If the A/c button is pushed in and the light on the button is on, should the inside/outside air button light stay on whether it's pushed in or not? The inside/outside air button light only goes off when you push it in and the A/C button is out and its light is not on. How is this suppose to work???

i noticed the same type of thing on my 98 blazer when i had that. i don't know exactly how it's suppose to work, but i don't think yours is unusual.

On mine, the recirculation button light is off if the AC light is off. The RC light comes on when the AC is on under 2 conditions: 1)pushing the RC button in; or 2)when the temp control is turned to MAX.

Has someone messed with the dash, maybe when installing or changing the radio? It sounds like you have some loose or incorrect electrical connections.

Mine does the same thing. Aftermarket stereos do weird things to the lade, at least the 2000's. My wipers cause my deck to cut out sometimes.