1 Product
CAN BUS Plug Kit
What Is a CAN Bus Plug Kit?
A CAN Bus plug kit supplies terminating plugs that take the place of emissions components removed from your truck’s CAN (Controller Area Network) bus. When NOx sensors or the DEF module are unplugged during an exhaust conversion, the ECM sees an open circuit and reacts with fault codes and dashboard warnings. These plugs fill those connections and return a closed signal, so the control module reads the circuit as complete.
What It Solves
After installing an aftermarket exhaust or delete pipe, L5P owners run into the same frustrating symptoms. An open CAN connection is often the culprit:
- Persistent check-engine light and stored emissions fault codes that will not clear.
- Dashboard warnings such as emissions-system or DEF system faults.
- Reduced power and limp mode as the ECM protects itself from what it reads as a fault.
- Failed or incomplete tuning flashes when the network is not reading a complete circuit.
This kit is the small, inexpensive part that keeps your truck’s electronics stable while the mechanical work is finished — and it is the piece most people forget to order first.
Fitment
Designed for 2017–2023 Chevrolet Silverado and GMC Sierra 2500/3500 HD with the 6.6L L5P Duramax.
Match the plug color to your harness. On 2017–2019 models, check the connector located inside the frame on the front passenger side — if that plug is white, order the white CAN Bus plug. Taking thirty seconds to confirm the color before ordering saves you a return and a second round of shipping.
Typical Installation Sequence
- Complete the mechanical exhaust work first (aftermarket exhaust or delete pipe).
- Locate the NOx sensor and DEF module connectors being taken out of service.
- Disconnect the factory component and seat the CAN Bus plug firmly until it clicks.
- Secure the plug and any loose harness away from exhaust heat and moving parts.
- Load your tuning, then clear codes and verify no emissions faults return.
Buying Notes
- Confirm plug color first on 2017–2019 trucks before ordering.
- Professional installation is recommended. These kits assume solid mechanical knowledge, and minor adjustments may be necessary during installation.
- Warranty impact: this type of modification will affect your vehicle warranty — confirm with your manufacturer before purchase.
Important Compliance Note
Off-road and competition use only. These products are intended for off-road use only and may not be legal for use on public highways where pollution control laws apply. Removing or defeating emissions-control equipment on a vehicle operated on public roads may violate the Clean Air Act and state or local regulations. Check your local and state laws before purchasing or installing.
Filter products
- ENGINE
-
POWERSTROKE
- DPF Delete Exhaust
- All In One Kit
- EGR Delete Kit
- CCV PCV Reroute Kit
- DPF Delete Dual Exhaust
- Tuner
- Intercooler Pipe Kit
- Up-Pipe
- Intercooler
- CP4 Bypass Kit
- CCV Recirculating Kit
- Muffler
- Downpipe
- Intake Manifold
- Air Intake Kit
- Radiator
- Oil Catch Can
- Differential Cover
- Coolant Tube
- Valve Cover
- Transmission Pan
- Coolant Expansion Tank
- Exhaust Manifold
- Turbo
- Suspension & Lift
-
DURAMAX
- Tuner
- EGR Delete Kit
- CCV Reroute/delete kit
- DPF Delete Exhaust
- DPF Delete Dual Exhaust
- All In One Kit
- Muffler
- Up-Pipe
- Downpipe
- Intake Elbow Bridge Kit
- Intercooler
- Intercooler Pipe Kit
- Air Intake Kit
- Radiator
- Differential Cover
- Valve Cover
- Oil Pan
- Cooler Line Kit
- Fuel Sump Return Kit
- Tonneau Cover
- Coolant Tube
- Suspension & Lift
-
DODGE RAM
- Tuner
- EGR Delete Kit
- CCV Reroute/delete kit
- EGT Relocation Kit
- DPF Delete Exhaust
- All In One Kit
- Muffler
- Air Intake Kit
- Intercooler
- Intercooler Pipe Kit
- Radiator
- Valve Cover
- Differential Cover
- Intake Manifold
- Coolant Bypass Kit
- Coolant Leak Repair Kit
- Fuel Rail Plug
- Fuel Tank Sump Kit
- Oil Catch Can
- Oil Pan
- Coolant Tube
- Suspension & Lift
- ALL-IN-ONE KITS
- CATEGORIES
- 🔥BFCM
Let customers speak for us
from 6360 reviews
Only positives to leave here! Amazing product, amazing ship time, amazing price!! I got a 10 percent discount!! I got fast shipping! It says between 3-7 working business days, I ordered Friday and got it Tuesday afternoon! The welds are solid and the metal is strong! Will be ordering from you guys again! Shipping box was beat up a bit but the products themselves were mint!
Coolant reroute fit perfectly, install was a breeze. Everything I’ve bought exhaust, egr delete, and coolant reroute have fit perfect, 0 complaints. Ccv reroute will be next and coolant upper pipe!
Installed this on my 2012 F-150 5.0L using a LubeLocker gasket instead of RTV. Installation went smoothly, and so far everything is working great with no leaks.
One helpful note for other buyers: I couldn't find the recommended cover bolt torque specification in the documentation, so I contacted SPELAB support. Their technical team confirmed a specification of 25–30 N·m (approximately 18–22 ft-lbs). I torqued mine to 20 ft-lbs.
It would be helpful if SPELAB included this information in the installation instructions. Otherwise, very happy with the purchase so far!
The fuel line they sent with the intake horn did not fit properly and also there was a issue with the flare nut not reaching the threads
I have been having issues with the tune (hopefully not the tuner). I emailed customer service with my concerns and got a response within an hour. I didn’t even think to check my email that quick because “normal” customer service takes days. They responded both times in such a rapid manner I was not able to respond with the issues that fast. They have been great to deal with. I will continue to purchase from them because of that alone
I recently purchased the SPELAB grid heater delete plate kit and installed on my 2018 Ram 2500 with the 6.7 Cummins diesel engine
I Was not left disappointed with the ease of ordering and speed of service along with the completeness of the kit and High quality fit and finish !
I now have the piece of mind as well as the High performance that the grid heater deleate plate offers for my Ram 2500
Very Pleased with with customer service and the quality of the product
Thanks SPELAB
PHIL with
Peterson Farms Of Nashville DIY YT Channel
This kit is put together so well love the packaging it came in and how simple it is to assemble i did notice a slight drop in EGTs like it said it would and also no leaks what so ever. Only issue is not stickers
Got rid of my factory horn and went with this one for 93% more air flow and it looks sick
Great quality and fit Perfect
Great Product. Quality seems really good too.
Easy to install, beautifully crafted
That's beautiful !
beautifully crafted
It's beautiful, easy to install.
Great Product easy installation work flawlessly on my 2018 Ram 2500
CAN BUS Plug Faqs
It fills the electrical connections left open when NOx sensors or the DEF module are removed during an exhaust conversion. The plug sends a closed signal back to the ECM so the control module reads the circuit as complete instead of logging an emissions fault.
It is designed to keep the CAN network reading a complete circuit after emissions components are removed, which helps prevent the fault codes, dashboard warnings, and reduced-power conditions that follow an open circuit. Clear codes after installation and verify none return.
It is built for 2017-2023 Chevrolet Silverado and GMC Sierra 2500/3500 HD trucks equipped with the 6.6L L5P Duramax diesel.
On 2017-2019 models, check the connector located inside the frame on the front passenger side. If that plug is white, order the white CAN Bus plug. Confirming the color before ordering avoids receiving the wrong part.
No. These kits are intended for off-road and competition use only and may not be legal on public highways where pollution control laws apply. Removing or defeating emissions equipment on a road-driven vehicle may violate the Clean Air Act and local regulations. Check your local and state laws before buying or installing.
