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Monday 4am - 6pm Tuesday 4am - 6pm Wednesday 4am - 6pm Thursday 4am - 6pm Friday 4am - 6pm Saturday 8am - 2pm

Denver Diesel & Automotive

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Denver, PA
Denver Diesel & Automotive

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Denver Diesel & Automotive provides truck, diesel and auto repair, fleet service and 24/7 roadside repair. We also service RVs and support commercial fleets.

We specialize in engine rebuilds and upgrades for Cummins, Duramax, Power Stroke, CAT and more. Family-owned since 1972, Denver Diesel & Automotive serves Lancaster County and surrounding communities with heavy-duty truck repair, light-duty diesel service, automotive repair and complete diesel engine rebuilds. Our two locations provide specialized care for owner-operators, commercial fleets and personal vehicle owners, from routine maintenance to major repairs and upgrades. Our Kramer Mill Road shop in Denver, PA focuses on heavy-duty diesel repair, semi-truck service and engine rebuilds, like the Cummins X15, Caterpillar C15 engines, and more. We provide diagnostics, engine overhauls, preventive maintenance, truck and trailer repairs, inspections, brakes, tires, electrical troubleshooting, cooling system repairs and transmission service. Located minutes from Route 222 and the PA Turnpike, our Kramer Mill team offers 24/7 roadside diagnostics and repairs when a breakdown interrupts your trip. Our Reading Road shop specializes in light-duty diesel repair and automotive service for fleet service trucks, work pickups, personal diesel pickups and gas-powered vehicles. With a strong focus on Cummins, Duramax and Ford Power Stroke engines, we handle diagnostics, major engine repairs and complete rebuilds. Services also include preventive maintenance, brakes, electrical troubleshooting, cooling system repairs, turbo upgrades, lift kit installations and suspension work. Whether you need an engine rebuilt, dependable fleet maintenance, roadside assistance or repairs for your personal vehicle, Denver Diesel & Automotive helps keep your vehicles ready for work and everyday driving.

10/19/2026

Another Cummins X15 build wrapped up and ready to get back to work! 💪🔧

10/08/2026

We’ve been tackling a wide variety of jobs at our second location, dedicated to light-duty vehicles!

From routine maintenance and diagnostics to major mechanical repairs, our team has been staying busy keeping our customers’ vehicles running strong!

Check us out at https://denverdiesel.net/

09/11/2026

Another Cummins X15 is in the shop getting the works! 🔧

This one is getting a complete engine overhaul along with some added power and upgraded turbo setup. Built to be reliable, run strong, and make some extra horsepower. 🔥

09/01/2026

Out doing some fleet maintenance inspections today!

Keeping our customers’ trucks inspected, maintained, and ready to work. Preventative maintenance helps catch problems early and keeps your fleet on the road where it belongs.

Give Denver Diesel & Automotive a call for your fleet maintenance and repair needs!

08/19/2026

Another king pin job in the shop today

We handle a lot of suspension work here, and we keep turnaround times fast so you can get back on the road sooner.

Give Denver Diesel & Automotive a call to get on the schedule!

08/19/2026

🚛 PETERBILT DUMP BUILD

We’re transforming this Peterbilt into a tandem-axle dump truck! Here are a few progress shots as our team gets this build closer to hitting the road. 💪

Stay tuned for the finished product!

📞 Denver Diesel & Automotive | Denver, PA

08/18/2026

Another 6.7 Powerstroke in the shop getting some extra power and performance! 💪

Want more power out of your 6.7 Powerstroke? Give us a call and let’s talk about the right setup for your truck and budget.

08/17/2026

Another Cummins X15 in and out the door at Denver Diesel & Automotive!

Whether you’re looking for a complete rebuild, better reliability, or more power, we’ve got you covered.

🔥 X15 Rebuilds
🔥 Performance Upgrades
🔥 Built for Power & Reliability

Keep your truck working and making money.

📞 Give Denver Diesel & Automotive a call today!

07/30/2026

Our team has been working full force on this complete Drott gantry crane refurbishment. The project included a full engine overhaul, complete hydraulic system repairs, extensive mechanical work, and fresh paint to bring this machine back to life!

06/23/2026

We’ve had a few different engines in the shop lately getting the full treatment — overhauls, head work, tear-downs, inspections, cleaning, and getting everything ready to go back together the right way.

Whether it’s a work truck, daily driver, farm equipment, performance build, or something that’s been sitting too long, we take pride in doing the job correctly from start to finish.

Address

1200 Kramer Mill Road
Denver, PA
17517

Opening Hours

Monday	4am - 6pm
Tuesday	4am - 6pm
Wednesday	4am - 6pm
Thursday	4am - 6pm
Friday	4am - 6pm
Saturday	8am - 2pm

Telephone

+17174455390

Website

https://denverdiesel.net/, https://www.linkedin.com/company/denver-diesel-automotive/, https://www.tiktok.com/@denverdie

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