OK, so some background on the car. it's a 2001 Cav z2k. It' s automatic, and except for a few minor things, is stock. The only things i have done (semi-performance wise) is an RKSport Cold air, and High flow cat.
Here's what happened... Since im from the frozen north, it snowed. correction, it snowed alot. The right side inner fender well (the plastic insert) had been ripped away from a previous bout with a snowbank. i've noticed there is a wiring harness in there. the front bumper got just about packed with snow, and i proceeded to get stuck. so, i used the age old method of "rocking" the car. going from reverse, stop, drive, stop, repeat. though i eventually got out, the next day (not even encountering much snow) my service engine light, my trac off light, and my abs light all blew at the same time. i thought it was probably just a code in the ecu, and shut it down, disconnected the negative battery terminal, and tried again. still on. To note, i do not have traction control anymore, or abs. but the rest of the car runs smoothly, trans shifts fine, ect. ect.

maybe this has happened to someone else?

Check your fuses under the hood. Also, your ECU is under the right fender, so having the liner ripped out, then caking snow in there, all adds up to way to much moisture jammed in around your ECU. The ECU itself is pretty water-tight, but the harness isn't, so some water probably got in there and shorted something out. I'd get under there and pull the thing out and blow it out with some compressed air, or even a hair dryer to dry it out, particularly the plug area of the harness. If you have checked all of your fuses under the hood and in the car, and nothing is blown, then you may have actually caused a problem. Since the ABS computer isn't located there, I'm guessing at least that will turn out to be a fuse, but it's also possible you pulled the wire from the sensor at that wheel when you got hung up in the snow.

Hope some of that helps.

you should probably check the wiring harness for pulled wires. i had the same problem with my abs light coming on

Definitely sounds like a wheel sensor has come unplugged... or the wiring is damaged.