Restore Peak Performance to Your GM Truck or SUV
Is your 2003-2006 GMC Yukon XL 2500, or another compatible GM vehicle, suffering from frustrating and unpredictable issues? Problems like a persistent Check Engine Light, rough idling, stalling, or a complete no-start condition often point directly to a failing Powertrain Control Module (PCM). As the central computer for your engine and transmission, a faulty PCM can cripple your vehicle’s reliability and performance. This replacement PCM, part number 12589463, is the definitive solution to get your truck back on the road and running like it should.
We take the guesswork and high cost out of the repair process. Unlike a generic module from a parts store, each unit we ship is professionally programmed with the latest official GM software updates, tailored specifically to your vehicle’s VIN. This critical step ensures seamless communication with your truck’s other electronic systems and provides a true plug-and-play experience, saving you a costly trip to the dealership for programming.
Case Study: A Tricky Diagnosis
I recently had a 2005 Silverado 2500 with the 6.0L in my bay that was a real head-scratcher. The owner complained of an intermittent no-start condition with no rhyme or reason—sometimes it would fire right up, other times it was completely dead. There were no consistent trouble codes, just a few random communication errors (U-codes) that would come and go. After verifying the battery, grounds, and ignition switch were solid, I focused on the PCM. These modules, located under the battery tray, are susceptible to heat cycles and corrosion over time. On a hunch, I swapped in one of our pre-programmed modules. The truck fired up instantly and has run flawlessly since. It’s a classic failure I’ve seen dozens of times; the internal processor develops micro-fractures, causing these maddening intermittent faults.
Is Your GM Truck Showing These Signs?
A failing PCM can manifest in numerous ways. If you’re experiencing any of the following, this module is the likely solution:
- âś” Check Engine Light is on with codes like P0601 (Internal Control Module Memory Check Sum Error) or P0606 (PCM Processor Fault).
- âś” Engine cranks but will not start.
- âś” Unexplained stalling or hesitation while driving.
- âś” Noticeable decrease in fuel economy.
- âś” Harsh or erratic automatic transmission shifting.
- âś” Communication errors with scan tools or other modules (U-codes).
- âś” Loss of spark or fuel injector pulse.
A Straightforward Guide to Installation
Installing your new Yukon XL 2500 PCM is a manageable job for a confident DIYer. While a security relearn procedure is required, it doesn’t necessitate a professional scan tool. Follow these general steps:
- Safety First: Disconnect the negative terminal from your vehicle’s battery and secure it away from the post.
- Locate the PCM: On most of these GM trucks and SUVs, the PCM is located in the engine bay on the driver’s side, under the battery and battery tray.
- Access the Module: You will need to remove the battery and the plastic battery tray to gain access to the PCM and its mounting bracket.
- Disconnect and Remove: Carefully unplug the electrical connectors. They have locking tabs that need to be released. Once disconnected, unbolt the old PCM from its bracket.
- Install the New PCM: Mount the new module in place and securely reconnect all electrical connectors. Reinstall the battery tray and the battery, then reconnect the negative terminal.
- Perform Security Relearn: This step is crucial. Turn the key to the ‘ON’ position (don’t start the engine). The security light may be on or flashing. Leave the key ‘ON’ for 10-12 minutes, until the security light turns off. Turn the key ‘OFF’ for 10 seconds. Repeat this cycle two more times (for a total of three 10-minute cycles). After the third cycle, the vehicle will have learned the new PCM and should start.
Verified Vehicle Compatibility
This module is a direct replacement for service numbers 89017750, 12582605, 12589463, 12602802, 89017734, and 28042802, and fits a wide range of GM vehicles. Please verify your model and year from the list below. Note that for some 2004 models, matching the ID number 12602802 is important.
Frequently Asked Questions
Frequently Asked Questions
Do I need to get this PCM programmed by a dealer?
No. We program the module to your vehicle’s specific VIN before shipping it to you. It arrives ready for installation and the security relearn procedure.
What is the security relearn procedure?
It’s a required process that syncs the new PCM with your vehicle’s anti-theft system. It involves a simple 30-minute key-on/key-off procedure that you can do yourself in your driveway. Instructions are included above.
How do I provide my VIN?
After you complete your purchase, you will receive instructions on how to send us your 17-digit Vehicle Identification Number (VIN). We cannot ship your order until we receive this information.
Is this a reliable, long-term fix?
Absolutely. These modules are thoroughly inspected and programmed with the latest GM software, which often corrects drivability issues present in the original factory programming. It’s a dependable solution to restore your vehicle’s function.
Will this fix my transmission shifting problems?
In many cases, yes. The PCM also controls transmission functions, including shift points and line pressure. If your shifting issues are electronic in nature and caused by a faulty PCM, this part will resolve them.