I'am having an issue with my key fob.I thought it was the battery,so I changed it and NOW it's NOT working.I think that it needs to be re-programed.or do I have to get another one.I've ordered one about 3 yrs ago,but they don't take m/o.What can I do?

i ordered one of these a couple years ago for a friend of mine from E-bay.he had one and needed a second one.very easy to program.it was a used one,but who cares,he had a used car! it was a factory 3 button GM with a picture of a key with DOOR on one button,UNLOCK on button beside it,and last button in the middle was a picture of a car with the trunk open,with olds logo at the very bottom.it was $7.00 free shipping.worked like a new one.you can get two of these for $12.88 free shipping,with programming instructions included,also his came with a battery installed in it.if your old one is one of these FCC ID numbers on the back,then it will work.FCC ID : ABO0104T or ABO0103T.eBay item number:290966725662.REPLY BACK FOR IMPORTANT INFO .