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
22 Reviews
5.0

22 Reviews

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22 Reviews of Justin Mummey

May 14, 2026

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Fast service. Friendly staff. No issues once I got in. Took multiple tries before someone answered phone. More

by tonyastinshack
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Recommend Dealer
Yes

May 02, 2026

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Always top notch service. Always! You never feel like you’re at an ordinary dealership, from purchase to service. Best out there. More

by jwnew41217
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Recommend Dealer
Yes

May 01, 2026

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Great GMC Team to work with. Sales and Service dept both top notch staffs. Always willing and able to work with customer More

by danny.c.crow
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Recommend Dealer
Yes

Other Employees Tagged: Robert Bobo, Brad Tittle , Shawn in sales

April 28, 2026

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Great experience. Would recommend in future to friends and colleagues. Prompt. Knowledgeable and very helpful. More

by LANG4TX
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Recommend Dealer
Yes

April 22, 2026

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Great customer Service, Justin took good care of me. I was in and out within a hour. More

by SW23
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Recommend Dealer
Yes

April 18, 2026

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But customer first. Keep you informed of happenings with vehicle. Just make it easy for the customer. More

by DAVECHARDAB
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Recommend Dealer
Yes

Other Employees Tagged: Shawn Waara, Michael Jordan

April 17, 2026

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Great personnel and great service makes for a great performance..,I will recommend to all my friends More

by PAULRIOS62
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Yes

April 17, 2026

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Justin was able to get my truck in quickly and serviced in an hour as promised. More

by JOE@FRANKINSURANCE.NET
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Recommend Dealer
Yes

April 08, 2026

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Great service. Repairs were done correctly and in an acceptable timeframe. Justin kept me informed throughout the entire process. More

by TTUMULTY77
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Recommend Dealer
Yes

March 24, 2026

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This dealership always finds a way to work around my schedule to get me in for service. Everyone I have worked with at this dealership has be professional and honest. More

by GSWIAT
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Recommend Dealer
Yes
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