Is Your GM Truck or SUV Running Rough?
If you’re dealing with a persistent check engine light, unpredictable stalling, poor fuel mileage, or harsh shifting in your 2003-2006 GMC Yukon XL 2500, the problem often points directly to a failing Powertrain Control Module (PCM). As the central computer for your engine and transmission, a faulty PCM can cause a host of frustrating issues that can be difficult to diagnose. Don’t let a bad module keep your reliable truck off the road.
This is a direct-fit replacement PCM, service number 12589463, that solves these common problems. The best part? It arrives at your door fully programmed to your vehicle’s specific Vehicle Identification Number (VIN) with the latest GM software updates. This eliminates the most expensive and inconvenient part of the repair: a trip to the dealership for programming.
Why Our Programmed Yukon XL 2500 PCM is the Smart Choice
From my 20+ years of hands-on diagnostics, I’ve seen countless GM trucks of this era with confusing electrical issues. A customer’s 2005 Silverado 2500 came in last week with a stubborn misfire code that wouldn’t clear, even after he’d replaced plugs, wires, and coils. The real culprit was a weak injector driver inside the original PCM. Installing a properly programmed module like this one had his truck running perfectly in under 20 minutes. That’s the difference our service makes.
When you order from us, you’re getting more than just a part. You’re getting a complete, ready-to-install solution.
- โ No Dealer Visit Required: We flash the module with your VIN, so it’s ready to install right out of the box.
- โ Fixes Common Symptoms: Puts an end to issues like stalling, misfires (P0300-P0308), poor performance, and communication errors.
- โ Latest GM Calibrations: We ensure your module has the most recent software from General Motors, which often corrects factory bugs and improves performance and efficiency.
- โ Restores Communication: A functioning PCM allows all the vehicle’s modules (BCM, TCM, etc.) to communicate properly, restoring full functionality.
Expert Pro Tip from 20+ Years in the Shop: Before installing your new PCM, take a moment to inspect the wiring harness connectors. On these trucks, the PCM is often located under the battery tray. Over time, battery acid can leak and drip down, causing corrosion on the connector pins. Use a small brush and electrical contact cleaner to ensure the terminals are bright and clean. A poor connection is one of the top reasons for repeat failures.
Plug-and-Play Installation: Get It Done in Your Driveway
You don’t need to be a master technician to replace this module. With basic hand tools, you can have your truck back up and running quickly. The PCM is typically located in the engine bay on the driver’s side, under or near the battery.
- Safety First: Disconnect the negative terminal from your vehicle’s battery and secure it away from the post.
- Locate the PCM: Find the module mounted to the inner fender or near the airbox. It will have several large wiring harnesses connected to it.
- Disconnect the Harnesses: Carefully lift the locking levers on each connector and pull them straight out. Never force them.
- Unbolt the Old Module: Remove the bolts or nuts holding the PCM bracket in place and take out the old unit.
- Install the New PCM: Mount your new, pre-programmed module in the same location, reconnect the wiring harnesses, and ensure the locking levers click into place.
- Reconnect the Battery: Re-attach the negative battery terminal. Your vehicle is now ready to start. In most cases, no further security relearn procedure is needed.
Guaranteed Compatibility
This module is a direct replacement for service numbers 89017750, 12582605, 12589463, 12602802, 89017734, and 28042802, and fits a wide range of GM trucks and SUVs. Please use the fitment chart to confirm it is the correct part for your specific vehicle and options. Simply provide your VIN after purchase, and we’ll handle the rest.