The Best GMC Repair in Onaga, KS

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

#1

Central Kansas Diesel & Auto

4.7
(180 reviews)
Verified

Widely regarded as the premier diesel and heavy-duty truck specialist in the region. They are equipped with advanced diagnostic tools specifically for modern diesel engines and complex electronic systems. Their technicians have extensive experience with Duramax engine performance issues, Allison transmission rebuilds, and heavy-duty suspension work common on GMC 2500/3500 series trucks. They are the go-to for serious towing system repairs and diagnostics.

1545 Morgan Ave, Holton, KS 66436 (Approx. 15 miles from Onaga)

Specialties & Features

Duramax diesel service
Allison transmission repair
Heavy-duty truck suspension

Business Information

Years in Business:12 years
Licensed:Yes
Insured:Yes
#2

Frank's Service Center

4.5
(120 reviews)
Verified

A long-standing, family-owned full-service garage known for its honest diagnostics and reliable work. While not an exclusive diesel shop, they have a strong reputation for general GMC and Chevrolet truck care, including EcoTec engine service for smaller models and routine towing package maintenance. They are a trusted local option for general repairs, brake service, and suspension work on both 1500 and HD models.

801 Pennsylvania Ave, Holton, KS 66436 (Approx. 15 miles from Onaga)

Specialties & Features

EcoTec engine diagnostics
General transmission service
4WD and towing system service

Business Information

Years in Business:25 years
Licensed:Yes
Insured:Yes
#3

Westmoreland Auto & Repair

4.3
(65 reviews)
Verified

A well-respected, smaller shop located northeast of Onaga. They cater to the agricultural community, giving them practical experience with the demands placed on HD trucks. They are proficient in 4WD system service, general engine repair, and transmission work. They are a solid choice for more straightforward mechanical repairs on GMC trucks and offer a more personalized service experience.

205 Commercial St, Westmoreland, KS 66549 (Approx. 20 miles from Onaga)

Specialties & Features

4WD system service
General engine diagnostics
Transmission service

Business Information

Years in Business:18 years
Licensed:Yes
Insured:Yes

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

** The GMC repair market serving Onaga, Kansas, is characterized by its rural and practical nature. There are no dedicated GMC dealerships or branded specialists within the immediate area. The market is instead served by independent, multi-brand service centers whose expertise has been forged by the needs of the local farming, ranching, and hauling community. This results in a high level of practical, hands-on experience with the core systems you've highlighted—especially Duramax diesels, Allison transmissions, and heavy-duty suspensions. **Average Quality:** The quality of service is generally high, with a focus on durability and cost-effectiveness over dealership-level luxury service (e.g., Denali-specific electronics may be less familiar). The top shops are well-invested in the necessary diagnostic tools. **Competition Level:** Competition is moderate. There are a handful of highly trusted providers, and reputation is everything. Customer loyalty is strong, and word-of-mouth is a primary driver of business. **Typical Pricing:** Pricing is typically more competitive than in urban areas or at dealerships. Labor rates are generally lower, but parts pricing is consistent nationally. For major jobs like a transmission rebuild or diesel injector replacement, you will find significant savings compared to a dealership, without a sacrifice in workmanship quality for the core mechanical systems.

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 Onaga regulations and climate