Sorry to necromance an old thread, but I think this is whats going on with me right now.

I stopped into local walmart before to grab a few things before work, came out to the car and fob did not want to unlock car, unlocked the drivers door manualy and set the alarm off.
Tried starting the car, which didnt work, thought the fobs batteries might be the culprit so went back inside to buy new ones. Well this did nothing and running out of time before I had to be at work I called up my old man to give me a lift.

So now im at work reading about the situation. Car is an 05 limited with 60k, and im wondering if my issue may be just battery related? Really wont know anything til I can get back to it in the a.m. after work when I can try disconnecting the battery. Suggestions / comments? Only owned the car for bout 2weeks so still learning about it, and why the heck dont they put this info in owners manuals ><