Restore Peak Performance to Your GM Truck or SUV
Is your 2003-2007 GM truck, like the powerful Sierra Denali, Silverado, or Tahoe, suffering from baffling electrical issues, poor performance, or an illuminated Check Engine Light? The Powertrain Control Module (PCM), the central computer for your engine and transmission, is often the root cause. This vital component manages everything from fuel mixture and ignition timing to transmission shift points and emissions equipment. When it fails, it can lead to a host of frustrating and difficult-to-diagnose problems. This replacement PCM, part number 28042802, is the definitive solution to restore your vehicle’s reliability and drivability.
From the Diagnostic Bay
We once had a 2005 Silverado 2500 come into the shop with what the owner was convinced was a failed transmission. It was shifting erratically, slamming into gear, and sometimes refusing to shift at all. He had already spent a small fortune on fluid changes and solenoid packs at another shop. After plugging in our diagnostic scanner, we noticed intermittent communication loss with the PCM. We weren’t getting clean data. Instead of tearing into the transmission, we swapped in a known-good, programmed PCM. The truck immediately started shifting perfectly. The original PCM had internal circuit failure, sending corrupt signals to the transmission. This simple swap saved the customer from a costly and unnecessary transmission replacement.
Common Symptoms of a Failing PCM
- ✔ Persistent Check Engine Light (CEL) with communication error codes (e.g., U0100).
- ✔ Engine stalling, stumbling, or misfiring for no apparent reason.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ A sudden, unexplained drop in fuel economy.
- ✔ The vehicle cranks but refuses to start.
- ✔ Failure to communicate with OBD-II diagnostic scan tools.
- ✔ Multiple, unrelated sensor error codes appearing simultaneously.
The Superior Solution: VIN-Programmed for Your Vehicle
Don’t settle for a generic, unprogrammed module from a salvage yard that will cause more headaches. We take the guesswork out of the repair. When you order, you provide us with your vehicle’s VIN. Our technicians then flash this module with the latest, most stable GM-certified software specific to your truck’s exact build, including engine, transmission, and emissions options. This ensures that when you receive the part, it’s ready for installation, communicating flawlessly with all other modules in your vehicle. This is the most reliable way to ensure a correct and lasting repair for your Sierra Denali PCM and other compatible GM models.
Installation and Compatibility
This module is a direct replacement for service numbers 89017750, 12582605, 12589463, 12602802, 89017734, and 28042802. It fits a wide range of GM trucks and SUVs from 2003 to 2007, including the Escalade, Avalanche, Suburban, Hummer H2, and more. While the module is programmed to your VIN, some vehicles may require a simple security relearn procedure or a Crankshaft Variation (CASE) relearn after installation. These procedures can often be performed by a qualified technician with a professional scan tool and ensure the anti-theft system and engine sensors are perfectly synchronized with the new PCM.
Frequently Asked Questions
Why do you need my vehicle’s VIN?
Your VIN is essential. It allows us to load the exact GM software calibration for your truck’s specific engine, transmission, emissions system, and factory options. This ensures perfect compatibility and function right out of the box.
Is this part difficult to install?
The physical installation is straightforward, typically involving disconnecting the battery and swapping the module. However, some vehicles may require a security relearn or CASE relearn procedure with a capable scan tool to finalize the process and prevent starting issues.
Will this fix my specific problem?
If your vehicle’s issues match the common symptoms of PCM failure and have been properly diagnosed, this module is the correct solution. It resolves problems caused by internal hardware or software corruption in the original unit.
Is this a new or used part?
This is a high-quality, inspected, and tested replacement part, guaranteed to meet or exceed original equipment performance. Each unit is programmed with fresh, updated GM software.
What if my original part number isn’t listed?
The listed service numbers (e.g., 12602802, 89017750) are the most common replacements for this hardware type. If your number is different, please contact us with your VIN, and we can verify compatibility for you.