2003 pontiac grabd am gt, battery died, now radio wont work?

Check all fuses under the hood ,and in the passenger compartment with a test light I'm sure you wil find one blown..

HI , Did you have the battery checked or replaced ? and still the car wont start ?do you have any dash lights , or head lights ?

try using a fault scanner to reset the CPU program in the ECM

Fuse blown?

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starter or starter relay ..just hope it is not your timing belt ,,,they will be billing you for the starter labor as well as a bunch of things they want to pad their pockets with ..if it is a labor bill of 900 bucks they probably did what I mentioned ..Good luck

charge battery? fuse blown?

With the fuse out, see what doesn't turn on, or operate. (Dash lights, clocks, lighter, power ports, etc...)

06 pontiac g6 wont shift out of first gear. need help please!

If you bought the car used, you will have to contact the dealer or person that sold it to you. They have set a 4 digit code that must be used to clear the radio.
Good luck, let me know.
Regards,

Hello.
Usually that means that the battery is dieing.
Check to see if its good.
If thats not it was damaged.

Take it to a local repair shop.

Hope it works