Services Available at
DPF / DOC Cleaning (Pulse / Bake)
DES uses a rigorous 8-step cleaning process to ensure your diesel particulate filter is thoroughly cleaned to its maximum level, every time. We track every cleaning for you, keeping logs of important data, before & after pictures and weights to give you a comprehensive report.
DPF Parts & Accessories
DES offers a full line of heavy-duty, medium-duty & light duty DPFs, DOCs & DPF accessories as a Redline Emissions Products® Dealer – and – we also carry brands like Durafit, Skyline, Filtertherm®, FSX, CDTi, ESW, Hug, Huss, and Johnson Matthey.
Full Diesel Repair
DES offers full diesel repair services for heavy-duty diesel engines. In addition to handling your emissions repair and DPF cleaning needs, our expert diesel mechanics can fix just about any area of your truck.
DPF Light Resetting & Fault Code Troubleshooting
DPF light coming on? Pulling fault codes? DES can troubleshoot and inspect your emissions system, perform any required maintenance, and reset your DPF light.
Discounts & Free Pickups
DES offers discounts for cleaning multiple DPFs / DOCs (ask us), and we offer free pickup & delivery of DPFs within a 30 mi (48 km) radius. We have fully-stocked service trucks for DPF mobile installation, typically covering the West Coast.
If your truck is Pre-2007, DES can custom fit (retrofit) a compliant emissions system to your vehicle. DES is a CARB verified and EPA certified installer that has installed more emissions control devices than any of our competitors.
EGR Cleaning (NEW service)
DES now offers EGR Cleaning Service – which increases fuel mileage, lowers engine opacity, removes carbon build-up, extends the life of the EGR system, decreases intake temperature, and increases airflow to the engine (requires an oil change after service) – ask about our bundle discount.
Diesel Oil Change
DES offers standard oil change services for heavy, medium, and light-duty diesel engines.
DPF R&R & Custom Mounting
DES offers standard remove & replace services for DPFs, and we offer custom DPF mounting. DES manufactures and installs custom sized brackets, mounts, guards, step covers and offers complete customized mounting kits. Our engineering department can design the highest quality system that’s perfect for your application.
DES offers full emissions systems diagnostics, helping you troubleshoot DPF & emissions issues. Often issues with a DPF can be caused by unresolved engine issues upstream such as air or oil/fluid leaks. We check for engine issues and the whole health of the system to see how it’s affecting the DPF.
Engine in Frames
About DES in Redding
Established in 1978 as a full-service, family-owned truck repair facility and salvage yard, North State Truck Equipment Inc., has been evolving to offer experienced service, parts and overall knowledge for heavy-duty diesel trucks.
In 2007, North State Truck Equipment Inc. expanded our service to become a DPF retrofit distributor and opened Diesel Emissions Service (DES) as the emissions department of our company. Over the last eight years, DES has grown from our Redding headquarters to include locations in Sacramento, Ontario, San Leandro, Vancouver, and Portland, and offer a wide array of services to meet the needs of our customers.