Justin Mummey
Justin Mummey at Heritage GMC Buick

Justin Mummey

Service Advisor

Heritage GMC Buick

930 E Interstate 30
Rockwall, TX 75087

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Dealership Inventory (351 Vehicles)

new 2026 GMC Sierra 1500 car, priced at $68,425
2026 GMC Sierra 1500
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new 2026 GMC Sierra 3500 car, priced at $87,030
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new 2026 Buick Encore GX car, priced at $25,665
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