1. Turn the ignition off.
2. Disconnect the negative battery cable for 1 minute.
3. Reconnect the battery cable.
4. Turn the ignition to run.
5. Turn the radio on.

Does radio now operate?

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Go to Step 2

Important: It will say Theftlock® on the face of the radio.

Does the Radio have Theftlock?

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Go to Step 3

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Is it possible to get the security code from the customer?

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Go to Radio/Audio System Operation

Go to Step 4

1. Turn the ignition on.
2. Turn the radio off.
3. Depress and hold Pre-set buttons 2 and 3.
4. Write down the first three digits that appear on the radio display.
5. Depress AM/FM, write down the second three digits that appear on the radio display.

Did you receive the 6 digit Radio Display Code?

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Go to Step 5

Send Radio in for repair

Contact Delco Assistance to obtain a "Radio Back-up Code".

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Go to Step 6

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1. Use the hours and minutes buttons on the radio and install the 4 digit "Radio Back-up Code".
2. Depress the AM/FM button.

"SEC" should display.

Did the radio unlock?

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Go to Step 7

Repeat Step 6

Important: This will remove the original owner's code. The owner will then be able to reinstall their own personal security code.

Step 6 only unlocked the radio, if the original code is not known, repeat step 6.

Did the radio display?

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Repeat Step 7