Gm. did not use a crank shaft sensor in 1988, It had a distributor that done everything.
On the harmonic balancer that's attached to the front of the cranck shaft
The crankshaft position sensor is at the rear of the engine where it joins with the transmission bellhousing. It is at the left (front) side, not far from the starter.
First I have to know what a cranck shaft is, I know what a crankshaft is.
The 1999 Chevrolet Alamo crank shaft position sensor is located on the back of the engine. You will need to remove the rear engine cover in order to access the crank position sensor.
The throttle position sensor is mounted to the throttle body on the end of the throttle shaft opposite of the lever.
The speed sensor is located on the transaxle on the passenger side of the car. It is near the half shaft.
Need to know what size engine.V6, Vortex 4.3
There is no need for a serpentine diagram for the 2001 xl7. Since it has two belts the only thing that you will need to remember is that on the power steering belt, the belt goes around the cranck shaft(Outer part of the cranck shaft, the alternator belt is installed prior to the power steering belt), the power steering pump and AC compressor. The flat part of the belt touches the flat part of the tensioners. Everything else is simple, the belt goes around the cranck shaft, fan and alternator.
It is bolted in the transfur case tail shaft housing.
It is on the left front side of timing cover behind the balancer.
The teeth on the timing belt right at the cranck shaft worn them selfs completley off so the cranck shaft just spins...Sounds like a starter but tis definitaly a timing belt problem...Bent valves and piston damage probaley
The spark plugs ignite the petrol vapour to produce an explosion that forces the pistons down and this is turned into motion by the cranck shaft.