A:AnswerDoes the radio in the Buick a 2 din radio. If yes, I see no problem with the radio fitting in the same spot. May have to purchase the correct bracket
A:AnswerI'm sure you could add a cord and tie it to the usb cord but you'd most likely need an wire extension since there are no inputs in the front and it would just be a matter of time until that cord goes bad.
A:AnswerIt does not. It does have RCA/Component input (Yellow Video, Red and White audio) though. There is also a DVD player and video can be played from an SD Card. The screen isn't 1080p, so HDMI would be no better than the RCA input.
Hope this helps!
A:AnswerNeither, it sounds as if you are overpowering your speakers. Raising the volume on a aftermarket may exceed wattage on factory speaker. If it does overpower speaker, unit turns off for protection.
A:AnswerThis unit is designed to be installed in vehicles with a double DIN installation site. Please refer to your vehicle manual for confirmation of the type you require.