Cutting to the question here: Is the crank bolt really not reusable? GM says not to reuse it but it seems hard to find a new one and the intention here is most likely to get the car running and sell it so I'm not big on spending a lot of time or money.
Longer story: My friend's 2006 Buick Lucerne with 3800 V6 engine cranks but won't start. I think I have the proper diagnosis of crank sensor since the electronics all have power, but there is no spark; the OBDII live data shows zero rpm while cranking. (No codes found). One of the channels of the crank sensor has the 3 pulses between 0 and 6.4 volts per revolution but I couldn't get any activity on the other one (the yellow wire), always at 6.4 volts. There is continuity from the ICM to the sensor on the yellow wire and no short to ground.
So I bought a new sensor and rented the harmonic balancer puller and will start the replacement in the next day or two. (if you're looking for the question go back up to the top).
Longer story: My friend's 2006 Buick Lucerne with 3800 V6 engine cranks but won't start. I think I have the proper diagnosis of crank sensor since the electronics all have power, but there is no spark; the OBDII live data shows zero rpm while cranking. (No codes found). One of the channels of the crank sensor has the 3 pulses between 0 and 6.4 volts per revolution but I couldn't get any activity on the other one (the yellow wire), always at 6.4 volts. There is continuity from the ICM to the sensor on the yellow wire and no short to ground.
So I bought a new sensor and rented the harmonic balancer puller and will start the replacement in the next day or two. (if you're looking for the question go back up to the top).