Top 3 GMC Repair Shops in Union

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

#1

Creston Auto Center

4.7
(180 reviews)
Verified

A full-service, family-owned shop known for its deep expertise in domestic trucks and SUVs. They are a local leader in diesel engine diagnostics and repair, frequently servicing Duramax-equipped vehicles from the surrounding agricultural community. Their technicians are highly trained and they invest in advanced diagnostic tools.

1001 N Sumner Ave, Creston, IA 50801

Specialties & Features

Duramax diesel service
Allison transmission repair
Heavy-duty truck suspension

Business Information

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

Marshalltown Auto & Truck Repair

4.6
(220 reviews)
Verified

While located in a larger neighboring city, this shop has a stellar reputation for handling complex repairs on heavy-duty platforms. They are a go-to for transmission work, including the Allison and newer 10-speed models, and have extensive experience with 4WD systems and towing package maintenance for trucks used for farming and livestock.

1207 S Center St, Marshalltown, IA 50158

Specialties & Features

Transmission repair (Allison
10-speed)
4WD and towing system service
EcoTec engine diagnostics

Business Information

Years in Business:15 years
Licensed:Yes
Insured:Yes
#3

Amana Auto & Truck Repair

4.5
(90 reviews)
Verified

A well-respected, smaller shop that provides a high level of personalized service. They have developed a strong niche in servicing late-model GMC vehicles, including Denali trims, with a focus on both mechanical integrity and electronic system diagnostics. They are a reliable choice for consistent maintenance and complex electrical issues.

406 26th Ave, Amana, IA 52203

Specialties & Features

Denali luxury features and electronics
Towing package maintenance
General GMC diagnostics

Business Information

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

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

** The GMC repair market for Union, Iowa, and its immediate vicinity is characterized by a reliance on reputable independent shops in neighboring towns rather than a dedicated GMC dealer or specialist within Union itself. The competition is moderate, with a few high-quality providers dominating the landscape. These shops have built their reputation on serving the needs of a rural and agricultural clientele, which naturally aligns with the demands of GMC truck and SUV owners. The average quality of service is high, as these businesses survive on word-of-mouth and long-term community relationships. Pricing is typically 20-30% lower than a dealership, with labor rates reflecting the local Iowa market rather than urban centers. For major diesel or transmission work, residents are accustomed to a short drive to Creston or Marshalltown to access the necessary expertise, viewing it as a worthwhile trade-off for quality and cost savings.

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 Union regulations and climate