Hello, as far as the ignition module, it should be under the coil pack. If your not sure about the location of the coil pack, follow the plug wires.
![https://www.2carpros.com/forum/automotive_pictures/170934_buick_century_1.jpg](https://www.2carpros.com/forum/automotive_pictures/170934_buick_century_1.jpg)
I believe the crank sensor is on the backside of engine block. Don't have a picture.
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Thursday, March 5th, 2009 AT 1:38 PM