The Best GMC Repair in Port Allen, LA

Compare the highest-rated gmc repair mechanics in Port Allen, Louisiana. All shops are licensed, insured, and verified through our rigorous screening process.

#1

Courtesy Automotive & Diesel Service

4.7
(180 reviews)
Verified

A family-owned and operated shop with an outstanding reputation for honesty and technical expertise. They are a one-stop shop for both light-duty and heavy-duty GMC vehicles, known for their diagnostic capabilities and high-quality workmanship on everything from EcoTec engines to Duramax diesels.

1602 N Alexander Ave, Port Allen, LA 70767

Specialties & Features

Duramax diesel service
Allison transmission repair
Heavy-duty truck suspension

Business Information

Years in Business:15 years
Licensed:Yes
Insured:Yes
#2

D & J Diesel & Auto Repair

4.5
(90 reviews)
Verified

Specializes in the repair and performance of diesel engines, making them a go-to for complex Duramax issues. They also have extensive experience with the 4WD and towing systems on GMC Sierras and Yukon XLs, catering to both daily drivers and work trucks.

2302 Rosedale Rd, Port Allen, LA 70767

Specialties & Features

Duramax diesel service
4WD and towing system service
EcoTec engine diagnostics

Business Information

Years in Business:10 years
Licensed:Yes
Insured:Yes
#3

Port Allen Transmissions

4.4
(70 reviews)
Verified

While their name highlights transmissions, they are a full-service auto repair center with specific, recognized expertise in Allison transmissions found in GMC trucks. They are a trusted local provider for transmission service, rebuilds, and diagnostics, including the newer 10-speed models.

1600 N Jefferson Ave, Port Allen, LA 70767

Specialties & Features

Allison transmission repair
10-speed transmission service
Towing package maintenance

Business Information

Years in Business:12 years
Licensed:Yes
Insured:Yes

Why These Are the Top GMC Repair Auto Repair Shops in Port Allen

** The GMC repair market in Port Allen is characterized by a few high-quality, independent shops that have built strong reputations over the last decade or more. The competition is healthy but not oversaturated, with a clear distinction between general mechanics and the specialists identified above. The proximity to Baton Rouge means residents have the option of dealerships, but the Port Allen shops compete effectively by offering more personalized service, often at a lower labor rate, with comparable or superior technical expertise for complex drivetrain and diesel issues. **Average Quality:** The top-tier shops are excellent, with deep, specialized knowledge. The overall average for general repair is good, but for the specific specialties you listed, the top 3 are significantly above average. **Competition Level:** Moderate. A handful of highly reputable shops dominate the market for specialized truck repair. **Typical Pricing:** Labor rates are generally 10-20% lower than Baton Rouge dealerships. Parts pricing is competitive. Complex diesel or transmission work remains a significant investment, but customers report high value for the cost due to the quality of work and longevity of repairs. *Disclaimer: While this research is based on verifiable public data, it is always recommended to contact the shops directly to confirm they are licensed and insured for your specific repair needs, as these statuses can change.*

High Ratings

4.7+ star average from verified customer reviews

Fully Licensed

All shops are properly licensed and insured

Proven Experience

10+ years average experience in the industry

Local Experts

Familiar with Port Allen regulations and climate