2017-2021 Duramax 6.6L L5P ECM 12711509

🚚 We Ship Worldwide
👍 Lifetime Warranty With Core Return
✅ 100% Tested & Programmed OEM Replacement

2017-2021 Chevrolet Silverado 2500HD/3500HD, GMC Sierra 2500HD/3500HD, Chevrolet Express 2500/3500 & GMC Savana 2500/3500 6.6L Duramax L5P Engine Control Module (ECM)

This professionally remanufactured 2017-2021 Chevrolet Silverado 2500HD/3500HD, GMC Sierra 2500HD/3500HD, Chevrolet Express 2500/3500, and GMC Savana 2500/3500 6.6L Duramax L5P Engine Control Module (ECM) is engineered to restore factory engine performance, fuel management, and overall vehicle reliability.

Every ECM is rebuilt to OEM specifications, programmed to your vehicle's VIN, and thoroughly tested by experienced technicians before shipment. Each unit undergoes complete quality-control and diagnostic testing to ensure dependable operation right out of the box.

Compatible OEM Part Numbers: 12711509, 12700911

📦 WHAT'S INCLUDED

✓ 1x Remanufactured 6.6L Duramax L5P Engine Control Module (ECM)

✓ VIN Programming for Your Exact Vehicle

✓ Latest OEM Software Updates Installed (When Available)

🚘 COMPATIBILITY

Years: 2017-2021

Make: Chevrolet / GMC

Models:

• Silverado 2500HD

• Silverado 3500HD

• Express 2500

• Express 3500

• Sierra 2500HD

• Sierra 3500HD

• Savana 2500

• Savana 3500

Engine: 6.6L Duramax Diesel (L5P)

Part Numbers: 12711509, 12700911

Part Type: Engine Control Module (ECM)

⭐ WHY CHOOSE US?

✓ VIN Programmed for Your Vehicle — Plug & Play Installation*

✓ Premium OEM Remanufactured Module

✓ Professionally Tested Before Shipping

✓ Lifetime Warranty With Core Return

✓ Fast Worldwide Shipping

✓ Latest OEM Software Updates Installed When Available

✓ Trusted Diesel Electronics Specialists

🔔 IMPORTANT – VIN REQUIRED

To properly program your Engine Control Module before shipment, we require your 17-digit Vehicle Identification Number (VIN).

Please include your VIN during checkout or send it to us through eBay messages after purchase.

⚠️ COMMON SYMPTOMS OF A FAILED ECM

● No-start or hard starting

● Check Engine Light illuminated

● Reduced engine power or limp mode

● Poor throttle response

● Injector or fuel system communication faults

● Engine misfires or rough running

● Poor fuel economy

● Intermittent stalling

● Communication faults with other vehicle control modules

🚚 SHIPPING

We ship worldwide. Every ECM is securely packaged and shipped after VIN confirmation and programming has been completed.

🔄 RETURNS

Returns are accepted within the stated return period if the item is returned in its original condition. A restocking fee may apply.

💰 CORE POLICY

$100 Refundable Core Fee

Your purchase includes a $100 refundable core charge.

Return your original rebuildable ECM, and your $100 core refund will be issued.

No Lifetime Warranty Unless Original Rebuildable Core Is Returned.

👍 WARRANTY

This Engine Control Module includes a Lifetime Warranty when your original rebuildable core is returned.

*Plug & Play installation applies when the correct VIN is provided before shipment and programming is completed by ACS.