2017–2023 Chevy/GMC L5P Duramax | EZ LYNK CCS Delete Tunes Only

Upgrade the performance and drivability of your 2017–2023 Chevy or GMC L5P Duramax with professional CCS EZ LYNK tuning, supplied and supported by Sasquatch Diesels.

These tune files are designed to provide responsive, clean, and usable power for daily driving, towing, hauling, and modified performance applications.

Tune-Only Product

This listing includes CCS EZ LYNK tune files only. An EZ LYNK AutoAgent is not included and is required to install the tuning.

Available add-ons may be selected from the product menus, including:

• Transmission tuning
  

Vehicle Compatibility

Fits:

• 2017–2023 Chevrolet Silverado 2500HD and 3500HD

• 2017–2023 GMC Sierra 2500HD and 3500HD

• 6.6L L5P Duramax diesel engine

Does Not Fit:

• L5D-equipped trucks

• Cab-and-chassis trucks should use our separate cab-and-chassis tuning listing

Cab-and-chassis models can use different ECM calibrations and vehicle configurations. Ordering the correct listing helps prevent compatibility and programming issues.

Important ECM Unlock Note (2017–2018)

ATTENTION: Some 2017–2018 trucks with ECM part number ending in 12676723 must be bench unlocked by EZ Lynk (ECM shipped in). These are not currently flashable through normal EZ Lynk flashing. 

If the ECM won’t unlock using the EZ LYNK AutoAgent 3, you’ve basically got two options that are not included in this purchase:

1. Send the ECM to EZ LYNK directly for the unlock/service (they have always done this as a free service, just pay for shipping), or
2. Buy HP Tuners MPVI4 and purchase HP Tuners credits to complete the unlock.

EZ Lynk releases firmware updates regularly, so compatibility improvements can change over time.

If you have a flashing/linking issue, EZ Lynk support is:
877-207-5530
https://ezlynk.com/support.html

Available Power Levels

CCS L5P tuning is commonly available in the following power levels:

• Modified Stock

• +45 HP

• +75 HP

• +90 HP

• +120 HP

Higher power levels may be available for trucks with the proper supporting modifications. Please provide the requested horsepower level and a complete list of engine, turbocharger, fuel-system, transmission, and airflow modifications when ordering.

Final power-level availability depends on the truck’s model year, installed modifications, transmission configuration, and intended use.

Optional Tuning Features

SOTF Tuning

Switch-on-the-fly tuning is coming soon for supported applications. 

TCM Transmission Tuning

Transmission tuning may be added when selected and supported for the vehicle.

TCM tuning can help improve:

• Shift timing

• Shift firmness

• Torque-converter behavior

• Power delivery between shifts

• Overall drivability under load

What CCS L5P Tuning Provides

CCS tuning is developed for L5P Duramax owners who want improved performance without sacrificing everyday drivability.

Depending on the selected file and vehicle configuration, benefits may include:

• Stronger low-end throttle response

• Increased horsepower and torque

• Improved towing and hauling manners

• Smoother, more controlled power delivery

• Refined engine response

• Improved drivability throughout the RPM range

• Calibration support for properly modified off-road vehicles

These tunes are well suited for daily-driven trucks, towing applications, work trucks, and performance builds requiring clean and predictable power.

Support Options

Single Tune With Four-Week Support

A practical option for customers who want one specific tune level.

Includes:

• Access to compatible tuning for four weeks

• Troubleshooting and revision support during the active support period

• The installed tune remains on the truck after the four-week period expires

• The option to upgrade to a Lifetime Support Pack later

Full Support Pack — Lifetime

Recommended for long-term ownership and customers who want access to additional files.

Includes:

• No expiration

• Unlimited supported flashes

• Access to the available tune library for your truck

• Updated tune files as revisions and improvements become available

• Long-term EZ LYNK support for the original vehicle and VIN

Tuning and support are VIN-specific and cannot be transferred to another vehicle.

Why Choose CCS Tuning?

• Developed specifically for the L5P Duramax platform

• Clean, usable power for real-world driving

• Multiple horsepower options

• Support for stock and properly modified trucks

• Refined throttle response and drivability

• Transmission tuning available for supported applications

• Technical support through Sasquatch Diesels

Important Flashing Instructions

Always connect a stable battery charger before programming the vehicle.

During the flash:

• Keep the battery charger connected

• Keep your phone or tablet close to the EZ LYNK AutoAgent

• Keep the EZ LYNK app open

• Do not open doors or operate accessories

• Do not press the brake pedal

• Do not unplug the AutoAgent

• Follow every key-cycle instruction exactly

• Never interrupt an active flash

Low or unstable battery voltage can cause communication errors, failed flashes, or ECM recovery issues.

Important Terms

Custom tuning is VIN-specific and is non-returnable and non-refundable once tune files or digital credits have been issued.

Sasquatch Diesels guarantees that the supplied tuning will function correctly for the supported vehicle configuration. Customers must cooperate with reasonable troubleshooting procedures, provide requested diagnostic information, and confirm that all mechanical and installation requirements have been completed.

This product is intended strictly for sanctioned off-road, competition, racing, agricultural, or other legally exempt applications. It is not intended for use on emissions-controlled vehicles operated on public roads. The purchaser is responsible for understanding and complying with all applicable municipal, state, provincial, and federal laws.