To get a precise answer on compatibility and pricing, you should:
* Consult a professional car audio installer: They can diagnose your vehicle and recommend the best remote starter system for your 2011 Buick Regal. This is the best way to ensure compatibility and proper installation.
* Check online retailers: Websites selling car electronics often have compatibility checkers, but these aren't always perfectly accurate. They can give you a general idea of what's available, but professional installation is still highly recommended.
Don't attempt to install it yourself unless you have significant automotive electrical experience. Improper installation can damage your car's electrical system.