crankshaft sensor

Where and how do I change it on A 2000 venture

I answered this via e-mail, but need to add some info. Your van could have two different types of crank sensors. One is located in the rear of the block and is secured by one 8mm headed bolt. No special tools are required to replace it. If your van has the one behind the harmonic balancer (the big pulley bolted to the end of the crank) you'll need a harmonic balancer puller to get to it. I also believe you need to check the air gap between the balancer and the sensor on that style, so make sure if you attempt this yourself, that you have a repair manual handy.