I recently changed out the battery and now my stereo will not work.... it has a message on it that says "Loc". Anyone know how to un-lock it??? :banghead:

If you have the owners manual there is a procedure in there that tells you how to do it. If the previous owner wrote down what the code is (like my previous owner did) you will have no problems. If not you may have to take it to the dealer to have them unlock it. My 97 Suburban is not here or I would post the procedure for you from my manual.

My wife followed the owners manuel but apparently the prevoius owners put in there own.... I was hoping someone could tell me how to do it without having to go to the dealer. With my schedule it is real difficult to do this.

See if this link helps: http://www.radio-code.com/GM-Pay-Page-radio-code.htm