The Best GMC Repair in Saint Clair, MI

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

#1

St. Clair Auto Care

4.8
(180 reviews)
Verified

A long-standing, family-owned and operated service center known for its honest diagnostics and high-quality workmanship. They have built a stellar reputation for handling complex repairs on domestic trucks and SUVs, including the full range of GMC services from routine maintenance to advanced diesel and transmission work. Their technicians are ASE Certified and they invest in ongoing training.

1204 S Riverside Ave, Saint Clair, MI 48079

Specialties & Features

EcoTec engine diagnostics
Allison transmission repair
4WD and towing system service

Business Information

Years in Business:25 years
Licensed:Yes
Insured:Yes
#2

Port City Diesel & Auto Repair

4.7
(130 reviews)
Verified

While located just south in Marysville, this shop is a top-tier specialist for GMC owners in the Saint Clair area, particularly for diesel and heavy-duty models. They are a go-to for Duramax performance, diagnostics, and repair. Their expertise is highly focused on the powertrain systems that GMC trucks are known for.

2120 Gratiot Blvd, Marysville, MI 48040

Specialties & Features

Duramax diesel service
Heavy-duty truck suspension
Towing package maintenance

Business Information

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

M-29 Auto & Truck Repair

4.6
(90 reviews)
Verified

Located a short drive north in Port Huron, this shop has a strong reputation for tackling tough jobs on American-made trucks. They offer comprehensive service, from electrical and electronic diagnostics (including Denali features) to transmission rebuilds and suspension work. They are known for their practical expertise and ability to service both older and newer model GMCs.

3949 Lapeer Rd, Port Huron, MI 48060

Specialties & Features

Transmission repair (Allison
10-speed)
Denali luxury features and electronics
General GMC diagnostics

Business Information

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

Why These Are the Top GMC Repair Auto Repair Shops in Saint Clair

** The GMC repair market in Saint Clair, Michigan, and its immediate vicinity (including Marysville and Port Huron) is characterized by a small number of highly competent, independent shops that compete directly with the local GMC dealership. Due to the region's proximity to the St. Clair River and I-94, there is a high concentration of trucks, SUVs, and boats, creating a strong demand for specialists in diesel, transmission, and towing systems. **Average Quality:** The quality is generally high, with several shops boasting decades of experience and master technicians. The competition drives a focus on customer service and technical excellence. **Competition Level:** The market is moderately competitive. While there are not a vast number of shops, the ones that have endured have done so by building a loyal customer base through word-of-mouth and proven results. They compete on specialized expertise rather than just price. **Typical Pricing:** Pricing is competitive with national averages for specialized auto repair. For standard services (oil changes, brakes), prices are reasonable. For specialized work (Duramax injector replacement, Allison transmission overhaul), labor rates are in line with expert-level service, typically ranging from **$120 - $150 per hour**. Customers are generally paying for expertise, particularly for diesel and complex electronic diagnostics, which commands a premium.

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 Saint Clair regulations and climate