Restore Peak Performance to Your GM Truck or Van
Is your Silverado, Sierra, or Express van running rough, shifting erratically, or showing a persistent Check Engine Light? The Powertrain Control Module (PCM), often called the Engine Control Module (ECM), is the central computer responsible for managing your vehicle’s engine and transmission. When it fails, it can cause a wide range of frustrating and difficult-to-diagnose issues. This replacement PCM, part number 89017749, is the definitive solution to get your truck back to factory-spec operation without the high cost and hassle of a dealership visit.
From the Diagnostic Bay
We had a 2006 Silverado 2500 with the 8.1L come in that was driving the owner crazy. It would randomly stall at stoplights, and the transmission would sometimes refuse to shift out of second gear. He had already replaced the throttle body and a transmission solenoid based on codes, but the problem persisted. We ran a full diagnostic and found communication errors pointing back to the PCM. After installing a VIN-programmed module like this one, all the ghost-like issues vanished. The truck ran smoother than it had in years. It’s a great reminder that the PCM is the foundation of the entire powertrain system.
Is Your 2005-2007 Silverado 3500 PCM Failing?
A faulty PCM can manifest in numerous ways, often mimicking other component failures. Before you start replacing expensive sensors or transmission parts, check if your vehicle is exhibiting any of the classic signs of a failing powertrain computer. Getting the core problem right the first time saves you time, money, and immense frustration.
Common Symptoms of a Bad PCM
- ✔️ Persistent Check Engine Light (CEL) with various codes
- ✔️ Engine stalling, stumbling, or misfiring
- ✔️ Rough or inconsistent idling
- ✔️ Harsh, erratic, or delayed transmission shifting
- ✔️ A complete no-start or hard-starting condition
- ✔️ Decreased fuel economy for no apparent reason
- ✔️ Loss of power and poor acceleration
- ✔️ Inaccurate or non-functional dashboard gauges
The Plug-and-Play Solution
What sets this module apart is our professional programming service. When you purchase this part, you provide us with your vehicle’s 17-digit Vehicle Identification Number (VIN). We then flash the module with the latest, most stable GM-certified software specific to your exact vehicle configuration. This ensures that when the part arrives, it’s ready for installation. It correctly communicates with your engine, transmission, anti-lock brakes, and other onboard systems, eliminating the need for a separate, costly programming appointment.
This module is a direct replacement for part numbers 89017749, 12589462, and 12602801 and fits a wide range of GM vehicles, including the Chevrolet Silverado, GMC Sierra, Express, Savana, and more. Please verify the extensive fitment list to confirm compatibility with your specific model and engine.
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 your vehicle’s VIN during or after checkout, and the module will arrive ready to install.
What is a “CASE learn” or crankshaft relearn procedure?
After installation, some vehicles may require a crankshaft position sensor relearn (also known as CASE learn) to clear certain trouble codes. This is a simple procedure that can be performed with most professional-grade scan tools and is often necessary when replacing the PCM.
Where is the PCM located on my 2005-2007 Silverado?
On most Silverado and Sierra pickups from this era, the PCM is located in the engine bay on the driver’s side, typically under or near the battery tray.
Will this fix my check engine light?
If the check engine light is caused by an internal failure of your original PCM, then yes, this part will resolve the issue. However, if the light is on due to a faulty sensor or another component, that separate issue will still need to be addressed.
Is this a new or used part?
This is a high-quality, inspected, and tested original equipment part that has been professionally programmed with the latest software for your vehicle, ensuring reliable performance and compatibility.