Restore Peak Performance to Your GM Truck or SUV
Is your 2003-2007 GMC Sierra, Chevy Silverado, or other GM vehicle suffering from perplexing issues like a persistent check engine light, erratic shifting, poor fuel economy, or a no-start condition? The Powertrain Control Module (PCM), the central computer of your vehicle, is often the culprit. This vital component manages everything from fuel injection and ignition timing to transmission shift points and emissions controls. When it fails, it can cause a cascade of problems that are frustrating and difficult to diagnose. This replacement PCM, part number 28042802, is the definitive solution to restore your vehicle’s reliability and drivability.
The Plug-and-Play Solution: Pre-Programmed for Your Vehicle
Forget expensive dealership visits and the hassle of finding a local shop with the right equipment. We take the guesswork out of the repair. Before this module ships, we will program it with the latest GM-certified software updates specifically for your vehicle using the VIN you provide. This ensures that it’s a true plug-and-play component, ready for installation right out of the box. This VIN-matching process guarantees seamless communication between the PCM and all other modules on your truck, restoring its original factory performance and efficiency.
From the Diagnostic Bay
We had a 2005 Silverado 2500 come in with what the owner was convinced was a failing transmission. It was shifting hard between 1st and 2nd and sometimes wouldn’t shift into overdrive. He had already spent a small fortune on a fluid flush and new shift solenoids with no improvement. After hooking up our diagnostic scanner, we noticed the PCM was commanding shifts at the wrong time and sending erratic signals to the transmission control module. Instead of a costly transmission rebuild, we installed a VIN-programmed PCM just like this one. After a quick security relearn procedure, the truck was shifting as smoothly as the day it left the factory. It’s a classic case of the ‘brain’ causing issues that appear to be mechanical.
Symptoms of a Failing 2003-2007 Sierra PCM
A faulty PCM can manifest in numerous ways. If your vehicle is experiencing any of the following, it’s a strong indicator that your engine computer may need replacement. Proper diagnosis is key, but these are the most common signs of failure for this specific generation of GM trucks and SUVs.
- ✔ Unexplained Check Engine Light (CEL) illumination
- ✔ Engine stalling, stumbling, or misfiring
- ✔ Harsh or erratic automatic transmission shifting
- ✔ Complete no-start condition where the engine cranks but won’t fire
- ✔ Noticeable decrease in fuel economy
- ✔ Failure to pass emissions testing
- ✔ Communication errors with diagnostic scan tools
- ✔ Intermittent issues that seem to have no pattern
Guaranteed Fitment and Compatibility
This Electronic Control Module is a direct replacement for a wide range of popular GM models from 2003 to 2007, including the Sierra, Silverado, Tahoe, Yukon, Suburban, Escalade, and Hummer H2. It is compatible with multiple service numbers, including 89017750, 12582605, 12589463, 12602802, and 89017734. By providing your VIN, you ensure you receive the correctly programmed module for your specific make, model, engine, and options. Please refer to the detailed fitment list to confirm compatibility with your vehicle.
Frequently Asked Questions
Do I need to have this PCM programmed by a dealer?
No. This PCM comes fully programmed to your vehicle’s specific VIN before it is shipped. It arrives ready to be installed, saving you a trip to the dealership and additional programming fees.
What is a security relearn or CASE relearn?
After installation, your vehicle’s anti-theft system (Passlock/VATS) may need to be relearned to recognize the new PCM. This is a simple procedure that typically involves cycling the key and takes about 30 minutes. A CASE (Crankshaft Angle Sensor Error) relearn may also be required to clear certain trouble codes, which can be performed with most professional-grade scan tools.
Is this a difficult part to install?
For most of the listed vehicles, the PCM is located in the engine bay, typically under the battery tray on the driver’s side. Installation involves disconnecting the battery, removing the old unit, plugging in the new one, and reconnecting the battery. It is a straightforward process for someone with basic mechanical skills.
How do I provide my VIN?
After you complete your purchase, you will need to send us your 17-digit Vehicle Identification Number (VIN). We cannot program and ship your part without it. You can typically find your VIN on your driver’s side dashboard (visible through the windshield) or on the driver’s side door jamb sticker.
Will this fix my specific problem?
If your vehicle’s issues have been correctly diagnosed as a faulty PCM, this part is the solution. It will resolve problems directly caused by the computer. However, it will not fix underlying mechanical issues, faulty sensors, or wiring problems. We always recommend a thorough diagnosis before ordering.