03-06 TAHOE SIERRA ECU ECM PCM ENGINE MODULE COMPUTER 12586242 12583660 HAS COM

12583660 - You must match these exactly!

Hardware No: 12583660

Service No: 12586242

ECU tested and does have communication and a properly functioning processor! All 8 injectors tested good, IA heater relay tested, FICM relay control, EGR function, Fuel pressure regulator and more!!

• You must match your part number exactly as seen above. If any numbers are off compared to your original it will not work properly.
• Ecu will require programming or coding to your vehicle or vehicle's security system and is not plug and play. We provide "Free" VIN programming. Just supply your VIN at the time of purchase and we'll take it from there.
• Ecu will fit 2003-2006 GM Chevy GMC large truck and SUV (Sierra, Silverado, Tahoe, Suburban etc) gas models with an exact part number match.

Pins perfect, none are broken or bent

This ECM comes with a 90 day warranty from the date of purchase. Please keep a copy of your purchase record which we will send with your item.