Need more information - is only the brake lights on? Do the tail lights and turn signal function OK? If yes, then suspect the brake light switch at the brake pedal arm - up underneath the instrument panel.
The parts are readily available from these many on-line sources, www.partsgeek.com, www.rockauto.com, www.discountautoparts.com, www.autopartswarehouse.com, www.jcwhitney.com - to list only a few possibilities.
In fact, they (RockAuto) list the brake light switch from around $14.80 for your vehicle. Very easy replacement - reference the 'How-To-Guides' on the AutoMD website.