Hey. As an installer who has spent years under the hoods of Silverado and Sierra HD trucks, I’ve seen the L5P platform evolve. While the 2017-2023 Duramax is an absolute powerhouse out of the box, it is still hampered by factory "choke points"—namely the EGR, DPF, and CCV systems.
If you’re looking to bulletproof your truck for long-term reliability or seeking that crisp throttle response for towing, you need a systematic approach. Today, I’m breaking down the best path for the L5P using TruckTok components. We’ll cover everything from the downpipe to the bed cover.
For all 2017-2023 models, the TruckTok 6.6L Chevy L5P 3.5" Downpipe Exhaust is a game-changer. It features a high-quality stainless steel build with a 4-bolt flange and 2 studs pre-installed for easier alignment. This pipe offers 20% better flow than factory. By eliminating the DOC (Diesel Oxidation Catalyst) and reducing backpressure, you get a faster turbo spool and lower EGTs.
If you have questions about specific bed measurements or how to loop the CAN bus wires for the 2020+ models, drop a comment below!
If you’re looking to bulletproof your truck for long-term reliability or seeking that crisp throttle response for towing, you need a systematic approach. Today, I’m breaking down the best path for the L5P using TruckTok components. We’ll cover everything from the downpipe to the bed cover.
1. The Exhaust Foundation: Breathing Through the Downpipe
The L5P’s factory downpipe is notoriously restrictive. To get the exhaust gas out of the turbine efficiently, you need to start here.For all 2017-2023 models, the TruckTok 6.6L Chevy L5P 3.5" Downpipe Exhaust is a game-changer. It features a high-quality stainless steel build with a 4-bolt flange and 2 studs pre-installed for easier alignment. This pipe offers 20% better flow than factory. By eliminating the DOC (Diesel Oxidation Catalyst) and reducing backpressure, you get a faster turbo spool and lower EGTs.
2. The "Off-Road" Evolution: DPF & CAT Delete Pipes
If you are building a dedicated competition or off-road rig, removing the DPF (Diesel Particulate Filter) is the single most effective way to improve fuel economy and power.Choosing Your Pipe Diameter:
- The 4" Standard: The TruckTok 4" DPF & CAT Delete Race Pipe or the 4" Downpipe Back DPF Delete Pipe is perfect for most trucks. It fits seamlessly with the OEM-style 4-bolt flange.
- The 5" Monster: For those pushing high horsepower or wanting a deeper, muscular tone, the TruckTok 5" Downpipe Back DPF Delete Pipe is the way to go. These systems have no bungs, ensuring a completely unobstructed flow that results in noticeable savings at the pump.
3. The Brains: CAN Bus Plugs & All-in-One Kits
When you remove the DPF/DEF systems, the truck’s ECM will panic unless you manage the signals. You need a way to keep the CAN-BUS "alive" so your fuel tank and lift pump data stay accurate.- For 2017-2019 Models: Use the TruckTok 4pcs Can Bus Plugs Connector. These looped wires provide the necessary closed signal back to the ECM.
- For 2020-2023 Models: The 2020-2023 Chevy Duramax L5P Can Bus Plugs perform the same vital function for newer trucks.
The Installer’s Choice: The All-in-One Package
I always recommend the comprehensive kits to my clients. It saves time and ensures component compatibility.- 2017-2019 Owners: The L5P 4" DPF Delete & 3.5" Downpipe w/ EGR Delete Kit includes everything—exhaust, downpipe, plugs, and EGR hardware.
- 2020-2023 Owners: The 2020-2023 L5P All-in-One Kit is the corresponding setup for the later models.
4. Engine Health: EGR and CCV Solutions
The factory EGR system recirculates hot, soot-filled gas, while the CCV system dumps oily mist into your turbo. This is a recipe for internal gumming.EGR Delete
The TruckTok L5P EGR Valve Cooler Delete Kit is made from billet aluminum and high-temp silicone. By recirculating the coolant more efficiently and removing the soot-heavy EGR, you lower engine temps and improve throttle response significantly.CCV Reroute
The plastic components in the factory CCV system are prone to cracking over time. The TruckTok 2017-2024 L5P CCV Reroute/Delete Kit uses an aluminum alloy block with integrated differential drop devices to remove oil more efficiently. This keeps your intake track clean and provides a much safer oil fill location at the front of the motor.
5. Bed Security: Tonneau Covers for Every Bed Length
Once the engine is dialed in, you need to protect your cargo. TruckTok offers two main styles: the Soft Roll-Up (utility focus) and the Hard Tri-Fold (security focus).The "Vault" (Fiberglass Hard Tri-Fold)
These are scratch-resistant and UV-protected. They provide a smooth, flush look and enhanced anti-theft security.- 8FT Long Bed: 2010-2025 8FT Hard Tri-Fold
- 6.9FT Standard Bed: 2020-2025 6.9FT Hard Tri-Fold
- 5.8FT Short Bed: 2019-2025 5.8FT Hard Tri-Fold
The "Versatile" (PVC Soft Roll-Up)
Perfect if you frequently haul tall items. Easy to install with no drilling.- 8FT Bed: 2014-2025 8FT Soft Roll Up
- 6.8FT Bed: 2020-2024 6.8FT Soft Roll Up
6. Mastering the Load: Towing & Recovery Systems
An L5P is meant to pull, but pulling safely requires the right geometry and recovery gear.- The 6" Adjustable Drop Trailer Hitch: Most L5P trucks sit high, especially if leveled or lifted. This 12,000 lbs GTW hitch allows for a 6-inch drop or rise, ensuring your trailer is perfectly level. Level trailers tow better, brake better, and save your tires.
- Kinetic Recovery Rope (1" x 30ft): If you or a buddy get stuck, do not use a tow chain. This 35,000 lbs break-strength rope stretches to use kinetic energy for a smooth, safe recovery.
- Shackle Hitch Receiver: This 2-inch receiver mount gives you a massive 38,500 lbs breaking strength point for off-road recovery.
Final Technical Summary
To do an L5P right, you must balance the "Delete" hardware with proper CAN Bus signal management. Starting with a 3.5" downpipe, following up with an EGR and CCV delete, and capping it off with a tuner-compatible exhaust pipe will give you a truck that runs cooler, lasts longer, and pulls harder.All "Delete" performance parts are for off-road or track use only. Please consult local regulations; any legal issues arising therefrom are your sole responsibility.If you have questions about specific bed measurements or how to loop the CAN bus wires for the 2020+ models, drop a comment below!
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