1998 Buick Riviera Owner's Manual

Activating the Theft-Deterrent FeatureThe instructions which follow explain how to enter yoursecret code to activate the THEFTLOCK system. It isrecommended that you read through all nine stepsbefore starting the procedure.NOTE: If you allow more than 15 seconds to elapsebetween any steps, the radio automatically reverts totime and you must start the procedure over at Step 4.1. Write down any three or four-digit number from000 to 1999 and keep it in a safe place separate fromthe vehicle.2. Turn the ignitjon to ACCESSORY or RUN.3. Turn the radio off.4. Press the 1 and 4 buttons together. Hold them downuntil --- shows on the display. Next you will use thesecret code number which you have written down.5. Press MIN and 000 will appear on the display.6. Press MIN again to make the last two digits agreewith your code.7. Press HRS to make the first one or two digits agreewith your code.8. Press AM-FM after you have confirmed that thecode matches the secret code you have written down.The display will show REP to let you know that youneed to repeat Steps 5 through 7 to confirm yoursecret code.9. Press AM-FM and this time the display will showSEC to let you know that your radio is secure.Unlocking the Theft-Deterrent Feature After aPower LossEnter your secret code as follows; pause no more than15 seconds between steps:1. LOC appears when the ignition is on.2. Press MIN and 000 will appear on the display.3. Press MIN again to make the last two digits agreewith your code.4. Press HRS to make the first one or two digits agreewith your code.5. Press AM-FM after you have con€irmed that thecode matches the secret code you have written down.The display will show SEC, indicating the radio isnow operable and secure.3-16