Delco radio unlock - Chevy Impala SS Forum
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post #1 of 5 (permalink) Old 05-12-2002, 10:09 PM
brick b-body
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Ok, I admit I'm weird [img]8.gif[/img] I like Delco headunits.

I'm considering purchasing a used Delco radio with theftlock. If the radio isn't locked, I'm ok. If it is locked I've got a problem

I know how to get the scrambled unlock code, but don't know how to use it. Is anyone able to unlock a radio using this scrambled lock code? I know of NAISSO and dealerships doing this. I'm not a member of NAISSO and dealerships out here charge you just to talk to them.
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post #2 of 5 (permalink) Old 05-12-2002, 10:38 PM
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In order to properly restore your radio to operation you must first obtain the scrambled back-up code from the radio.
1. Turn ignition on and radio power on.

2. Press and hold presets 2 and 3 for about 6 seconds until the first 3 digits of the display code are displayed. Write the numbers down.

3. Press the AM/FM button, and the second 3 digits of the scrambled code are displayed. Write these numbers down. If the numbers do not change when pressing the AM/FM buttons, then your second three numbers are the same as the first three.

4. Fax me (FAX 1-888-995-9496) your name, your 6 digit code and your naisso member number. I will also need your daytime phone number to call you back to confirm. I will call GM and retreive an unlocking code, which only takes a few minutes. The reason I limit this to members is that I know most of you by name and this will limit the chances of anyone with a stolen radio from contacting me.

Once you receive your four digit unlock code from me do the following:
1. Ignition on, Radio OFF.

2. Press the HR button until the "LOC" disappears and "000" appears on the display.
Note: if the display does not change from "LOC" to "000" the unit is probably in the "InOP" stage and must be left alone for one hour with ignition power applied. Every three unsuccessful entries will put the unit into "InOP".

3. Set the first two digits (01-19) of the code with the HR (hours) button. (you will not see the zero if the first digit is a zero as in "02" for example)

4. Set the next two digits (00-99) of the code with the MIN (minute) button.

5. Press the AM/FM button to enter the code. The radio will now be unlocked and the display will change to the clock. Continue with the following steps to deactivate the theft deterrent.

6. Press the HR button until the display changes to "000".

7. Repeat steps 3-5 above to remove the previous code and deactivate the theft deterrent system. You may set a new personal security code as per your owners manual instructions.

Thank you and I hope this is helpful to you,
Troy Willrick @ NAISSO.
post #3 of 5 (permalink) Old 05-14-2002, 02:10 AM
brick b-body
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Where can I go aside from NAISSO or a dealership with the scrambled 6-digit back-up code? Is anyone able to get the 4-digit unlock code if I provide the need information?
post #4 of 5 (permalink) Old 05-18-2002, 09:13 AM
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I love those Delco head units also No, probably not, you will need to talk to someone who knows all about that type of system. So unless you know a GM tech, you are SOL. I don't think it costs too much f/m the dealership. Also, I've purchased 2 Theftlock units and both were unlocked
post #5 of 5 (permalink) Old 05-22-2002, 05:42 PM
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I went to a local dealer service dept and they called and got it for me in like 15 seconds, zero fuss, no questions asked.
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