Air System Gauges

[cmillsap]

My prior 2000 LXi had 3 air pressure gauges. One for the front, one for the rear and one for the tag.

My current 2000 LXi has only one air gauge for monitoring both front and back and one tag air gauge.

My prior LXi had a tag dump switch and a suspension dump switch.
My current LXi has no tag dump switch and only a suspension dump switch.

I'm guessing my current bus was an earlier model than my prior bus as I don't remember the build date on my prior bus?

This would indicate to me that the air system design was changed sometime in the 2000 year models. I wonder why BB made the change?

Anyone know?