I have a Euclid catalog on my desk. Looks like Chev uses either a 2 1/8 spindle or a 2 1/2 spindle. We now use a 1 piece locking nut, but when we still used these, we always threw away the old locks because if a nut comes loose on the driver side, the wheel comes off. If it comes loose on the passenger side, it gets tight to where it locks off. If you can't find a quick source, there are about a half dozen Euclid distributors that I deal with.
