Bizarre interior lights
 

Our 2004 H2 now has over 70K miles on it. It's the longest we've ever kept a vehicle but it's been ultra reliable and the entire family loves it.

For the past 6 months I've noticed a very random electrical issue. While driving the 4WD selector lights will all come on at once for about 3 seconds then go off. It's very random and the sequence is not associated with how long I've been driving or anything else. I took it to the dealer and they have no clue.

Anyone else have this issue and if so, should I be worried?

I do have my sights on a 2008 model so i wonder if it's time to trade it in. All 4 of our HUMMER's have been very reliable and this is the first issue I'd consider somewhat bizarre.