Restore Peak Performance to Your GM Truck or SUV
Is your GMC Yukon, Chevy Silverado, or Cadillac Escalade suffering from frustrating issues like a persistent check engine light, poor fuel economy, erratic shifting, or a no-start condition? These are classic signs of a failing Powertrain Control Module (PCM), the central computer responsible for managing your vehicle’s engine and transmission. Don’t let a faulty module keep you off the road. This direct-fit PCM, part number 12589463, is the reliable solution to restore your vehicle’s original performance and efficiency.
The PCM is the brain of your vehicle’s operation. It constantly analyzes data from sensors throughout the engine and drivetrain to precisely control fuel injection, ignition timing, transmission shift points, and emissions systems. When it begins to fail, it can cause a cascade of problems that are often misdiagnosed, leading to costly and unnecessary repairs of other components. Replacing the PCM with a properly functioning unit is critical to ensuring your vehicle runs smoothly, efficiently, and reliably for years to come.
The Plug-and-Play Solution: Programmed Specifically for Your Vehicle
What sets this module apart is our professional programming service. When you purchase this PCM, we don’t just send you a generic part. We use the 17-digit Vehicle Identification Number (VIN) you provide to flash the module with the latest, most up-to-date software directly from General Motors. This ensures perfect compatibility with your vehicle’s specific configuration, options, and emissions standards. It arrives at your door ready to install, eliminating the need for an expensive trip to the dealership for programming. After a simple security relearn procedure that you can do in your driveway, your vehicle will be back to its factory-specified operation.
From the Diagnostic Bay
We once had a 2005 Silverado 2500 in the shop with a stubborn P0171 (System Too Lean) code. The owner had already replaced the MAF sensor, both upstream O2 sensors, and the fuel filter, but the check engine light kept coming back. After hooking up our diagnostic scanner and monitoring live data, we noticed the short-term fuel trims were erratic and unresponsive at times. Instead of throwing more parts at it, we inspected the PCM. We found that the driver circuit for the fuel injectors was failing intermittently, causing the lean condition. A new, correctly programmed PCM like this one solved the problem instantly. It’s a reminder that sometimes the root cause lies with the computer itself, not just the sensors it’s reading.
Common Symptoms of a Failing Yukon XL 1500 PCM
- ✔ Persistent Check Engine Light (CEL) with various trouble codes.
- ✔ Engine stalling, stumbling, or misfiring.
- ✔ Noticeable decrease in fuel economy.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Vehicle fails to start, even with a good battery and starter.
- ✔ Communication errors when using a diagnostic scan tool.
- ✔ Failure to pass state emissions testing.
This module is a direct replacement for a wide range of GM trucks and SUVs, and is compatible with multiple service numbers including 89017750, 12582605, 12589463, 12602802, 89017734, and 28042802. Please verify your original part number to ensure proper fitment. By providing your VIN upon purchase, you guarantee that the software loaded onto this module is a perfect match for your vehicle’s powertrain and systems.
Frequently Asked Questions
Do I need to get this PCM programmed by a dealer?
No. This PCM comes fully programmed to your vehicle’s specific VIN before it is shipped. This saves you the time, hassle, and expense of a dealership visit.
What is the ‘security relearn procedure’?
After installation, you will need to perform a simple security relearn to sync the new PCM with your vehicle’s anti-theft system (VATS/Passlock). This typically involves turning the key to the ‘ON’ position for 10-15 minutes, then off, and repeating the cycle two more times. Instructions are readily available online for your specific model.
Where is the PCM located on my 2004 Yukon XL?
On most compatible GM trucks and SUVs from this era, the PCM is located in the engine bay on the driver’s side, under or next to the battery tray.
What information do you need from me after I order?
We will need your complete 17-digit Vehicle Identification Number (VIN) to program the module correctly. You can typically find your VIN on your vehicle’s registration, insurance card, or on the driver’s side dashboard near the windshield.
Will this fix my transmission shifting problems?
If your shifting issues are caused by a faulty PCM, then yes, this part is the correct solution. The PCM controls transmission line pressure and shift solenoids, and a failing module can cause harsh shifts, delayed engagement, or incorrect gear selection.