Is Your GM Truck Running Rough? Get Back on the Road Fast.
If you’re dealing with a frustrating check engine light, poor fuel economy, stalling, or a no-start condition on your Silverado 3500, a failing Powertrain Control Module (PCM) is a very likely culprit. Over my 20+ years turning wrenches, I’ve seen how a faulty PCM can create a cascade of confusing problems that seem impossible to pin down. This isn’t just a replacement part; it’s the central command for your engine and transmission, and getting a reliable one is critical to restoring your truck’s performance and dependability.
Expert Pro Tip: Check Before You Replace
Before you condemn your PCM, take a moment to inspect the main connector harnesses. I’ve seen countless cases where intermittent issues were caused by corrosion on the pins or a loose connection. Unplug the connectors (with the battery disconnected!), spray them with a quality electronics cleaner, and look for any green or white powder. A clean, tight connection is essential for the PCM to function correctly.
The Simple Solution: A VIN-Programmed PCM
Forget about expensive dealership visits and the hassle of finding a shop that can program a new module. We handle the complex part for you. When you order, simply provide us with your vehicle’s 17-digit VIN. We will flash this PCM with the latest, most stable software updates directly from GM, ensuring it’s a perfect match for your truck’s specific configuration. It arrives at your door ready for a straightforward installation.
- โ VIN-Programmed for Your Truck: We load the correct software for your specific 2003-2007 Silverado 3500, ensuring seamless communication with all other vehicle systems.
- โ Latest GM Software Updates: Benefit from improved drivability, fuel efficiency, and performance tweaks released by the manufacturer after your truck was built.
- โ Solves Common Issues: A direct fix for error codes, harsh shifting, random stalling, and other frustrating electronic gremlins.
- โ No Additional Programming Needed: This module is ready to be installed right out of the box, saving you time and money.
Plug-and-Play Installation: No Dealer Visit Required
You can do this job yourself with basic hand tools. The PCM on most of these trucks is located on the driver’s side, right under the battery tray. Just follow these simple steps:
- Safety First: Disconnect the negative battery terminal and wait a few minutes for the system to discharge.
- Access the Module: You will likely need to remove the battery and the battery tray to get clear access to the old PCM.
- Disconnect the Harnesses: Carefully unplug the electrical connectors from the old module. Note their color and orientation.
- Swap the Modules: Unbolt the old PCM and install the new one in its place.
- Reconnect Everything: Plug the harnesses into the new PCM, reinstall the battery tray and battery, and reconnect the negative terminal.
- Final Check: Start the engine. The check engine light should be off, and your truck should run smoothly. A security relearn procedure may be required, which typically involves cycling the key and can be done in your driveway.
Guaranteed Compatibility
This module is a direct replacement for several service numbers, ensuring a perfect fit and function. Please verify your part number against this list. This unit replaces: 89017750, 12582605, 12589463, 12602802, 89017734, and 28042802. This part is also compatible with a wide range of other GM trucks and SUVs from this era, including the Sierra, Tahoe, Yukon, Escalade, and Hummer H2. Please use the fitment chart to confirm it’s right for your vehicle.