[chevychic]

I had the same problem with play in my shifter. It was something I just lived with until one day, I couldn't put my truck in park. I could hold it there, but if I let go it slipped into reverse. I had to engage the emergency brake while I was holding it in park until my lunch break that day. It took me about 15 minutes during my lunch break to locate the problem in the shift linkage and fix it. It's an easy fix and now my reverse lights stay on when I'm in reverse without me holding it in.
Check the shift linkage, it's a quick and easy fix....nothing to it.