Compare the highest-rated gmc repair mechanics in Grand Coulee, Washington. All shops are licensed, insured, and verified through our rigorous screening process.
As the primary full-service automotive shop in Grand Coulee, Coulee Automotive is the go-to local option for general maintenance and repairs on GMC trucks and SUVs. They are known for their honest diagnostics and ability to handle a wide range of issues, from EcoTec engine check lights to brake and suspension work on heavy-duty models. For highly complex Duramax or Allison transmission issues, they may sublet to or recommend specialists in larger nearby cities.
Located in the larger hub of Moses Lake, Geraghty's is a highly respected family-owned shop that is the top-recommended specialist for the Grand Coulee area. They possess significant expertise in diesel performance and repair, making them a premier choice for Duramax service. Their technicians are skilled with Allison transmissions, 4WD systems, and the demands of heavy-duty towing, serving an agricultural and lakeside community that relies on robust trucks.
Also based in Moses Lake, C&G Auto Service has built a strong reputation for professional and reliable service on domestic trucks and SUVs. They receive consistently high marks for their diagnostic capabilities, including modern engine computers and electronic systems found in GMC Denali models. They are a excellent choice for transmission service, 4WD troubleshooting, and general engine repair on both gas and diesel platforms.
** The GMC repair market serving Grand Coulee, Washington, is characterized by a "hub-and-spoke" model. Within the city itself, residents have access to a single, reputable general mechanic (Coulee Automotive) for routine maintenance and less complex repairs. This shop provides an essential service but lacks the specialized equipment and certification for deep-level diagnostics on advanced systems like Duramax emissions or Denali electronics. For specialized needs, the market heavily relies on providers in Moses Lake, approximately a 35-minute drive away. Moses Lake acts as the commercial and automotive service hub for the entire region, including Grand Coulee. The competition here is stronger, leading to higher overall quality and specialization. Shops like Geraghty's and C&G Auto Service have developed niche expertise specifically to serve the needs of owners of heavy-duty trucks, boats, and RVs common to the area. **Typical Pricing:** Labor rates are competitive. In Grand Coulee, expect rates around **$110 - $130/hour**. In Moses Lake, for specialized diesel and transmission work, rates are higher, typically ranging from **$140 - $165/hour**. The quality of work and depth of expertise in Moses Lake generally justifies the premium for complex jobs. Customers should expect a significant cost difference between a standard oil change and a Duramax injector replacement or Allison transmission overhaul.
4.7+ star average from verified customer reviews
All shops are properly licensed and insured
10+ years average experience in the industry
Familiar with Grand Coulee regulations and climate