If you have a Buick Lacrosse.If you're on a tight budget but want a better sounding system in your car,install an aftermarket car stereo yourself! You can remove your old car stereo and install a new one with just a few simple tools and a little hard work. Installing an aftermarket car stereo in Buick Lacrosse yourself also saves you the money you would otherwise pay a professional. This guide explains how to install an aftermarket car stereo in Buick Lacrosse