I just realized I didn't mention in this thread the coincidence I encountered with this Suburban. It has the exact same key as my other Suburban. It's a pretty weird thing using my one usual key on either one.
That brings back a memory on a 96 Tahoe I helped fix in the body shop when I was about 14. Dad asked me if I switched the handle on the door we put on it and I told him no, but the key fit it and worked it perfect.