Justin Mummey
Justin Mummey at Heritage GMC Buick

Justin Mummey

Service Advisor

Heritage GMC Buick

930 E Interstate 30
Rockwall, TX 75087

Contact Me
5.0
18 Reviews
5.0

18 Reviews

Write a Review

18 Reviews of Justin Mummey

April 22, 2026

Dealership Rating
Employee Rating

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

by SW23
Service Price Transparency
Workmanship
Service Time
Service Communication
Recommend Dealer
Yes

April 18, 2026

Dealership Rating
Employee Rating

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

by DAVECHARDAB
Service Price Transparency
Workmanship
Service Time
Service Communication
Recommend Dealer
Yes

Other Employees Tagged: Shawn Waara, Michael Jordan

April 17, 2026

Dealership Rating
Employee Rating

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

by PAULRIOS62
Service Price Transparency
Workmanship
Service Time
Service Communication
Recommend Dealer
Yes

April 17, 2026

Dealership Rating
Employee Rating

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

by JOE@FRANKINSURANCE.NET
Service Price Transparency
Workmanship
Service Time
Service Communication
Recommend Dealer
Yes

April 08, 2026

Dealership Rating
Employee Rating

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

by TTUMULTY77
Service Price Transparency
Workmanship
Service Time
Service Communication
Recommend Dealer
Yes

March 24, 2026

Dealership Rating
Employee Rating

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
Service Price Transparency
Workmanship
Service Time
Service Communication
Recommend Dealer
Yes

March 17, 2026

Dealership Rating
Employee Rating

Everything went smoothly without a hitch and was a super smooth experience. Fast as well! More

by h3rminator
Service Price Transparency
Workmanship
Service Time
Service Communication
Recommend Dealer
Yes

March 14, 2026

Dealership Rating
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

Dealership Rating
Employee Rating

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

by opheliaortiz
Service Price Transparency
Workmanship
Service Time
Service Communication
Recommend Dealer
Yes

Other Employees Tagged: Michael Jordan

March 05, 2026

Dealership Rating
Employee Rating

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

by napszone
Service Price Transparency
Workmanship
Service Time
Service Communication
Recommend Dealer
Yes
1

Dealership Inventory (361 Vehicles)

new 2026 GMC Yukon car, priced at $94,190
2026 GMC Yukon
new
Titanium Rush Metallic exterior
Automatic
Rear-wheel Drive
new 2026 GMC Sierra 1500 car, priced at $67,425
2026 GMC Sierra 1500
new
Sterling exterior
Automatic
Four-wheel Drive
new 2026 Buick Encore GX car, priced at $24,300
2026 Buick Encore GX
new
Brilliant Red exterior
CVT
Front-wheel Drive
new 2026 GMC Sierra 1500 car, priced at $67,825
2026 GMC Sierra 1500
new
Sterling exterior
Automatic
Four-wheel Drive
new 2026 GMC Sierra 1500 car, priced at $63,630
2026 GMC Sierra 1500
new
Summit White exterior
Automatic
Four-wheel Drive
new 2026 Buick Envision car, priced at $46,929
2026 Buick Envision
new
Brilliant Red exterior
Automatic
All-wheel Drive