Restore Peak Performance to Your GM Truck or SUV
Is your Silverado, Sierra, Tahoe, or other GM vehicle suffering from frustrating issues like a persistent check engine light, erratic shifting, stalling, or a no-start condition? These are classic signs of a failing Powertrain Control Module (PCM), the central computer that manages your vehicle’s engine and transmission. A faulty PCM can disrupt everything from fuel delivery and ignition timing to transmission shift points, leading to poor performance, decreased fuel economy, and potential emissions test failures. Don’t let a failing computer keep your reliable truck off the road. This direct-fit PCM is the definitive solution to restore your vehicle’s factory performance and reliability.
The Brain of Your Vehicle’s Operation
The PCM is arguably the most critical electronic component in your modern GM vehicle. It constantly processes data from dozens of sensors throughout the engine and drivetrain. It monitors engine speed, throttle position, oxygen levels in the exhaust, coolant temperature, and much more. Using this information, it makes instantaneous adjustments to the fuel injectors, spark plugs, and transmission solenoids to ensure optimal power, efficiency, and low emissions. When this vital component begins to fail, the symptoms can be widespread and often difficult to diagnose, sometimes mimicking sensor or mechanical failures.
From the Diagnostic Bay
We had a 2005 Silverado 2500 with the 6.0L come into the shop with a complaint of intermittent stalling at stoplights and a check engine light that would come and go. The owner had already replaced the throttle position sensor and the crankshaft position sensor, but the problem persisted. Our initial scan showed no hard codes, only a history of communication loss with the PCM. After checking all the main power and ground connections to the module, we suspected an internal PCM fault. We installed one of our VIN-programmed modules, performed the security relearn, and the truck ran perfectly. The customer saved hundreds in further diagnostic time and unnecessary parts by addressing the root cause—the failing computer.
Why Choose Our Pre-Programmed GM PCM 28042802?
This isn’t just a replacement part; it’s a comprehensive, plug-and-play solution. The biggest hurdle in replacing a modern PCM is the complex programming required to make it communicate with your specific vehicle. Our service eliminates this obstacle entirely. When you order, you provide us with your vehicle’s 17-digit VIN. Our technicians then flash the module with the latest, most up-to-date software directly from GM for your exact vehicle configuration. This ensures that all factory settings, transmission strategies, and emissions parameters are perfectly matched. This process addresses many drivability issues that may have been fixed by software updates since your vehicle was new. This specific GM PCM 28042802 is a direct replacement for several service numbers, including 89017750, 12582605, 12589463, and 12602802, ensuring broad compatibility across the GM truck and SUV lineup from 2003-2007.
Common Symptoms of a Failing Powertrain Control Module
- ✔ Unexplained Check Engine Light illumination, often with communication-related trouble codes (U-codes).
- ✔ Poor engine performance, including hesitation, misfires, or sudden stalling.
- ✔ Inconsistent or harsh automatic transmission shifting, or getting stuck in one gear.
- ✔ Complete no-start condition where the engine cranks but will not fire up.
- ✔ Noticeable decrease in fuel efficiency.
- ✔ Communication errors when trying to connect a diagnostic scan tool.
- ✔ Failure to pass state emissions inspections.
Installation and Setup
Installation is straightforward for a DIY mechanic with basic tools. The PCM is typically located in the engine bay, on the driver’s side under the battery tray. After disconnecting the vehicle’s battery, you can unbolt the old module, disconnect the wiring harnesses, and install the new one in its place. Once the new module is connected and the battery is reconnected, you will need to perform a simple security relearn procedure. This procedure syncs the new PCM with your vehicle’s anti-theft system and can usually be done without special tools. Instructions for this procedure are readily available and we can provide guidance if needed. This final step is crucial for the vehicle to start and run with the new computer.
Frequently Asked Questions
What information do I need to provide for programming?
After placing your order, you must provide us with your vehicle’s 17-digit Vehicle Identification Number (VIN). This allows us to load the exact GM-certified software for your truck’s engine, transmission, and options.
Is this PCM ready to install right out of the box?
Yes, the module arrives fully programmed to your VIN. The only additional step required after physical installation is a security relearn procedure, which pairs the new module to your vehicle’s anti-theft system.
What is a security relearn and is it difficult?
The security relearn (also known as a CASE relearn) is a simple procedure that typically involves turning the key to the ‘ON’ position for 10-15 minutes, then off, and repeating this cycle three times. This allows the vehicle’s Body Control Module to recognize the new PCM. It does not require a mechanic or special tools.
How do I know if this part number will fit my vehicle?
This module replaces multiple service numbers, including 28042802, 12602802, and 89017750. Please check the extensive fitment list on this page or match the service number on your current module to ensure compatibility.
Will this fix my check engine light?
If the check engine light is caused by an internal failure of the PCM, then yes, this part will resolve the issue. It is always recommended to have the trouble codes professionally diagnosed to rule out sensor or wiring issues before replacing the PCM.