Is Your GM Truck or SUV Experiencing Frustrating Engine Problems?
If your 2003-2006 Yukon XL 2500, or another compatible GM vehicle, is suddenly stalling, shifting erratically, or refusing to start, the problem often points directly to a failing Powertrain Control Module (PCM). As a technician with over two decades of experience under the hood, I’ve seen countless trucks sidelined by faulty engine computers. Symptoms can range from a persistent Check Engine Light and false sensor codes to complete communication loss with your scan tool, leaving you stranded and guessing.
From the Shop Floor: Just last month, a 2005 Sierra 2500 with the 6.0L was towed in. It had a random no-start and the scanner couldn’t communicate with the PCM. After checking all the power and ground circuits to the module, we confirmed the PCM itself had an internal failureโa common issue on these trucks due to years of heat cycles and vibration. This module was the exact fix that got the owner back to work the next day.
The Direct-Fit Solution: A Pre-Programmed Powertrain Control Module
Don’t let a bad PCM keep your vehicle down. This is a direct-replacement Electronic Control Module, part number 12602802, that arrives at your door ready for installation. The critical difference is our professional programming service. Before we ship, we flash the module with the latest official GM software updates, tailored specifically to your vehicle using the VIN you provide. This ensures perfect communication between the engine, transmission, and all other onboard systems, restoring the performance and reliability you depend on.
Why Choose Our Programmed Yukon XL 2500 PCM?
- โ VIN-Programmed for Your Vehicle: We handle the complex programming, so you don’t have to. Just provide your VIN at checkout.
- โ Latest GM Software Updates: Solves many factory-original drivability issues and improves overall performance and fuel efficiency.
- โ No Dealer Visit Required: This module is prepared for a simple, plug-and-play installation, saving you hundreds in dealership programming fees and towing costs.
- โ Restores Lost Power & Function: Corrects issues like harsh shifting, poor idle, stalling, and inaccurate fuel gauge readings tied to a faulty PCM.
- โ Broad GM Compatibility: A reliable replacement for a wide range of trucks and SUVs from 2003-2007.
Simple, DIY-Friendly Installation Guide
You can get your truck back on the road in under an hour with basic hand tools. 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.
- Access the Module: You may need to remove the battery and its tray to get clear access to the old PCM.
- Disconnect the Old PCM: Carefully unplug the electrical harness connectors. They have locking tabs that need to be released before pulling.
- Swap the Modules: Unbolt the old PCM from its bracket and install the new one in its place.
- Reconnect Everything: Firmly plug the harness connectors into your new PCM until they click. Reinstall the battery tray and battery, then reconnect the negative terminal.
- Final Step: In some cases, a security relearn procedure may be necessary, which can typically be done without special tools. Instructions are readily available online for your specific model.
Expert Pro Tip: Inspect Your Connectors
Before plugging in your new PCM, take a moment to inspect the harness connectors. Use a small pick to gently check that the female pins haven’t spread open, which can cause a poor connection. A quick spray of electronics cleaner can also remove any hidden corrosion that could lead to future intermittent problems.
Guaranteed Compatibility
This module is a direct replacement for service numbers 89017750, 12582605, 12589463, 12602802, 89017734, and 28042802. It fits a vast array of GM models including the Silverado, Sierra, Suburban, Tahoe, Avalanche, Escalade, and Hummer H2. Please use the fitment chart to confirm this is the correct part for your specific year, make, and model.