A:AnswerThe KICKER CS 6.5" Coaxial Speakers (https://www.kicker.com/CSC65-Coaxial-Speakers-4-Ohm) will fit in the front doors of the 2004 GMC Sierra but require making or purchasing adaptor plates to fit the specialized factory opening/mounting. The KS 6.5" version from KICKER (https://www.kicker.com/51KSC6504) includes this adaptor plate with the speakers. Please visit KICKER.com for further information on these products and reach out to KICKER Technical Support for any questions you may have before purchasing. You can reach KICKER Technical Support Monday through Friday, 8:00 am to 5:00 pm Central Standard Time, by calling 800-256-0808 or emailing support@kicker.com.
A:AnswerMy car is a 2017 Hyundai Sonata, they would probably fit your car. They did have a custom harness delivered to my house that I had to bring with me for the install. My daughter blew one of the original speakers, these sound so much better!