Re: Car battery trouble
 

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We did positive to positive and neg to neg.

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This is wrong. It should be neg to ground (part of the metal frame), not to the negative terminal of the battery.

Melch

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shhhhhh. Battery explosions are fun.

Re: Car battery trouble
 

Read your manual. The LOC thing means the anti-theft device for the radio kicked in. You'll have to take it to a dealer or repair shop to get the code to turn it back on if you don't know it, which i'm guessing you don't since you don't even know what year the car is.

edit: I have no idea why they put these on a GM factory stereo. Who'd steal that?

Re: Car battery trouble
 

It's fine to just admit you've bought a stolen stereo and can't get it working, no-one's judgemental here.

Try putting it in the freezer for a few hours, apparently that resets most of them.

Re: Car battery trouble
 

Usually the code is somewhere in the owners manual or on a card somewhere.

Look through all that "junk" they gave you when you bought the car