2020 L5P Delete Kit Installation Tips & Common Mistakes to Avoid

If you own a 2017-2023 Sierra or Silverado with the 6.6L Duramax L5P engine, installing an EGR delete kit or DPF delete kit can significantly improve performance, fuel efficiency, and engine longevity. However, the installation process requires precision to avoid costly mistakes.

In this guide, we’ll cover essential L5P delete kit installation tips and highlight common errors to ensure a smooth upgrade for your Duramax performance parts.

Why Install an EGR/DPF Delete Kit?

Before diving into installation, it’s important to understand the benefits:

Improved horsepower & torque – Removing restrictive emissions systems enhances airflow.
Better fuel economy – Reduced backpressure means more efficient combustion.
Longer engine life – Eliminating soot buildup and EGR-related carbon deposits reduces wear.
Reduced maintenance costs – No more clogged DPFs or failing EGR coolers.

For a high-quality Duramax delete kit, check out our EGR/DPF Delete Kit for 2017-2023 Sierra/Silverado L5P.

L5P Delete Kit Installation Tips

1. Gather the Right Tools

Before starting, ensure you have:

Socket set & wrenches

Torque wrench

Pry bars (for stubborn clamps)

Safety gloves & goggles

Shop towels & degreaser

2. Follow a Step-by-Step Guide

Every Duramax delete kit is slightly different, so always refer to the manufacturer’s instructions. Key steps usually include:

Disconnecting the battery

Removing the DPF & SCR systems

Installing the EGR block-off plates

Replacing the exhaust with a straight pipe or high-flow system

3. Ensure Proper Tuning

A DPF/EGR delete requires a compatible performance tuning solution to prevent check engine lights and optimize power. Never run a deleted truck without a proper tune!

4. Double-Check All Connections

Leaks in the exhaust or EGR system can cause performance issues. Tighten all clamps and bolts to the recommended torque specs.

Common Mistakes to Avoid

• Skipping the Tune

Running a deleted L5P Duramax without tuning can lead to engine damage, limp mode, or failed sensors. Always use a reliable tuning solution after installation.

• Improper EGR Block-Off Plate Installation

If the EGR delete kit isn’t sealed correctly, exhaust gases can leak, reducing efficiency. Use high-temperature gasket sealant if needed.

• Forgetting to Clear DTCs (Diagnostic Trouble Codes)

After installation, clear any stored codes with a compatible scanner to ensure smooth operation.

• Using Low-Quality Delete Kits

Cheap DPF/EGR delete kits may not fit correctly or could fail prematurely. Invest in a high-quality kit like our Dynovox EGR/DPF Delete Kit for durability and performance.

• Ignoring Local Emissions Laws

Before deleting, check your state’s emissions regulations. Some areas enforce strict penalties for tampering with emissions systems.

Final Thoughts

Installing an L5P delete kit can unlock your Duramax’s true potential, but proper installation is key. By following these tips and avoiding common mistakes, you’ll enjoy better performance, fuel economy, and engine reliability.

For a top-tier EGR/DPF delete solution, explore our complete L5P delete kit designed for 2017-2023 Sierra & Silverado trucks.

Have questions? Drop a comment below or contact our diesel performance experts for guidance!