Is Your GM Truck or SUV Running Rough?
If you’re dealing with frustrating issues like a persistent check engine light, erratic engine behavior, poor fuel economy, or harsh transmission shifting, the root cause might be a failing Powertrain Control Module (PCM). As the central computer for your vehicle, the PCM is responsible for managing everything from fuel injection and ignition timing to transmission shift points and emissions controls. When it starts to fail, it can create a cascade of problems that are difficult to diagnose and can leave your vehicle unreliable or even undrivable.
Don’t let a faulty computer keep you off the road. This is a direct-fit replacement Powertrain Control Module, compatible with service number 28042802 and a wide range of other GM part numbers. We take the guesswork and hassle out of the replacement process. Unlike a generic part from a local store, this module arrives at your door fully programmed to your vehicle’s specific Vehicle Identification Number (VIN). This ensures perfect communication with all other modules on your vehicle and loads the latest factory software from GM, often resolving issues that were present even with the old unit.
From the Diagnostic Bay
We had a 2005 Silverado 2500 come into the shop with a complaint of intermittent stalling and a no-start condition, especially when hot. The customer had already replaced the fuel pump and crankshaft position sensor with no luck. Scans showed a loss of communication with the PCM. Before condemning the module, we always check the fundamentals. We inspected the PCM’s power and ground circuits and found a corroded ground wire on the engine block. After cleaning and re-securing the ground, the truck ran perfectly. While the symptoms pointed directly to a bad PCM, a simple wiring issue was the real culprit. Always check your main power and ground connections to the module before ordering a replacement—it could save you time and money.
Symptoms of a Failing Powertrain Control Module
- ✔ Persistent Check Engine Light (CEL) with various trouble codes
- ✔ Engine stalling, stumbling, or misfiring
- ✔ No-start or hard-starting conditions
- ✔ Poor or inconsistent engine performance
- ✔ Decreased fuel efficiency
- ✔ Harsh or erratic automatic transmission shifting
- ✔ Failure to pass emissions testing
- ✔ Communication errors with diagnostic scan tools
The Solution: A VIN-Programmed GM PCM 28042802
This isn’t just a part; it’s a complete solution. The critical step in replacing a modern vehicle computer is the programming. Without it, the vehicle’s anti-theft system will prevent the engine from starting, and the module won’t have the correct operational parameters for your specific engine, transmission, and options. Our process eliminates the need for an expensive trip to the dealership for programming. Simply provide us with your vehicle’s VIN during or after checkout, and our technicians will flash the module with the latest, most up-to-date software direct from GM. This ensures your vehicle operates exactly as the manufacturer intended, with optimal performance and efficiency.
This module is a direct replacement for service numbers 89017750, 12582605, 12589463, 12602802, 89017734, and 28042802, and fits a massive range of popular GM trucks and SUVs, including the Chevrolet Silverado, Tahoe, Suburban, Avalanche, GMC Sierra, Yukon, Cadillac Escalade, and Hummer H2 from approximately 2003 to 2007. Please verify the fitment list to ensure compatibility with your exact model and year.
Frequently Asked Questions
What is VIN programming and why is it necessary?
VIN programming is the process of loading your vehicle’s specific software onto the PCM. This software is unique to your VIN and tells the computer about your engine size, transmission type, tire size, gear ratios, and other options. It is absolutely necessary for the vehicle to start and run correctly and for the anti-theft system to function.
How do I provide my VIN?
After you complete your purchase, you will receive instructions on how to send us your 17-digit VIN. You can typically reply to your order confirmation email or use a contact form on our website. We cannot ship your part until we receive your VIN.
Is any additional programming needed after installation?
In most cases, this module is plug-and-play. However, some GM vehicles may require a security relearn procedure and/or a Crankshaft Variation (CASE) relearn. These are simple procedures that can often be done without special tools. Instructions can be readily found online for your specific vehicle.
Where is the PCM located on my vehicle?
On most of the compatible GM trucks and SUVs, the PCM is located in the engine bay, on the driver’s side, next to the battery or air filter box. It’s a silver metal box with several large electrical connectors.
How do I know if this part number is correct for my vehicle?
The best way is to match the service number from your original PCM. This module replaces several common service numbers, including 28042802, 12602802, and others listed in the description. You can also use our vehicle fitment guide to confirm compatibility.