First you need to get a number code from the radio. Hit the number 2 and 3 preset buttons at the same time, after 5-10 second a 2 or 3 digit number will appear. Write down then hit the am/fm button for the 2nd half of the number. Once you have it call GM, 1-800-537-5140, when prompted hit 102107*, the automated voice will ask for the code previously gotten for the radio . (ie; 123456*) It will then give the 3 or 4 digit unlock code. Note this is for Delco radios on Chevrolets. I'm guessing there is a different prompt for radios on other GM divisions.
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You should have used a battery saver plugged into the cig lighter before changing it out. The Dealer will have to unlock it now. They have the code it takes to do it. Lots of times car company's did this to prevent stolen stereos from working again once power was cut off. Theifs could'nt get rid of them cause they did'nt work without the code to unlock it.
THERE IS PROCEEDURE TO ACCESS RADIO # THEN CALL IN TO GET UNLOCK
CODE / DEALERS USALLY DO FOR SMALL FEE / THEY GET CHARGED EVERY
TIME THEY ACCESS THIS PHONE # / ONCE UNLOCKED YOU CAN PUT IN YOUR
OWN LOCK/UNLOCK CODE
Hi, my name is Ben. When LOC is displayed on the radio it indicates that power has been shut off to the radio. Probably disconnected the battery during servicing the vehicle. Once this happens, there is a code which must be entered using the buttons on the radio to make the radio able to work again. If you don't know the code, you will need to take the vehicle to a dealership service department and have them unlock the radio. Sorry, I can't help you more, but hopefully you have the information you need now. If you can find the code, sometimes it's written in the owner's manual, I can give you the procedure for entering it into the radio.
shouldnt have to pay notify a chevy dealer in person for code most dealers wont deal with a code problem over phone they dont charge for the code due to the fact that a dead battery can also lock out the radio system into the anti-theft mode
Hello! You have done half of the work already! You can take the code, and the VIN to your vehicle; and call your local GM dealership. Tell them that you need the unlock code for the radio, and they will ask you for that information.
Also - there are 2 modes to the TheftLock - "LOC" or "SEC" and "INOP". Once the anti-theft is activated, the radio display will show "LOC" or "SEC" - you then have 8 attempts to enter your code. If after 8 attempts you don't enter the correct code, the display will change to "INOP". It is only at this time that you will need to wait one hour, with the ignition ON; before you can retry. After that - you will have only 3 attempts before the radio enters "INOP" mode again.
Hello. This is what I need from you to unlock your radio. Press the number 2 and 3 preset button and hold until three numbers apear. Write those numbers down. Press the am/fm button and write those numbers down. Give me those numbers and I will get you the unlock code and directions how to input it.