Restore Peak Performance to Your GM Truck or SUV
Is your Yukon, Tahoe, Silverado, or other GM vehicle suffering from baffling engine issues, a persistent check engine light, or unpredictable behavior? The Powertrain Control Module (PCM), the central computer for your engine and transmission, is often the root cause. This genuine GM PCM, service number 12602802, is the definitive solution to restore your vehicle’s factory performance, reliability, and efficiency. Unlike a generic part from an auto parts store, this module is professionally programmed to your vehicle’s specific Vehicle Identification Number (VIN) before it ships, ensuring a seamless and correct installation.
From the Diagnostic Bay
We had a 2005 Sierra 1500 in the shop that was driving the owner crazy. It had a random cylinder 3 misfire (P0303) that would only appear under heavy load. The owner had already replaced the spark plug, ignition coil, and fuel injector, but the problem persisted. After hours of diagnostics, we scoped the injector signal directly from the PCM and found the driver circuit was intermittently failing, cutting fuel to that cylinder. A new, correctly programmed PCM like this one solved the issue in minutes. It’s a reminder that when you’ve chased all the common culprits, it’s often the brain that’s the problem.
Common Symptoms of a Failing PCM
A failing computer can manifest in numerous ways, often mimicking other component failures. If you’re experiencing any of the following, a faulty PCM could be to blame:
- ✔ Persistent Check Engine Light (CEL) with communication error codes (e.g., U-codes) or multiple random codes.
- ✔ Unexplained drops in fuel economy.
- ✔ Engine stalling, stumbling, or running rough at idle.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ The engine cranks but refuses to start (no-start condition).
- ✔ Failure to pass an emissions test due to module-related faults.
The Right Solution: A VIN-Programmed 2003-2006 Yukon PCM
Don’t settle for a junkyard module that could have the same issues or require expensive dealership programming. We take the guesswork out of the repair. When you order, simply provide us with your VIN. Our technicians will flash the module with the latest, most up-to-date software directly from GM for your specific vehicle. This process ensures all factory settings, transmission shift points, and engine parameters are perfectly matched to your truck’s original specifications. This is a crucial step for the proper function of your vehicle’s complex systems.
This module is a direct replacement for a wide range of GM trucks and SUVs from 2003-2007, including the Avalanche, Escalade, Sierra, Silverado, Suburban, Tahoe, and Hummer H2. It is compatible with multiple service numbers, including 89017750, 12582605, 12589463, 12602802, 89017734, and 28042802. By providing your VIN, you guarantee you receive a perfectly compatible and updated module ready for installation.
Frequently Asked Questions
What is a PCM and why is programming important?
The Powertrain Control Module (PCM) is the main computer that controls your vehicle’s engine and transmission. Programming it to your VIN ensures it has the correct software for your specific engine, transmission, and options, which is critical for performance, fuel economy, and emissions.
Is this module difficult to install?
Physically, the module is straightforward to replace, typically located in the engine bay under the battery tray. After installation, you will need to perform a security relearn procedure, which usually involves a sequence of turning the key on and off. Some vehicles may also require a Crankshaft Variation (CASE) relearn with a capable scan tool for optimal performance.
How do I provide my VIN?
After you complete your purchase, you will receive instructions on how to send us your 17-digit VIN. We cannot program and ship the module without it.
Will this fix my check engine light?
If the check engine light is caused by a faulty PCM, then yes, this will resolve the issue. However, it’s essential to properly diagnose the vehicle first, as the light can be triggered by many other failing components. This module will fix issues directly related to the computer itself.
Is this a new part?
This is a high-quality, tested, and verified OEM part that has been programmed with the latest software for your vehicle. It is guaranteed to function to factory specifications.