Most independent shops won't touch a diesel engine. We've been working on them for years — Powerstroke, Cummins, Duramax, and modern light-duty diesels. Real diesel repair, factory-grade tools, and honest pricing right here on Silas Creek Parkway.
A long-haul driver brought us his F-250 Powerstroke last winter — local Ford dealer wanted three weeks for a fuel injector job, and the small shops he called either wouldn't touch a diesel or said they'd "try." We had it diagnosed the next morning and back on the road in five days. That's the gap we fill: real diesel work, dealer-level diagnostics, without the dealer wait or the dealer bill.
Twin City Automotive provides diesel repair Winston-Salem and Forsyth County drivers can trust with their work trucks. We service light-duty diesel pickups, commercial diesels, and modern diesel engines — Powerstroke, Cummins, Duramax, VW TDI, Mercedes BlueTEC. Every job at our Hanes Mall area shop, with the right tools and the right diagnostic software for each platform.
If your diesel is due for service, throwing codes, blowing smoke, losing power, or dealing with DPF/emissions issues, bring it in. We'll diagnose it properly and walk you through what your truck actually needs before any work begins.
Drop the car off and we'll get you where you need to go in Winston-Salem.
Can't make business hours? Use the drop box anytime and we'll get to it next morning.
Synchrony, Snap, Koalafi & more — get the work done today.
Got a quote elsewhere? We'll give you an honest second look at no cost.
From routine maintenance to full diagnostic and repair work, our shop has the diesel-specific tools and the platform-specific training to keep your truck working hard.
Modern diesels last a long time when they're maintained on schedule. We handle diesel oil changes (with the right viscosity and certification), fuel filter replacement, water separator service, air filters, and full inspection at every interval.
Lost power? Hard starts? Black or white smoke? Diesel codes? We diagnose and repair fuel system issues, turbo problems, glow plug failures, EGR faults, sensor faults, and the bigger jobs too. Powerstroke, Cummins, Duramax — all platforms.
Diesel fuel systems run at extreme pressure and tight tolerances. We service injectors, high-pressure fuel pumps, fuel rails, and fuel filter assemblies. We also handle fuel contamination cleanups when bad fuel takes out the system.
Whining, lack of boost, oil consumption, or boost-related codes? Turbos are wear items on diesels. We inspect the turbo, intercooler, intake piping, and boost sensors — and rebuild or replace when needed.
Modern diesels have DPF (diesel particulate filter), EGR, and DEF systems that all need maintenance and occasionally repair. We handle DPF regeneration, EGR cleaning and replacement, and DEF system diagnostics — done right, done legal.
Diesels need diesel-specific scan tools to read every code. We have the factory-grade software for Ford Powerstroke, Cummins, and Duramax — plus VW TDI and Mercedes BlueTEC. We also help diagnose tune-related issues on modified trucks.
Diesels are tough — but they tell you when something is wrong. If any of these match what you're seeing or hearing, schedule a diagnostic before the small problem becomes a big one.
Usually too much fuel or not enough air — bad injectors, dirty air filter, EGR fault, or boost leak. Don't ignore it. Black smoke means fuel is getting wasted and emissions equipment is taking a beating.
White means fuel isn't burning fully (cold engine, bad glow plugs, low compression). Blue means you're burning oil. Both warrant a diagnostic before they get worse.
Glow plugs, fuel system pressure, battery condition, or compression issues. Diesel hard-starts almost always have a fixable cause — and they get worse, not better, over time.
Failing turbo, clogged fuel filter, EGR valve stuck, DPF blocked, or fuel system pressure low. All show up as a truck that won't pull like it used to.
Modern diesels have multiple emissions warnings. Some let you keep driving for a while. Others will put your truck into limp mode. Don't wait — bring it in as soon as the light comes on.
Turbo bearings or boost leaks. The earlier you catch a turbo issue, the cheaper it is to fix. Wait too long and the turbo can fail catastrophically.
Every job we do is covered by the TechNet 3 Year / 36K Mile Nationwide Warranty, including roadside assistance and road hazard. If something goes wrong, you're covered at thousands of shops across the country — not just ours.
TechNet Protection PlanWe're parked on Silas Creek Parkway, a few minutes from Hanes Mall. Diesel owners across Forsyth County and the greater Triad bring their trucks to us because there are very few independent diesel shops in the area — and the dealer wait times can stretch for weeks. We get diesel work done quickly and properly, with the right tools for each platform.
If you're outside Winston-Salem, you can still get to us easily — our diesel customers drive in from across the area:
The questions Forsyth County diesel owners ask us most when their trucks need service or stop running right.
Light-duty diesel pickups — Ford Powerstroke (6.0, 6.4, 6.7), Cummins (5.9 and 6.7), and GM Duramax (LB7, LLY, LBZ, LMM, LML, L5P). We also handle modern car and SUV diesels including VW TDI and Mercedes BlueTEC. Heavy-duty commercial diesels — call us with your application and we'll let you know.
Most jobs run meaningfully less than dealer pricing — sometimes hundreds less on a single repair. The bigger savings come from labor rates and from us not pushing unnecessary work. Every job gets a written estimate before any wrench turns.
Modern diesels need less frequent service than gas engines, but the service intervals are real. Diesel oil changes, fuel filter replacement, water separator drains, and air filters all have specific intervals — usually every 7,500 to 10,000 miles depending on platform and use. We'll set up a maintenance schedule for your truck.
The diesel particulate filter is asking for a regeneration cycle. Sometimes a long highway drive will trigger an active regen and clear the light. If it doesn't, or if the light keeps coming back, the DPF may need a forced regen, cleaning, or in some cases replacement. Bring it in before the truck goes into limp mode.
Yes, but with full transparency. Tunes can hide and cause problems, and emissions deletes are not legal in NC. We'll diagnose what's going on, tell you straight what we see, and we'll work on the truck — but we have to follow emissions law on what we install or remove.
It depends on the job. A diagnostic and most service work is same-day or next-day. Bigger jobs — fuel system rebuilds, turbo replacement, head gasket work — can take several days. We'll give you a realistic timeline upfront.
Yes. We pick up fleet vehicles when needed and prioritize work-truck downtime to get you back on the road quickly. Fleet pickup, scheduled maintenance plans, and priority service are all available — call us with your fleet size and needs.
Call our Winston-Salem shop, drop the truck off on Silas Creek Parkway, or use our after-hours drop-off. Most diesel diagnostics are same or next day — and you'll always know exactly what your truck needs before any work begins.
