I just purchased a 2007 Lucerne CXL. Unfortunetly, is was not equipped
with the upgraded entertainment package (Harmon Kardon system). Is it
possible to upgrade my audio system now that is has left the factory?
Can order the parts through the dealer parts department and simply plug
them in?



Thanks for your help.

there are more then just geting Harmon cardon amp.You'll have to replace speakers as well and possibly radio. and either youreplace radio or not, but when adding harmon cardon amplifier, radio needs to be recalibrated.


aftermarket equipment is best solution for this