Is Your Sierra 3500 Running Rough or Not Starting?
As a mechanic with over two decades of experience under the hood, I’ve seen countless trucks sidelined by a faulty Powertrain Control Module (PCM). A failing PCM in your 2005-2007 Sierra 3500 can cause a frustrating array of problems, from a persistent check engine light and poor fuel economy to harsh shifting and even a no-start condition. You’re not just losing performance; you’re losing the reliability you depend on from your workhorse truck.
This isn’t just a replacement part; it’s a direct solution. We are offering a genuine GM Electronic Control Module that is professionally programmed to your truck’s specific Vehicle Identification Number (VIN). This critical step ensures that all factory settings, engine parameters, and transmission strategies are perfectly matched to your vehicle’s original build. We install the latest GM-authorized software updates, often correcting drivability issues you might not have even known were software-related.
Why Choose Our Programmed 2005-2007 Sierra 3500 PCM?
Getting your truck back to peak condition shouldn’t be a complicated ordeal. Forget about expensive dealership visits, towing fees, and the hassle of coordinating programming appointments. This module arrives at your door ready for installation. It’s the most straightforward and reliable way to restore your truck’s brainpower.
- โ VIN-Programmed for Your Truck: We handle all the programming before shipping. Just provide your VIN at checkout, and we do the rest.
- โ Plug-and-Play Installation: Once installed, this module is ready to go. In most cases, no further procedures are needed.
- โ Solves Common Issues: Effectively resolves problems like random stalling, communication error codes, erratic engine behavior, and transmission shifting faults.
- โ Latest GM Software: Benefit from the most recent drivability and performance enhancements from General Motors.
- โ Broad Compatibility: This module, part number 12602801, also serves as a direct replacement for part numbers 12589462 and 89017749, fitting a wide range of GM trucks and vans.
Expert Pro Tip: Check for Battery Acid Contamination
In my shop, a common killer of these PCMs on Sierra and Silverado pickups is a leaking battery. The module is often located directly under or near the battery tray. Before installing your new PCM, thoroughly inspect the wiring harness connectors and the mounting area for any signs of white or green corrosion from battery acid. Clean any residue with a wire brush and a battery terminal cleaner solution. A clean connection is absolutely critical for the new module’s longevity and performance.
Simple Installation to Get You Back on the Road
You don’t need to be a master technician to install this part. With basic hand tools, you can have your truck running correctly in under an hour.
- Safety First: Disconnect the negative battery terminal and wait a few minutes for the system to discharge.
- Locate the PCM: On most 2005-2007 Sierra/Silverado models, the PCM is located in the engine bay on the driver’s side, under the battery tray or near the air filter housing.
- Disconnect Connectors: Carefully release the locking tabs and unplug the wiring harness connectors from the old module.
- Remove Old Module: Unbolt the old PCM from its mounting bracket.
- Install New Module: Mount your new, pre-programmed PCM, reconnect the harness connectors securely, and re-connect the negative battery terminal.
- Final Check: Start the engine and verify that the check engine light is off and the truck is running smoothly. A security relearn procedure may be required on some models, which can typically be done without special tools.