I tried holding both buttons (on mine they are mode and E/M) and nothing happens, so either mine is faulty, there is a difference between 99 and 2000 (yeah, right) or I'm not doing it right. I've only had this van a few days, but the average mph, average mpg, and I think even the gallons used have a...

Hey everyone, I'm new to this forum, having just bought a 2000 astro rwd lt. I just ordered an owner's manual on eBay, so hopefully some of my questions will be answered as I read that, but I'm wondering if there's any way to reset the overhead display for average mpg, gallons used, and average mph....