Restore Peak Performance to Your GM Truck or SUV
Is your 2003-2007 HUMMER H2, Silverado, or Sierra running rough, stalling unexpectedly, or showing a persistent Check Engine Light? These are classic signs of a failing Powertrain Control Module (PCM), the central computer of your vehicle. A faulty PCM can cause a cascade of frustrating issues, from poor fuel economy and erratic transmission shifting to a complete no-start condition. Don’t let a bad module keep your powerful truck sidelined. This replacement PCM is the reliable, straightforward solution to get you back on the road with confidence.
We take the guesswork and hassle out of the repair. Unlike a generic part from a salvage yard, this module comes professionally programmed to your vehicle’s specific Vehicle Identification Number (VIN). We install the latest official GM software updates, which can often correct factory flaws and improve overall performance and drivability. This means you get a component that is truly ready for installation right out of the box, saving you from a costly and time-consuming trip to the dealership for programming.
From the Diagnostic Bay
I remember a 2006 Sierra 2500HD that came into my shop with a ghost of a problem. The owner said it would randomly stall at stoplights, but only on hot days after a long drive. There were no consistent trouble codes, just a history of a P0606 (PCM Processor Fault). After checking all the usual suspects—fuel pressure, wiring harnesses—I focused on the PCM. These modules are often mounted in the engine bay where they endure constant heat and vibration. In my experience, the internal circuit boards can develop micro-fractures that only cause issues when they expand with heat. We swapped in a pre-programmed PCM, and the problem vanished. It’s a textbook example of how a failing computer can create intermittent issues that are a nightmare to diagnose without experience.
Is Your Truck Showing These Signs of PCM Failure?
- ✔ Persistent Check Engine Light with codes like P0601, P0602, P0606, or U0100.
- ✔ The engine cranks but refuses to start.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Unexplained drop in fuel mileage.
- ✔ Intermittent stalling or rough idling.
- ✔ Communication errors with your scan tool.
A Straightforward Guide to Installation
- ✔ Safety First: Disconnect the negative terminal from your vehicle’s battery and secure it away from the post.
- ✔ Locate the PCM: On most compatible GM trucks and SUVs, the PCM is located in the engine bay on the driver’s side, often under or next to the battery tray.
- ✔ Disconnect the Harnesses: Carefully release the locking tabs on the electrical connectors and pull them straight out from the module. Avoid pulling on the wires themselves.
- ✔ Remove the Old Module: Unbolt the PCM from its mounting bracket. It’s typically held in place by a few bolts.
- ✔ Install the New PCM: Mount your new, pre-programmed PCM onto the bracket and securely fasten the bolts.
- ✔ Reconnect Everything: Firmly plug the electrical harnesses back into the new module until they click into place. Reconnect the negative battery terminal.
- ✔ Final Steps: In many cases, the vehicle will start and run perfectly. However, some vehicles may require a security relearn procedure, which can often be done without special tools. Instructions can easily be found online for your specific model.
Verified Vehicle Compatibility
This Powertrain Control Module is a direct-fit replacement for a wide range of General Motors trucks and SUVs. It is compatible with service numbers 89017750, 12582605, 12589463, 12602802, and 89017734. Please verify your model and year from the list below. Providing your VIN during checkout ensures we send you a perfectly matched and programmed part.
- HUMMER H2: 2003, 2004, 2005, 2006, 2007
- Cadillac Escalade, ESV, EXT: 2003-2006
- Chevrolet Avalanche 1500: 2003-2006
- Chevrolet Silverado 1500, 2500, 3500: 2003-2007 (Classic Body Style)
- Chevrolet Suburban 1500, 2500: 2003-2006
- Chevrolet Tahoe: 2003-2006
- GMC Sierra 1500, 2500, 3500: 2003-2007 (Classic Body Style)
- GMC Yukon, Yukon XL 1500, Yukon XL 2500: 2003-2006
- And more… (including select Isuzu Ascender, Chevrolet SSR, GMC Envoy XL, Chevrolet Trailblazer EXT models)
Frequently Asked Questions
Do I need to program this module?
No. This PCM arrives at your door pre-programmed with the latest GM software for your vehicle’s specific VIN. It is ready to install.
How do I provide my VIN?
After you complete your purchase, you will need to send us a message with your 17-digit VIN. We cannot ship the part until we receive this information.
Where is the PCM located on my 2003-2007 HUMMER H2?
On the HUMMER H2 and most compatible GM trucks, the PCM is found in the engine compartment on the driver’s side, mounted near the battery and fuse box.
What is a CASE Relearn and will I need to do one?
A Crankshaft Variation Relearn (CASE) synchronizes the PCM with the crankshaft position sensor. While not always required after a PCM swap, a mechanic with a capable scan tool may need to perform this procedure if you get a P1336 trouble code after installation.
Is this a reliable, long-term fix?
Absolutely. By addressing common failure points and loading the latest stable software from GM, this module is designed to restore factory operation and provide lasting reliability.
What if my original part number is slightly different?
This module replaces several service numbers, including 89017750, 12582605, 12589463, and 12602802. As long as your vehicle is on the compatibility list, our VIN-based programming ensures it will work correctly.