2011-2016 6.6L Duramax LML EGR Valve and Cooler Delete Kit
This hardware kit is designed for owners who have confirmed a listed 2011-2016 Chevrolet or GMC 2500/3500 application with the 6.6L Duramax LML diesel engine. It removes the factory EGR actuator valve and EGR cooler, closes the related intake and exhaust passages, and reconnects the affected coolant path while retaining the stock intake and exhaust manifolds. The kit includes the listed plates, coolant hose, clamps, fasteners, and O-rings; ECU tuning or programming, DPF exhaust components, CCV reroute parts, and other supporting modifications are not included.
Fitment
| Years | Make / Application | Engine | Required Check |
|---|---|---|---|
| 2011-2016 | Listed Chevrolet 2500/3500 applications | 6.6L Duramax LML diesel | Confirm exact model, engine code, body configuration, and factory EGR layout |
| 2011-2016 | Listed GMC Sierra 2500/3500 applications | 6.6L Duramax LML diesel | Confirm exact model, engine code, body configuration, and factory EGR layout |
- Confirm the 6.6L Duramax LML engine code before ordering.
- Confirm the factory EGR valve, cooler, coolant-hose, and emissions-system layout.
- Listed fitments only; a shared engine family does not confirm identical vehicle-side clearance or plumbing.
- Existing intake, exhaust, turbo, tuning, or emissions-system modifications may affect installation.
- Pickup, van, cab/chassis, drivetrain, transmission, and market-specific compatibility must be confirmed when not explicitly listed for the selected vehicle.
- Do not order for LLY, LBZ, LMM, or L5P engines.
Specifications
| Brand | FLASHARK |
|---|---|
| Product Type | EGR valve and cooler delete hardware kit |
| Engine | 6.6L Duramax diesel |
| Supported Engine Code | LML — confirm the engine code before ordering |
| Material | Stainless steel and billet aluminum |
| Listed Weight | 1450 g |
| Color Variants and SKUs | Black: FLES27011-BK; Silver: FLES27011-SR; Red: FLES27011-RD; Blue: FLES27011-BL |
Prices and availability vary by selected color. Use the product selector above for the current price and stock status.
Key Features
- Application-specific EGR hardware: Intended for listed 2011-2016 6.6L Duramax LML applications after the engine code and factory EGR layout have been confirmed.
- EGR valve and cooler removal: Provides the mechanical components used to remove the factory EGR actuator valve and EGR cooler.
- Intake and exhaust block-off points: The included plates close the related intake and exhaust passages after the EGR hardware is removed.
- Coolant-path connection: The supplied three-terminal hose and clamps are used to reconnect the coolant path affected by EGR cooler removal.
- Stock manifold retention: The current product configuration is designed to retain the stock intake and exhaust manifolds.
- Installation hardware included: Plates, coolant hose, clamps, fasteners, and O-rings are included as listed below.
- Professional installation recommended: Installation involves emissions-related hardware and the engine coolant circuit.
How This EGR Delete Kit Changes the Factory System
The factory EGR system routes a controlled amount of exhaust gas back into the intake through the EGR valve and cooler. This kit mechanically removes the EGR actuator valve and cooler, closes the related intake and exhaust openings, and reconnects the coolant path that previously served the cooler.
“Delete” is the commonly used product name, but the work includes several separate operations: removal of the valve and cooler, block-off of the gas passages, and reconnection or bypass of the associated coolant route. This kit does not remove the DPF, reroute the CCV system, replace the turbo, or include exhaust-pipe modifications.
What Is Included
- 1 × air-intake closing plate
- 1 × exhaust-side block-off plate
- 1 × three-terminal coolant hose
- 4 × clamps
- 9 × fasteners
- 2 × rubber O-ring seals
Not Included and Additional Items to Check
- ECU tuner, programming software, or electronic module
- DPF or catalytic-converter delete pipe
- CCV reroute kit or catch can
- Exhaust Up-pipe or replacement turbo components
- Replacement intake or exhaust manifold
- Coolant and general service supplies
- Any additional vehicle-specific gaskets, fittings, or reused factory hardware not shown in the package list
Inspect the vehicle and compare every supplied component with the package image before installation. Confirm whether additional coolant, seals, service hardware, or programming support is required for the exact vehicle configuration.
Tune, Programming, and Check Engine Light
This kit contains mechanical hardware only. It does not include an ECU tune, programmer, calibration file, or electronic module. Removing the factory EGR valve and cooler changes an emissions-related system monitored by the vehicle’s control module. A check engine light or EGR-related diagnostic trouble codes may occur when the expected valve, flow, or sensor behavior is no longer present.
Programming requirements and possible operating effects depend on the vehicle calibration, emissions configuration, existing modifications, and applicable law. Confirm the required procedure with a qualified diesel technician and a lawful tuning provider before installation. Do not remove warning-light bulbs or sensors to conceal a fault.
IMPORTANT: No claim is made that this kit prevents a check engine light, avoids diagnostic trouble codes, prevents limp mode, or maintains normal DPF regeneration behavior. These outcomes must be verified for the exact vehicle and calibration.
Installation Notes
- Professional installation is strongly recommended.
- Allow the engine to cool fully before beginning work on the EGR or coolant system.
- Installation may require draining or controlling coolant from the affected circuit.
- Keep sealing surfaces clean and inspect all hoses, clamps, O-rings, and fasteners before assembly.
- Route the supplied coolant hose away from hot, sharp, or moving components.
- After installation, refill and bleed the cooling system according to the applicable service procedure.
- Inspect for coolant and exhaust leaks before returning the vehicle to service.
- Existing modifications may change access, hose routing, clearances, or the required supporting parts.
Review the complete 2011-2016 6.6L Duramax EGR valve and cooler delete kit installation instructions before disassembly.
Installation Guide Images
Who This Kit Is For
- Buyers who have confirmed a listed 2011-2016 6.6L Duramax LML application.
- Buyers who understand that this kit changes the factory EGR and coolant-system layout.
- Buyers who have confirmed any required programming and supporting service items before installation.
- Buyers using the product only where the modification is permitted by applicable laws and regulations.
- Buyers prepared to use a qualified installer and inspect the completed cooling and exhaust connections.
Who Should Not Buy This Kit
- Anyone who needs to retain the complete factory emissions-control system.
- Anyone who has not confirmed the LML engine code and factory EGR layout.
- Anyone seeking a DPF delete pipe, CCV reroute kit, Up-pipe, tuner, or complete EGR/DPF/CCV package.
- Anyone expecting a guarantee of no CEL, no fault codes, no limp mode, or normal DPF regeneration without further verification.
- Anyone purchasing specifically to guarantee passage of an emissions inspection.
- Anyone who cannot accept possible effects on registration, warranty, insurance, resale, or road-use eligibility.
Emissions and Road-Use Notice
This product removes or renders inoperative components of the factory EGR emissions-control system. Laws governing the manufacture, sale, installation, registration, and use of emissions-related modifications vary by jurisdiction and vehicle application. Verify all applicable federal, state, and local requirements before purchase or installation.
This listing does not represent the product as street legal, emissions compliant, inspection ready, or certified for any specific jurisdiction. A non-road or competition label alone does not establish legal use.
Related Delete Kit Options
This product contains EGR valve and cooler removal hardware only. For separately sold configurations and supporting parts, review the FLASHARK Delete Kits collection. Check each product’s engine code, included components, programming requirements, and usage restrictions before combining parts.
Delivery, Return, and Protection
USA SHIPPING: Free shipping is available within the USA under the current shipping policy. Additional charges may apply to Alaska, Hawaii, Puerto Rico, Guam, Canada, and other remote destinations.
ORDER PROCESSING: Orders are generally processed within 1-2 business days. Typical delivery estimates vary by warehouse, carrier, destination, product availability, and shipping method.
RETURNS: Eligible unopened, unused products in their original packaging may be returned within 30 days of receipt. Contact FLASHARK before returning an item to obtain the authorized return address and instructions.
DELIVERY PROTECTION: Optional Worry-Free Delivery Protection may be available at checkout. Coverage and claim eligibility are governed by the current protection terms.
Review the current Shipping Policy, Refund Policy, and Worry-Free Delivery Protection before ordering.
2011-2016 6.6L Duramax LML EGR Delete Kit FAQs
Q1: What factory system does this kit change?
A1: It removes the factory EGR actuator valve and EGR cooler, closes the related intake and exhaust passages, and reconnects the coolant path affected by cooler removal.
Q2: Which engine code does this EGR delete kit fit?
A2: The listed engine code is the 6.6L Duramax LML. Confirm the engine code and factory EGR layout before ordering.
Q3: Which years and vehicles are listed?
A3: The current listing covers selected 2011-2016 Chevrolet and GMC 2500/3500 applications. Exact model, body, drivetrain, transmission, and emissions configuration must be confirmed.
Q4: Is this a complete LML delete kit?
A4: It is a mechanical EGR valve and cooler delete kit with the listed plates, coolant hose, clamps, fasteners, and O-rings. It is not a complete EGR/DPF/CCV package.
Q5: What parts are included?
A5: The package lists one intake closing plate, one exhaust-side block-off plate, one three-terminal coolant hose, four clamps, nine fasteners, and two O-rings.
Q6: Does the kit include tuning or programming?
A6: No. The package does not include a tuner, calibration file, programming software, or electronic module.
Q7: Is ECU tuning required?
A7: The exact programming requirement has not been verified for every vehicle calibration. Confirm it with a qualified diesel technician and a lawful tuning provider before installation.
Q8: Can this kit cause a check engine light or fault codes?
A8: Yes. Removing monitored EGR components may cause a check engine light or EGR-related diagnostic trouble codes. No no-CEL guarantee is provided.
Q9: Can the vehicle enter limp mode or have regeneration issues?
A9: Operating effects depend on the calibration, emissions configuration, existing faults, and other modifications. Limp-mode and DPF-regeneration behavior must be verified for the exact vehicle.
Q10: Does it work with the stock intake, exhaust manifold, and turbo?
A10: The current product description states that the stock intake and exhaust manifolds are retained. Confirm turbo, sensor, hose, and clearance compatibility for the exact vehicle and any existing modifications.
Q11: Are additional parts or service supplies required?
A11: Tuning is not included. Coolant, service supplies, reused factory hardware, or additional vehicle-specific seals and fittings may be needed after the exact installation procedure is confirmed.
Q12: Does installation require working with coolant?
A12: Yes. Removing the EGR cooler affects its coolant connections, so the installer must control, refill, and properly bleed the cooling system according to the applicable service procedure.
Q13: Is professional installation recommended?
A13: Yes. Installation involves emissions-related components, exhaust sealing points, coolant routing, and possible programming requirements.
Q14: Is the modification completely reversible?
A14: Complete reversibility is not guaranteed. It depends on retaining undamaged factory components and whether installation, tuning, wiring, sensors, or other vehicle systems were altered.
Q15: Can this kit affect emissions testing, registration, warranty, or insurance?
A15: Yes. Removing factory emissions-control components may affect inspection eligibility, registration, warranty coverage, insurance, resale, and legal road use. Verify the rules that apply to the vehicle and jurisdiction before purchasing.