WELCOME TO
PAULHAMUS DIESEL PERFORMANCE
Expert Diesel Mechanics for Repair, Diagnostics & Performance Upgrades
PDP has been serving diesel truck owners across the Williamsport area since 2018. We provide professional diesel truck repair, diagnostics, and performance services for pickup trucks and light-duty diesel vehicles. If you’re looking for a Williamsport diesel repair shop that can handle everything from advanced diagnostics and repairs to transmission work, suspension upgrades, and emissions-compliant performance & aftermarket installations, the diesel mechanics and automotive technicians at PDP deliver results without shortcuts.
Located just outside Williamsport in Jersey Shore, we serve diesel and truck owners throughout Lycoming County and surrounding communities who want reliable diesel & automotive repairs, expert service, and performance upgrades done the right way.
Click below to learn more about our Williamsport diesel performance and repair services
FEATURED VIDEOS
Grid Heater Failure Repair
Grid Heater Failure Repair
6.7L Powerstroke Diagnostics
Alignments
DIESEL PERFORMANCE
THE WAY IT'S SUPPOSED TO BE
YOUR TRUCK'S RELIABILITY AND REAL-WORLD USE ARE #1
Diesel mechanics should improve how your truck works, not create new problems. At PDP, diesel performance isn’t about chasing numbers. It’s about building trucks that run stronger, last longer, and handle real-world use across the Williamsport area. Whether it feels down on power, isn’t pulling like it should, or you’re ready to upgrade parts the right way, we approach performance with the same mindset we use for repair. Diagnose it correctly, build it properly, and make sure the supporting systems can handle it. From fuel and turbo work to transmission and chassis upgrades, everything we do is focused on stronger drivability and long-term reliability.
We specialize in GM Duramax 6.6L Turbo Diesels as well as Cummins 5.9L and 6.7L Turbo Diesels, Ford Powerstroke 7.3L, 6.0L, 6.4L and 6.7L, among others. No matter the issue, our team focuses on accuracy, reliability, and long-term results. Take a look at the services we offer to see how we handle diesel repair and performance for pickup owners across the region.
For reliable Diesel Repair and Performance Services for Duramax, Cummins, and Power Stroke Diesels, give us a call today!
OUR DIESEL REPAIR & PERFORMANCE SERVICES
Paulhamus Diesel Performance provides complete service for pickup trucks, work trucks, and light-duty fleets. From routine maintenance to advanced diagnostics and performance upgrades, every job is handled by experienced diesel mechanics.
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Full engine rebuilds & repairs
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Cooling system service
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EGR, DPF, and emissions system repair
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Injector replacement & fuel system repair
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State Inspection/Emissions and preventative maintenance
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Check engine light and drivability diagnostics
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Advanced scan tool analysis and data logging
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Electrical system diagnostics and repair
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Aftermarket Troubleshooting
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Power loss, regen, and sensor fault diagnosis
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Certified BanksPower Installer
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Emissions-compliant performance
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Turbo upgrades & bolt-on modifications
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Cold air intakes & airflow improvements
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Intercooler upgrades & charge air system enhancement
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Transmission repair & replacement
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Transfer case repair & service
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Differential repair & gear service
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Heavy Duty Transmission Builds
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Torque converter replacement and upgrades
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Steering component repair
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Front-end suspension rebuilds
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Shock and strut replacement
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Wheel & tire installation, balancing, and alignment
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Lift kit installation & leveling
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Routine fleet maintenance
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Multi-vehicle diagnostics and repair coordination
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Emissions system repair and compliance service
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Brake and chassis service for work trucks
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Preventative service programs to reduce downtime
YOUR TEAM OF DIESEL
PERFORMANCE EXPERTS
DECADES OF EXPERIENCE AT YOUR SERVICE
Our auto repair shop is built around experienced, ASE-Certified, diesel mechanics and technicians who understand modern diesel systems, diagnostics, and performance upgrades. We apply decades of practical experience with advanced diagnostic equipment and a commitment to doing the job correctly the first time.
WE STAND BY OUR WORK
12 MONTH / 12,000 MILE WORKMANSHIP WARRANTY
on all labor performed in our shop
WHAT OUR CUSTOMERS SAY
NEED A TOW?
If you can’t get your truck to the shop, we can help with that too. Paulhamus Diesel Performance has a rollback available to safely transport your vehicle when it’s not drivable or you simply don’t have the time to coordinate a tow yourself. Whether you’re dealing with a breakdown, a no-start issue, or a truck that isn’t safe to drive, we can arrange pickup and bring it directly to our facility for diagnostics and repair.
This is especially helpful for work trucks and fleet vehicles where downtime matters and schedules are tight. Just call the shop, explain what’s going on, and we’ll walk you through the best way to get your vehicle here. Our goal is to make the repair process as easy and stress-free as possible from start to finish.
FOLLOW US ON INSTAGRAM
@paulhamusdiesel
Serving the Williamsport Area
and Surrounding Communities Since 2013
As a diesel repair shop serving the Williamsport area, we work with customers throughout Lycoming County, Clinton County, and nearby towns. Our location just outside Williamsport allows us to support diesel owners from Williamsport, South Williamsport, Montoursville, Muncy, Hughesville, Lock Haven, Mill Hall, Lewisburg, and surrounding Pennsylvania communities who are looking for professional diesel repair, diagnostics, and performance services worth the drive.
We work on Cummins, Duramax, and Powerstroke platforms every day, along with light-duty diesel trucks and work pickups for commercial and small business fleets across the region. While diesel repair and performance is our specialty, we also provide full automotive service for gas vehicles and select EV models, delivering a better-than-dealership level of diagnostics, workmanship, and accountability to every vehicle that comes through our shop. So if you've been searching for a "diesel repair shop near me" look no further than the team at PDP.
Dan Paulhamus
- Owner