Cadillac Seville anti-theft issue with service airbag warning and PRND123 lights flashing on Cadillac Seville

Some Cadillac Seville owners report experiencing anti-theft issues that include a service airbag warning and flashing PRND123 lights. These problems may stem from the anti-theft system using raised-chip keys, which can prevent the car from starting. Additionally, the service airbag warning could indicate a malfunction in one of the Supplemental Restraint System components. The flashing PRND123 lights might signal a fault in the vehicle's system, potentially linked to the anti-theft or airbag issues. Owners have also noted that Diagnostic Trouble Codes (DTCs) such as B1009, B2734, and B2947 may be triggered, pointing to specific vehicle problems. If the airbag system requires attention, a message may appear on the instrument panel, advising owners to seek service from their dealer. It is essential for owners to address these issues promptly to ensure their vehicle operates safely and effectively.