Restore Peak Performance to Your GM Truck or SUV
Is your HUMMER H2, Silverado, Sierra, or Tahoe suffering from baffling electrical issues, a persistent check engine light, or poor engine performance? The Powertrain Control Module (PCM), often called the engine’s brain, is frequently the culprit. This vital component manages everything from fuel mixture and ignition timing to transmission shift points and emissions controls. When it fails, it can cause a cascade of problems that are frustrating to diagnose and can leave your vehicle unreliable. This replacement Powertrain Control Module, service number 28042802, is the definitive solution to restore your vehicle’s factory performance and reliability.
We had a 2005 Silverado 2500 with the 6.0L come in with a complaint of intermittent stalling at stoplights and a random P0300 misfire code that mechanics had been chasing for weeks. They had replaced plugs, wires, and even the crankshaft position sensor to no avail. The truck would run fine for days, then suddenly die. After running a full diagnostic, we noticed the PCM was slow to communicate and occasionally dropped data packets. We suspected internal logic failure. Instead of a costly and time-consuming dealer visit, the owner opted for one of our pre-programmed modules. After a straightforward installation and a quick security relearn, the truck ran perfectly. The stalling vanished, the codes never returned, and the owner was back on the road with a reliable workhorse. It’s a classic case of how a failing computer can mimic a dozen other mechanical problems.
Is Your HUMMER H2 PCM Failing?
A faulty engine computer can manifest in numerous ways, often mimicking other sensor or mechanical failures. If you’re experiencing any of the following, it’s a strong indication that your PCM needs attention. This module is the correct fix for a wide range of GM vehicles, including the powerful HUMMER H2 PCM which is known to develop issues over time.
Common Symptoms of a Bad PCM:
- ✔ Check Engine Light is on with various, often inconsistent, trouble codes.
- ✔ Engine stalling, stumbling, or hesitating during acceleration.
- ✔ Noticeable decrease in fuel economy.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Vehicle fails to start, or starts and immediately stalls (no-start condition).
- ✔ Communication errors with diagnostic scan tools.
- ✔ Failure to pass state emissions testing.
Plug-and-Play Solution with VIN Programming
The biggest challenge when replacing a modern vehicle’s computer is programming. An unprogrammed module simply will not work, leaving your vehicle immobilized. We eliminate this expensive and inconvenient step. When you purchase this module, we will flash it with the latest GM-certified software updates specifically for your vehicle’s Vehicle Identification Number (VIN). This ensures that the PCM is perfectly matched to your engine, transmission, and factory options. This VIN-specific programming makes installation as simple as possible, often only requiring a simple security relearn procedure that you can perform yourself.
This module is a direct replacement for multiple service numbers, including 89017750, 12582605, 12589463, 12602802, and 89017734. By providing your VIN, you guarantee you receive a perfectly configured computer, ready to get your truck back to its dependable, powerful self.
Frequently Asked Questions
Do I need to program this PCM?
No. We handle the programming for you before shipment. Simply provide us with your vehicle’s VIN after you place your order, and we will flash the module with the correct factory software for your specific vehicle.
Where is the PCM located on my 2005 HUMMER H2?
On most compatible models, including the HUMMER H2, Silverado, and Tahoe, the PCM is located in the engine bay on the driver’s side (LH), under or near the battery tray.
What is a security or CASE relearn, and will I need to do it?
After installation, your vehicle’s anti-theft system may need to be synchronized with the new PCM. This is a simple procedure that typically involves turning the key to the ‘ON’ position for 10-15 minutes. A CASE (Crankshaft Angle Sensor Error) relearn may also be needed to clear certain codes, which requires a capable scan tool, though the vehicle will still run and drive without it.
Is this a direct replacement for my original part?
Yes, this module is a direct replacement for any of the service numbers listed, including 28042802, 12602802, and others. Our VIN programming ensures it functions identically to your original module, but with the benefit of the latest software updates.
How do I provide my VIN number?
After you complete your purchase, you will receive instructions on how to send us your 17-digit VIN. We cannot ship your order until we receive and validate your VIN.