Hey guys and gals-
I was away from my home in Michigan for a few weeks, where my '98 30V Q/M slumbered under a pile of snow. I got back today and it starts up fine, but all 4 wheels are seized or frozen (verified by jacking up each corner and trying to move them, in N without the ebrake on).
As all 4 are stuck, I don't believe it's the ebrake system; the feel for the ebrake lever also seems normal. The brake pedal travel and force seems normal as well, so it doesn't seem like the caliper pistons are to blame. Plus all 4 going at once sounds a bit improbable. Rotors and pads are about 3 years old, so a little long in the tooth but not crazy.
Could it be something in the dif/trans? Or could they be literally frozen with ice?
I just wanted to get some input before I did something that does more harm than good.
Thanks!

 

Well in case anyone was wondering, it was just rust/moisture. I coaxed them loose with some whacks from a rubber mallet, and used a lug wrench to get them spinning. Now for some spirited (but safe) braking to clean the rotors up.