Visit us online today at www.shenandoahbuickgmc.com or give us a call at (540) 551-4719!br People in and around Manassas VA often ask, what is the premier Jeep dealership around? The answer is always Shenandoah Buick GMC! Shenandoah Buick GMC provides residents with the premier service, selection, prices and all around buying experience when looking for any new or pre-owned Jeep. One trip to Shenandoah Buick GMC and you will see why so many people consider us the premier dealership in the area.