Although this micrometer isn't accurate enough to measure down to the 0 .0001" does this rotor measurement still show that we have a parallelism issue? Yes. 1.041-1.038=.003^n .003" is still larger than the .0002" parallelism tolerance given to us by GM. No.

Yes.<br /><br />The measurement of the rotor still shows that there is a parallelism issue, even though the micrometer is not accurate enough to measure down to the 0.0001" level. The difference between the two measurements is 0.003", which is larger than the 0.0002" parallelism tolerance given by GM. Therefore, there is a parallelism issue with the rotor.