Models: 2006-2007 Buick Lucerne 2006-2007 Cadillac DTS 2006-2007 Chevrolet Impala, Monte Carlo 1. Replace the RCDLR module and the RCDLR antenna using the following procedure: Impala / Monte Carlo DTS • DTS / Lucerne: 5/1/07 • Impala / Monte Carle: 3/1/07 • The 2006 and 2007 Impala LS without AP8 does not have a coax antenna. • The 2006 and 2007 Lucerne without AP3 or AP8 does not have a coax antenna. 1.1. Remove the driver’s side “A” pillar molding and I/P closeout panel. 1.2. Unplug the speaker. 1.3. To expose the RCDLR antenna, partially remove the driver’s side upper I/P closeout panel (near windshield). 1.4. Remove the clips holding the RCDLR antenna wire at the RCDLR module and along the “A” pillar. 1.5. Cut the old RCDLR antenna wire a minimum of 152 mm (6 in) from the button (connecting to the windshield), leaving that portion of the old RCDLR antenna connected to the windshield. 1.6. Remove the I/P carrier bolt and remove the old RCDLR antenna. 1.7. Remove the RCDLR module. 1.8. Install the new RCDLR module. 1.9. Lay in the new RCDLR antenna and reinstall the carrier bolt. 1.10. Connect the new antenna to the RCDLR antenna module. 1.11. Clip the new RCDLR antenna into place using the existing holes on the “A” pillar. 1.12. Reinstall the I/P close-out panel. 1.13. Reconnect the speaker wire. Important: Be sure that the end of the old RCDLR antenna is tucked behind the “A” pillar molding. The button on the windshield is no longer functional, however leaving the cover on the button will provide a cleaner look to the vehicle. 1.14. Reinstall the “A” pillar molding and I/P side closeout panel. 1.1. Remove the rear seat cushion. 1.2. Remove the rear seat back.