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

2004-2005 Chevrolet Silverado 2500/3500 & GMC Sierra 2500/3500 6.6L Duramax LLY ECM Replacement Module

This 2004-2005 Chevrolet Silverado 2500/3500 and GMC Sierra 2500/3500 6.6L Duramax LLY ECM is a high-quality, direct-fit remanufactured replacement module engineered to restore dependable engine performance and vehicle operation. It is professionally programmed to your vehicle's VIN for a straightforward Plug & Play installation.

Each unit is individually inspected, professionally remanufactured, programmed, and quality-control tested by experienced technicians before shipment. No unit leaves our facility without passing a complete diagnostic process.

Compatible OEM part number: 15141667.

📦 WHAT'S INCLUDED

✓ 1x 2004-2005 Duramax 6.6L LLY Engine Control Module (ECM)
✓ VIN programming for your exact vehicle
✓ Latest OEM software updates installed when applicable

🚘 COMPATIBILITY

Years: 2004-2005
Make: Chevrolet / GMC
Models: Silverado 2500HD, Silverado 3500, Sierra 2500HD, Sierra 3500
Engine: 6.6L Duramax Diesel (LLY)
Selected Part Number: 15141667
Part Type: Engine Control Module (ECM)

⭐ WHY CHOOSE US?

✓ VIN programmed for your exact vehicle — Plug & Play installation*
✓ Premium remanufactured OEM-quality unit, thoroughly tested by experienced technicians
✓ Lifetime Warranty
✓ Fast worldwide shipping after VIN confirmation
✓ Latest OEM software updates included when applicable
✓ 150+ verified 5-star reviews

🔔 Important – VIN Required

To ensure proper programming of your ECM before shipment, we require your Vehicle Identification Number (VIN). Please provide it during checkout in the designated field. If unavailable at checkout, you may send it later via email at sales@autocomputerusa.com, call (305) 456-9505, or text/WhatsApp us at 786-269-4099.

⚠️ COMMON SYMPTOMS

● No-start or hard starting conditions
● Check Engine Light or stored ECM fault codes
● Reduced engine power or poor acceleration
● Poor fuel economy
● Injector control issues
● Communication errors with vehicle modules
● Engine performance problems or stalling
● Intermittent drivability concerns

🚚 SHIPPING

We offer fast worldwide shipping. Your ECM is securely packaged and shipped after VIN confirmation and programming.

🔄 RETURNS

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

👍 WARRANTY

This unit comes with a Lifetime Warranty for long-term peace of mind.

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