Ok this is my third 92 GM wagon. If I remember right the trip odometer reset button should be just to the right of the numbers. On this one it's not there, or anywhere I can find. Here's a picture of it.
That's really odd as mine's right next to the trip. Guess the reset button was a separate, extra-cost option.
I thought it looked familiar. The button is on the upper right just above that blue outline. It looks like your button is hidden above the dash face piece. Somebody had it apart and snapped the dash piece back on below the button, gap on the bottom shows that too. Either that or the cluster is in too high.
I didn't even see that untill I looked at the picture again but you guys were right. It was hidden under the bezel. I took the bezel loose and repositioned it above the reset knob and it now works just like it should. Thanks guys!
I love it when a plan comes together. That sure had me scratching my head until I went out to the garage and looked at mine.