CARFAX One-Owner. 2019 Ford F-150 XLT Agate Black Metallic Odometer is 14562 miles below market average! At Patriot Buick-GMC, we have the best selection of used and GM -Certified preowned vehicles. Conveniently located at the intersection of routes 100 & 73. We are one of the best dealerships, serving Allentown, Reading and Pottstown.