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
11 Reviews
5.0

11 Reviews

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11 Reviews of Justin Mummey

March 14, 2026

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Employee Rating

Justin took care of business. Had me in and out. He greeted me at the door and carried himself with all professionalism. Great job sir. More

by christopher.gardner0
Recommend Dealer
Yes

March 10, 2026

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The dealership has been wonderful all the times I’ve been there and of course Justin has been awesome great guy More

by opheliaortiz
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Recommend Dealer
Yes

Other Employees Tagged: Michael Jordan

March 05, 2026

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Justin took good care of. Took his time in answering my question I had about my truck. Great service. More

by napszone
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Yes

February 10, 2026

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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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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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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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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
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