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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5.0
8 Reviews
5.0

8 Reviews

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8 Reviews of Justin Mummey

February 10, 2026

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Employee Rating

Hands down the best people to work with and they truly care about the customer. It’s not just another job to them with the care they provide to you. More

by bursonmakayla05
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Recommend Dealer
Yes

January 31, 2026

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Always really great bunch of guys. My vehicle was serviced and ready for pickup just as promised. Thank you More

by Cheri
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Recommend Dealer
Yes

January 17, 2026

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Very good customer service and professional care. Always friendly greetings and quick response for service. More

by GWC3263
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Recommend Dealer
Yes

Other Employees Tagged: Steve Tolliver

January 02, 2026

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Friendly and accommodating with performing service. Pleasant service representatives who are helpful to provide understanding of questions I had. More

by jdwallac1956
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Recommend Dealer
Yes

December 30, 2025

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Great service everyone very helpful love my car you guys are the best thanks Happy New Year More

by debanks77
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Recommend Dealer
Yes

December 23, 2025

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Friendly service. Work performed timely with expected quality. Recommend Heritage for your service and sales need. More

by mattoleksy
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Recommend Dealer
Yes

December 13, 2025

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I appreciate the work that was done on my Buick. They took care of the problem with my tire in a timely manner. More

by ralford0
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Recommend Dealer
Yes

December 02, 2025

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Justin has amazing customer service! ! He was so polite and made sure my car got right in and that everything that needed done got done. He’s a great asset to your service dept. More

by TYLER@LONESTARTRANSFER.COM
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Recommend Dealer
Yes

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