HELP!!! 92 loyale 4wd and climate control problems

ok, here's the deal, I put my 92 loyale in 4wd sunday night because of the snow and sometime yesterday it decided that it didn't want to come out of 4wd. This model has the push-button style of 4wd. I've tried just about everything I can think of to get it back in FWD and so far, no luck. Any suggestions on what i could do to fix it? (keep in mind that i don't even have money for gas since i'm a college student)

also, at about the same time this happened, the heater/AC controls stopped working correctly. Any button I push simply turns on the main dash vents at whatever temp I have selected... thus my floor vents and defroster are not working. Does anyone know whether this particular model has vacuum operated controls or electric?

turned out to be a couple of disconnected vacuum hoses in the engine compartment. works great now :D