tool as not to het the steel
vanes on the inside of the pulley when engine running    
GM 3800 V6 Crank shaft position sensor locations picture.
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Crank Position Sensor Location Picture