We install the latest GM software updates, ensuring optimal performance and compatibility right out of the box. For many owners of a truck needing a2004 GMC Yukon XL 2500 PCM, this is the most efficient path back to reliability.
Your original part number is printed on a sticker on the case of your current PCM. While this2003-2006 Escalade PCM 12602802 is compatible with many service numbers, the most important factor for programming is your vehicle’s VIN.
As a technician, one of the biggest hurdles in replacing a PCM used to be the final step: programming. You could install the physical part, but the vehicle was still a paperweight until it was towed to a dealer for expensive flashing.
GM installed this 12589463 PCM in all of the above applications. This was possible because each of these models received their specific programming from the factory. In other words, you can’t simply swap a used PCM from one vehicle to the next.
This isn’t just a part in a box; it’s a complete solution. This critical step ensures that the computer is perfectly matched to your truck’s engine, transmission, and factory options, loading it with the latest software updates from GM.
On these GMT800-platform trucks and SUVs, the VIN-specific programming is not just a suggestion—it’s essential. The best way is to match the service number on your current PCM to one of the compatible numbers listed (12589463 ,89017750 ,12582605 ,12602802, etc.).
This is a working PCM that was taken out of a 2006 Hummer H2 SUT with a GM 6.0L motor. It may fit other GM 6.0 trucks. I am not sure.
• Engine type (LM7, L59, LR4, or LQ4). • L33 – 5.3L NON-FLEX FUEL, HIGH OUTPUT, ALUMINUM BLOCK, 243 HEADS, 24X. It may or may not be similar to what you receive. • Transmission type. • Throttle type (Drive By Wire ONLY).
The product is a Chevrolet Truck engine computer module for a 2005-2006 Silverado. It is a genuine OEM part with the manufacturer part number 12589463. This ECM is interchangeably labeled as part 590 with superseded part numbers 2724, 12602802, 2723, 12582605, 89017750, 28042802, 89017734, and 12589463.
My original part number isn’t 12589463. Will this still work?. We flash the unit with the latest GM-certified software specifically for your vehicle using the VIN you provide. Getting your truck or SUV back in top form is our priority.