i changed my battery earlier today on my 2000 blazer. the radio now says loc. of course i dont have my original book! anyhow from looking on previous posts on here i figured out how to get the 2 different 3 digit codes. i called the 1-800 number and pushed 1 for chevy. then the guy prompt doesnt say anything. im not sure what to do next to give me the 4 digit code to put in my radio. the first time i tried i pushed 220107*. the prompt said it was wrong. the second time i tried 220107#, same thing. the third time i waited to see if the prompt said something and it said it timed out (after about 30 seconds). anyhow, im stuck! i have no clue what to do. its sunday night before christmas and im not sure that ill be able to get a hold of someone at the dealership until wednesday. if anyone could help me, id appreciate it so much!! thanks in advance.

 

Procedure to unlock the radio - Automotive Forums .com Car Chat

 

i read through and tried it, but it still says invalid account number.

 

Try that.

 

Call 1-800-537-5140, then enter 620529 followed by the # sign. When prompted, enter the 6 digit code from the radio and it will give you a 3 or 4 digit code to enter into your radio. When the correct code is entered, your radio will read "SEC" and work properly.

 

you can always call chevy

 

Pretty cool link to the youtube theftlock-unlock!
Thanks!