Cadillac Service Center

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About Cadillac Service Center
Hennessy Cadillac in Duluth serves the greater Gwinnett County area, including Lawrenceville, Suwanee, and Buford. The dealership maintains a 4.7-star average across 982 reviews, reflecting consistent service delivery for Cadillac owners throughout the metro area. As an authorized dealership, the facility provides factory-trained technicians and genuine OEM parts for new and pre-owned Cadillac vehicles.
What distinguishes this service center is its commitment to transparent communication throughout the repair process. Unlike many dealerships, customers report receiving video updates from technicians explaining exactly what repairs are needed before work begins. The service advisors also provide complete cost estimates upfront, giving customers authority over which repairs to authorize.
Customers highlight specific team members who made a difference during challenging situations. Kevin Inthavongsa addressed a battery issue with patience and thoroughness, while Soraya kept a customer updated daily on a complex repair that another dealership had misdiagnosed. One reviewer noted their vehicle ran great after the team properly diagnosed an issue previous shops could not fix.
What Customers Say
582 reviewers award the business 4.7 stars, with customers consistently praising transparent pricing and clear communication. Service advisors like Kevin and Soraya receive repeated recognition for keeping customers informed throughout repair processes.
Working Hours
| Sunday | Closed |
| Monday | 7:30 AM–6 PM |
| TuesdayToday | 7:30 AM–6 PM |
| Wednesday | 7:30 AM–6 PM |
| Thursday | 7:30 AM–6 PM |
| Friday | 7:30 AM–6 PM |
| Saturday | 8 AM–3 PM |
Services
New Cadillac Sales
Purchase new XT4 and other Cadillac models with local financing and trade-in options.
Factory Scheduled Maintenance
Oil changes, tire rotations, and multi-point inspections using GM-approved parts and fluids.
Battery Diagnostics & Replacement
Testing, charging system evaluation, and battery replacement for all Cadillac models.
Brake System Service
Pad replacement, rotor resurfacing, brake fluid flush, and ABS diagnostics.
Transmission & Drivetrain Repair
Diagnosis and repair of transmission issues, differential service, and drive shaft maintenance.
Engine Diagnostics & Repair
Check engine light diagnosis, engine repair, and performance tuning services.
Climate Control Service
Heating and cooling system repair, refrigerant recharge, and blower motor service.