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Claim This BusinessDenali Diesel operates as a mobile diesel repair specialist serving Terrell, Texas and surrounding communities including Rockwall, Forney, and the greater Kaufman County area. Founded and operated by Addison, the business provides 24-hour emergency service seven days a week with a current rating of 4.8 stars from 42 verified customer reviews. Specialized exclusively in diesel-powered vehicles, Denali Diesel handles passenger trucks, heavy-duty pickups, and commercial diesel applications with a focus on OEM and aftermarket component repairs.
What distinguishes Denali Diesel from conventional repair shops is their fully mobile operations model. Addison travels directly to customer locations throughout the service area, performing repairs on-site whether the vehicle is stranded roadside or parked at the customer's home. This eliminates the need for towing and gets operators back operational faster. The shop maintains 24/7 availability including weekends and holidays, ensuring diesel owners have access to emergency repairs regardless of when breakdown situations occur.
Customer reviews highlight specific scenarios demonstrating Addison's approach. Kevin Bryan described being stranded two hours from Rockwall and receiving a roadside injector replacement followed by an escort back home. Mike Yates noted after-hours and weekend availability for troubleshooting guidance on his 6.7 Cummins performance build. Ronnie Smith's review detailed discovery of prior substandard work causing turbo failure, with Addison addressing additional discovered issues during the same service visit. These accounts reflect responsive, customer-focused service combined with technical expertise on modern diesel powerplants.
Seven of seven detailed reviews assign perfect 5-star ratings, praising Addison personally by name. Four reviewers specifically mention affordability, contrasting expensive dealership quotes with Denali Diesel's fair pricing. Zero negative reviews appear in the dataset, with customer sentiments centered on honesty, diagnostic skill, and mobile convenience.
| Sunday | Open 24 hours |
| Monday | Open 24 hours |
| Tuesday | Open 24 hours |
| Wednesday | Open 24 hours |
| Thursday | Open 24 hours |
| FridayToday | Open 24 hours |
| Saturday | Open 24 hours |
On-site repair services at customer locations, eliminating need for tow truck transport to a physical shop facility.
Diagnosis, replacement, and repair of fuel injectors including common rail injection system components.
OEM and aftermarket turbo replacement for light-duty diesel pickups and heavy-duty applications.
Computerized diagnostic services identifying precise failure causes before repairs commence.
Upgrades and performance enhancement work for diesel powerplants including tuning and aftermarket components.
24-hour breakdown response including evenings, weekends, and holidayperiods throughout the service area.