Vanguard GMC of Carrollton - DFW's first exclusive GMC Dealer Vanguard GMC is a part of the Vanguard Auto Group. We are a multi generation family owned and operated dealership. We work daily to offer large selection of new GMCs and preowned vehicles. We have a comfortable atmosphere and a friendly staff. Our service department is available 6 days a week to help you with any maintenance or repair on most GM vehicles. Vanguard GMC 100% Texan - 100% GMC - 100% Vanguard