1. Turn the ignition OFF.
2. Disconnect the battery negative cable for 1 minute.
3. Reconnect the battery cable.
4. Turn the ignition to RUN.
5. Turn the radio ON.

Does the radio now operate?

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Go to Step 2

Important: The face of the radio will display Theftlock®.

Does the radio have Theftlock®?

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Go to Step 3

Refer to Radio/Audio System Check

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

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Refer to Radio/Audio System Operation

Go to Step 4

1. Turn the ignition OFF.
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 and 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

Go to Step 8

Contact Delco® Assistance to obtain a radio back-up code.

Did you obtain the code?

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Go to Step 6

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1. Use the hours and minutes buttons on radio and install the 4 digit radio back-up code.
2. Depress the AM/FM button.
3. SEC should display.

Did the radio unlock?

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Go to Step 7

Go to Step 6

Important: Step 6 only unlocked the radio, if the original code is not known, repeat step 6. This will remove the original owners code. The owner will then be able to reinstall their own personal security code.

Did the radio display?

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Go to Step 7

Send the radio for repair.

Is the repair complete?

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Go to Radio/Audio System Check

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