Diesel Truck Repair
Diesel truck repair in Stillwater, Oklahoma.
Foulks Performance diagnoses and repairs Duramax, Powerstroke, and Cummins trucks that still need to tow, pull, commute, and work. Honest diagnosis, real fixes, and no dealership-level runaround on diesel problems.
- Duramax
- Powerstroke
- Cummins
Work-truck focus
Diagnosis first, dependable diesel work after that.
From hard starts and smoke to rebuild decisions and power complaints, Tony works through diesel problems with the same approach he uses everywhere else: identify the real failure, explain the options clearly, and keep the repair aimed at how the truck actually earns its keep.
What's included
Diesel work from diagnosis to dependable.
Diagnosis
Proper diagnosis for loss of power, smoke, hard starts, coolant loss, and other diesel symptoms before parts are ordered.
Duramax repair
Repair and rebuild work on LB7, LLY, LBZ, LMM, LML, and newer Duramax platforms for GM / Chevrolet work trucks.
Powerstroke repair
Ford Powerstroke diagnosis and repair including 7.3L, 6.0L, 6.4L, 6.7L, and related platforms.
Cummins repair
Cummins diesel repair for Ram / Dodge trucks including 5.9L and 6.7L platforms — both everyday fixes and harder-to-find problems.
Full diesel rebuilds
Complete engine rebuilds on diesel platforms for trucks that need more life out of the motor without a full replacement.
Performance work
Diesel performance upgrades, tuning support, and components for trucks that need to tow harder or pull competitively.
Who it's for
Oklahoma diesel owners who need the truck to actually work.
Diesel trucks are expensive to own when they are not running right — especially when shops keep throwing parts at a problem without actually diagnosing it. Foulks Performance starts with real diagnosis, talks through the options, and fixes the actual cause so the truck gets back to doing its job.
- Work trucks that have to tow and pull reliably
- Daily-driver diesels with intermittent problems
- Trucks needing engine rebuild instead of replacement
- Diesels with prior bad repair work that needs sorted
FAQ
Diesel truck questions, answered.
What diesel trucks does Foulks Performance repair?
All major diesel platforms — Duramax (GM / Chevrolet), Powerstroke (Ford), and Cummins (Ram / Dodge). Services include diagnosis, engine repair, and powertrain work.
Can you rebuild a diesel engine?
Yes. Full diesel rebuilds on Duramax, Powerstroke, and Cummins platforms. Rebuilds can target stock reliability or stronger-than-stock work capability.
Signs my diesel truck needs repair?
Loss of power, excessive smoke (black, white, or blue), rough idle, hard starts, coolant loss, oil contamination, fuel knock, and warning lights. Get them diagnosed early before the damage spreads.
Do you work on diesel trucks from out of town?
Yes. The shop commonly works with diesel truck owners from Stillwater, Perry, Cushing, Ponca City, and the surrounding Oklahoma area. Call ahead to coordinate.
Does Foulks Performance handle diesel performance work?
Yes. Performance builds, tuning support, and upgraded components for trucks that need to tow harder, pull, or make more power reliably.
Ready to start
Get your diesel back to work.
Shop details
- Foulks Performance
- 6219 E 68th St, Stillwater, OK 74074
- (405) 714-8364
- tony.foulks@yahoo.com
Common service area
- Stillwater
- Perry
- Cushing
- Ponca City
- Perkins
- Glencoe
- Yale
- Pawnee
- Guthrie
Best next step
Send the quote form with your truck details and symptoms, or call/text Tony directly to talk it through first.