It has hundreds of temporary positions to fill, but. Hair testing provides a longer detection window of approximately 90 days and tests for a range of substance from. Webjun 21, 2021 · the uaw is urging general motors to abolish its weed testing policy and to raise hourly wages to at least $18. Whether the company will take the demands. Webjun 28, 2021 · as the automaker struggles to find plant workers, the uaw wants it to stop testing for marijuana, which is now legal in michigan and many other…