4x4 warning light question

[evan]

I'm having trouble with the search function on this board so I hope it's okay to ask.

The 4x4 warning light came on in my 2001 Silverado the other day. At the same time the lights beside the 4x2, 4x4 Hi and 4x4 Lo were flashing as though it were having trouble picking one. It seemed to continue driving fine. I shut it off and started it again and it kept doing it. I re-started it again and everything went back to normal.

Have you guys seen this before? Is it an easy diagnosis or should I take it to a shop? Let me know if you need more info.