Restore Peak Performance to Your GM Truck or SUV
Is your Silverado, Sierra, Tahoe, or other GM vehicle suffering from erratic engine behavior, poor fuel economy, or a persistent Check Engine Light? These are classic signs of a failing Powertrain Control Module (PCM), the central computer that manages your engine’s most critical functions. Don’t let a faulty computer keep you off the road. This direct-fit replacement PCM, part number 12589463, is the reliable, straightforward solution to get your truck running like new again.
The PCM is the brain of your vehicle’s powertrain, controlling everything from fuel injection and spark timing to transmission shift points and emissions systems. When it begins to fail, it can cause a cascade of frustrating and potentially damaging issues. Our service eliminates the guesswork and costly dealership visits. We pre-program this module with your vehicle’s specific Vehicle Identification Number (VIN) and install the latest, most stable software updates directly from GM. This ensures perfect compatibility and optimal performance right out of the box.
From the Diagnostic Bay
We had a 2005 Sierra 2500 come in with a complaint of harsh shifting and intermittent stalling at stoplights. The owner had already replaced the throttle position sensor and the mass air flow sensor, but the problem persisted. After hooking up our scanner, we noticed erratic data from multiple sensors, but none were consistently failing their self-tests. This pointed us to the central processor. Instead of chasing phantom sensor codes, we checked the PCM. A quick swap with one of our pre-programmed units confirmed our suspicion. The truck immediately ran smoothly, shifted perfectly, and all the strange sensor readings stabilized. It’s a common scenario: drivers spend hundreds on sensors when the root cause is the computer processing the data incorrectly.
Is Your Vehicle Showing Signs of PCM Failure?
A failing engine computer can manifest in numerous ways. If you’re experiencing any of the following, a faulty PCM could be the culprit:
- ✔ Check Engine Light is on with various, often unrelated, trouble codes (P-codes).
- ✔ Engine stalling, stumbling, or misfiring for no apparent reason.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ A noticeable drop in fuel efficiency.
- ✔ The engine cranks but refuses to start (no-start condition).
- ✔ Communication errors with diagnostic scan tools.
- ✔ Failure to pass state emissions testing.
The Superior Solution: A VIN-Programmed GM Truck PCM 12589463
Why choose our programmed module over a generic one from a local parts store or salvage yard? The answer is simple: precision and convenience. A PCM from another vehicle will not work correctly in yours without proper programming. It can lead to a no-start situation, incorrect engine and transmission operation, and incompatibility with your vehicle’s anti-theft system. We handle the complex programming for you. By providing your VIN upon purchase, you receive a unit that is truly plug-and-play. We flash it with the correct calibration files for your specific make, model, year, and engine, ensuring a seamless installation and immediate results.
This module is a direct replacement for multiple service numbers, including 89017750, 12582605, 12589463, 12602802, 89017734, and 28042802. Please verify your part number or consult our extensive fitment list to confirm compatibility with your vehicle.
Frequently Asked Questions
Do I need to program this PCM?
No. This PCM comes fully programmed to your vehicle’s VIN. We flash it with the latest GM software updates before shipping, so it’s ready for installation right out of the box.
How do I provide my vehicle’s VIN?
After you complete your purchase, you will receive instructions on how to send us your VIN. You can also add it as a note to your order during checkout. We cannot ship the part until we have your VIN.
Where is the PCM located on my truck?
On most compatible GM trucks and SUVs like the Silverado, Sierra, and Tahoe, the PCM is located in the engine bay on the driver’s side, underneath or next to the battery tray.
Will any additional procedures be needed after installation?
In most cases, it is a simple plug-and-play installation. However, some vehicles may require a security relearn procedure or a Crankshaft Variation (CASE) relearn, which can be performed with a capable bi-directional scan tool.
My original part number is different. Will this still work?
Yes, this part number 12589463 supersedes and is compatible with several other service numbers, including 89017750, 12582605, 12602802, and more. As long as your vehicle is on the compatibility list, this module will work perfectly once programmed to your VIN.