The Best GMC Repair in Harriston, MS

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

#1

Cook's Garage & Diesel Service

4.7
(180 reviews)
Verified

A family-owned and operated business with a legacy of trust in the McComb area. They are widely recognized as the leading independent specialist for GM diesel and transmission work. Their technicians have deep, hands-on experience with the full range of GMC trucks, from heavy-duty Duramax models to Denali trims, and they invest in specialized diagnostic tools for modern GM systems.

1205 Delaware Ave, McComb, MS 39648

Specialties & Features

Duramax diesel service
Allison transmission repair
heavy-duty suspension

Business Information

Years in Business:70 years
Licensed:Yes
Insured:Yes
#2

Phelps GM Superstore Service Center

4.4
(250 reviews)
Verified

As the official GMC dealership for the region, this is the premier destination for factory-trained technicians, genuine GM parts, and complex electronic/warranty work. They are the best-equipped facility to handle advanced diagnostics on Denali luxury features, EcoTec engines, and factory towing systems, ensuring repairs meet OEM standards.

1400 Veterans Blvd, Jackson, MS 39213

Specialties & Features

Denali electronics
EcoTec engine diagnostics
factory towing package maintenance

Business Information

Years in Business:45 years
Licensed:Yes
Insured:Yes
#3

B&B Automotive & Transmission

4.5
(120 reviews)
Verified

A highly-rated independent shop known for its expertise in complex transmission rebuilds and 4WD system service. They are a trusted alternative for major drivetrain work, particularly on Allison transmissions and transfer cases. Their reputation for honest diagnostics and quality workmanship makes them a go-to for GMC owners needing transmission or 4WD repairs.

805 Broadway Dr, Tylertown, MS 39667

Specialties & Features

Allison transmission repair
4WD system service
general GMC diagnostics

Business Information

Years in Business:20 years
Licensed:Yes
Insured:Yes

Why These Are the Top GMC Repair Auto Repair Shops in Harriston

** The GMC repair market for Harriston, Mississippi, and its immediate surrounding counties (Pike, Walthall) is characterized by a reliance on a few highly specialized providers rather than a high volume of general mechanics. Due to Harriston's rural nature, residents are accustomed to traveling short distances (15-30 miles) to neighboring towns like McComb, Tylertown, or even Jackson for expert service. **Average Quality:** The quality of service is polarized. While there are many general mechanics, true specialists for complex systems like Duramax diesel or Allison transmissions are limited to the top-tier shops listed. These specialists maintain a very high standard to compete with the dealership, often providing more personalized service and sometimes more competitive pricing. **Competition Level:** Competition is moderate but specialized. The dealership (Phelps) holds a monopoly on factory-certified work, while independent shops like Cook's Garage and B&B Automotive compete fiercely on reputation, price, and specific technical expertise (e.g., diesel performance, transmission rebuilding). There is little direct competition for these high-skill services. **Typical Pricing:** Labor rates are generally lower than in major metropolitan areas. Expect to pay: * **Independent Specialists (Cook's, B&B):** $95 - $120/hour * **Dealership (Phelps):** $130 - $150/hour While the dealership commands a premium, their access to proprietary software and training for electronics and complex modules can be necessary for certain repairs, providing value that justifies the cost.

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 Harriston regulations and climate