Quote: THe 5th one was always in the PDI package for the dealer to install instead of the wheel lock that had to be on them due to the factory being in Detroit.
You are close but here is what we found after researching the subject. (This was also verified by Bill Embree who actually did this job at the plant.)
Answer: We just haven’t put the yellow inspection dot on the lug stem yet!
When the tires and wheels were installed at the factory, the guy doing the mounting would line up the tire valve stem with the lug stud that had a yellow dot on the end of it. The valve stem was positioned in conjunction with the white balancing mark (not necessarily lined up with one another) on the back sidewall of the tire. This process kept everything in balance when the wheels were finally mounted.
