Restore Peak Performance to Your GM Truck or SUV
Is your Silverado, Sierra, Tahoe, or other GM vehicle suffering from frustrating issues like a persistent check engine light, erratic shifting, poor fuel economy, or a no-start condition? These are classic signs of a failing Powertrain Control Module (PCM), the central computer that manages your engine and transmission. Don’t let a faulty module keep your reliable truck off the road. This direct-fit PCM, part number 12589463, is the definitive solution to restore your vehicle’s performance, reliability, and efficiency.
The PCM is the brain of your vehicle’s operation. It processes data from dozens of sensors to precisely control fuel injection, ignition timing, transmission shift points, and emissions systems. When it fails, the entire powertrain can be compromised, leading to a cascade of performance problems. Replacing it with a generic, unprogrammed unit from a parts store means an expensive trip to the dealership for programming. We eliminate that step. This module arrives at your door fully programmed with the latest official GM software, specifically matched to your vehicle’s unique Vehicle Identification Number (VIN). It’s a plug-and-play solution designed to get you back on the road quickly and affordably.
Solving Issues with a Programmed GM PCM
A failing PCM can be difficult to diagnose, often mimicking other component failures. However, if you’ve been chasing sensor-related codes or intermittent electrical gremlins without success, the module itself is the likely culprit. Installing our Programmed GM PCM is a straightforward repair that addresses the root cause of these complex issues. We take the guesswork out of the equation by providing a unit that is pre-configured for your exact make, model, and options, ensuring seamless integration and correct operation from the moment of installation.
From the Diagnostic Bay
We recently had a 2006 Silverado 2500 with the 6.0L V8 in the shop. The owner complained of a harsh 1-2 shift and an intermittent P0606 (PCM Processor Fault) code that would put the truck into limp mode. He had already replaced the transmission solenoids and the throttle position sensor with no luck. We hooked up our diagnostic scanner and saw erratic data from the PCM. Instead of spending more hours on diagnostics, we recommended a pre-programmed module. After a quick installation and a security relearn procedure, the truck shifted perfectly, the code was gone, and the owner was thrilled to have his workhorse back in action. This is a common story for this platform, and a correctly programmed PCM is almost always the fix.
Common Symptoms of a Failing PCM
- ✔️ Persistent Check Engine Light with internal processor fault codes (e.g., P0601, P0606).
- ✔️ Unexplained engine stalling, misfiring, or rough idling.
- ✔️ Harsh, delayed, or incorrect automatic transmission shifting.
- ✔️ A sudden, significant decrease in fuel economy.
- ✔️ Complete no-start condition where the engine cranks but will not fire.
- ✔️ Failure to communicate with diagnostic scan tools.
- ✔️ Other warning lights, such as ABS or traction control, illuminating incorrectly.
Simple Installation Process
This PCM is a direct replacement for the original unit. Located in the engine bay (typically on the driver’s side, under the battery tray), installation involves disconnecting the battery, unplugging the electrical connectors, and unbolting the old module. Once the new module is bolted in and reconnected, you will need to perform a simple security relearn procedure (often called a CASE relearn). This procedure syncs the new PCM with your vehicle’s anti-theft system and can typically be done without special tools. Instructions for this process are widely available and easy to follow.
This module is a direct replacement for the following service numbers: 89017750, 12582605, 12589463, 12602802, 89017734, 28042802. Please verify your part number before ordering.
Frequently Asked Questions
Do I need to have this PCM programmed by a dealer?
No. We handle all the programming for you before shipment. Simply provide us with your vehicle’s VIN after purchase, and we will flash the module with the latest GM software for your specific vehicle.
What is a VIN and where can I find it?
VIN stands for Vehicle Identification Number. It’s a unique 17-digit code for your vehicle. You can find it on the driver’s side of the dashboard (visible through the windshield) or on the sticker in the driver’s side door jamb.
Is any special procedure required after installation?
Yes, you will likely need to perform a security relearn procedure, also known as a CASE (Crankshaft Angle Sensor Error) relearn. This syncs the new PCM to your vehicle’s anti-theft system and crankshaft position sensor. This procedure can typically be done without special tools.
Will this fix my check engine light?
If your check engine light is on due to an internal failure of your original PCM (common codes include P0601 through P0606), then this replacement part is the correct solution to resolve the issue.
How do I provide my VIN to you?
After you complete your purchase, we will send you a message with simple instructions on how to reply with your vehicle’s VIN. We cannot ship your order until we receive this information.