Restore Peak Performance to Your GM Vehicle
Is your Chevrolet, GMC, Cadillac, or Hummer suffering from perplexing issues like a persistent check engine light, rough idling, stalling, or poor fuel economy? The Powertrain Control Module (PCM), the central computer of your engine and transmission, is often the culprit. This genuine GM PCM, part number 12602802, is the definitive solution to restore your vehicle’s factory performance, drivability, and reliability. It serves as a direct replacement for a wide range of popular trucks and SUVs from 2003 to 2007, ensuring a perfect fit and function.
From the Diagnostic Bay
We had a 2004 Silverado 2500 come in with an intermittent stalling issue that was driving the owner crazy. He had already replaced the throttle body and a couple of sensors, spending hundreds of dollars with no fix. After hooking up our diagnostic tools, we noticed erratic data coming from the PCM. The internal processors were failing under load. We installed a VIN-programmed module just like this one, performed the security relearn, and the truck ran perfectly. It’s a classic case where chasing symptoms instead of diagnosing the core problem—the failing computer—costs time and money.
Is a Failing 2003 SSR PCM Causing Your Problems?
The PCM is a complex component, and its failure can manifest in numerous ways. If you’re experiencing any of the symptoms below, a faulty module could be to blame. Replacing it with our pre-programmed unit can resolve these issues and get you back on the road with confidence.
Common Symptoms of a Bad PCM
- ✔ Persistent Check Engine Light (CEL) with various trouble codes.
- ✔ Engine stalling or shutting off unexpectedly while driving.
- ✔ Rough or erratic idling.
- ✔ Difficulty starting the engine or a complete no-start condition.
- ✔ Noticeable decrease in fuel efficiency.
- ✔ Harsh or incorrect automatic transmission shifting.
- ✔ Failure to pass state emissions tests.
- ✔ Communication errors with diagnostic scan tools.
The Simple, Reliable Solution
Don’t let a faulty computer keep your truck or SUV sidelined. This module is not just a replacement part; it’s a complete solution. We take the hassle out of the repair by programming the unit specifically for your vehicle using the VIN you provide. This critical step ensures that all systems communicate correctly, from the engine and transmission to the anti-theft system. The module arrives loaded with the latest GM-certified software updates, often improving upon the original factory programming for better performance and longevity.
Frequently Asked Questions
Do I need to have this module programmed by a dealer?
No. We handle the programming for you before shipment. Simply provide us with your vehicle’s 17-digit VIN during or after checkout, and it will arrive ready for installation.
Is this a true plug-and-play installation?
Yes, for the most part. After installing the programmed module, you will need to perform a simple security relearn procedure, also known as a CASE relearn. This syncs the new PCM to your vehicle’s anti-theft system and can typically be done in your driveway in about 30 minutes with no special tools required. Instructions are readily available online for your specific model.
How do I find my vehicle’s VIN?
Your VIN can be found on your vehicle’s registration, insurance card, or on a metal plate on the driver’s side of the dashboard, visible through the windshield.
How can I be sure this part fits my vehicle?
This PCM replaces several service numbers, including 89017750, 12582605, 12589463, and 12602802. Please review the detailed fitment list on this page. Matching your vehicle’s year, make, model, and engine size is the best way to confirm compatibility.
What if I install it and still have issues?
While this module often resolves the listed symptoms, it’s essential to ensure the root cause of the failure has been addressed. Issues like shorted sensors or wiring can damage a new module. Always ensure your vehicle’s electrical system is in good working order before installation.