Restore Peak Performance to Your GM Truck or SUV
Is your Silverado, Sierra, Yukon, or Escalade suffering from frustrating issues like a persistent check engine light, poor fuel economy, erratic shifting, or even a no-start condition? These are classic signs that the brain of your vehicle, the Powertrain Control Module (PCM), is failing. The PCM is the central command unit for your engine and transmission, and when it malfunctions, it can cause a cascade of problems that are difficult to diagnose. This replacement module is the definitive solution to get your vehicle running like new again.
The Plug-and-Play Solution You’ve Been Searching For
Forget expensive dealership visits and the hassle of finding a shop that can program a new computer. We take care of the most critical step for you. Before this module ships, we flash it with the latest official GM software updates, specifically calibrated to your vehicle using the VIN you provide. This ensures that when it arrives, it’s ready for installation, saving you time, money, and headaches. This is a direct replacement for multiple service numbers, including 89017750, 12582605, 12589463, 12602802, 89017734, and 28042802, guaranteeing a perfect match.
From the Diagnostic Bay
We recently had a 2005 GMC Sierra 2500 in the shop that was driving the owner crazy. It had a random misfire code that wouldn’t go away and a harsh shift from first to second gear. He had already spent a small fortune replacing spark plugs, ignition coils, and even the throttle body to no avail. After connecting our diagnostic tool, we noticed intermittent communication loss with the engine computer. Instead of continuing to replace perfectly good parts, we installed a pre-programmed PCM. The truck fired up instantly, idled smoothly, and shifted like it just rolled off the factory floor. It was a 30-minute fix for a problem that had cost the owner weeks of frustration.
Is Your Truck Showing Signs of PCM Failure?
A failing PCM can manifest in numerous ways. If you’re experiencing any of the following symptoms, a faulty engine computer is the likely culprit. This GM Truck PCM 12589463 is designed to resolve these common issues:
- ✔ Persistent Check Engine Light (CEL) with various trouble codes.
- ✔ Unexplained drop in fuel economy.
- ✔ Engine stalling, stuttering, or misfiring while driving.
- ✔ Harsh, delayed, or incorrect automatic transmission shifting.
- ✔ Vehicle cranks but refuses to start.
- ✔ Loss of power and sluggish acceleration.
- ✔ Inability for diagnostic scan tools to communicate with the module.
Installation and Post-Install Procedures
Installation is straightforward for anyone with basic mechanical skills. The PCM on most of these GM trucks and SUVs is located in the engine bay, typically on the driver’s side under the battery tray. Simply disconnect the negative battery terminal, remove the electrical connectors from the old module, unbolt it, and install the new one in its place. After reconnecting everything, your vehicle may require a security relearn procedure, also known as a Crankshaft Variation (CASE) relearn. This can often be done without special tools and is a necessary step to sync the new module with your vehicle’s anti-theft and engine systems. Instructions for this procedure are widely available online for your specific model.
Frequently Asked Questions
Do I need to get this computer programmed?
No. We handle the programming for you before we ship the part. Simply provide us with your vehicle’s 17-digit VIN during or after checkout, and we will flash the module with the correct, updated software for your specific vehicle.
What information do you need from me?
All we need is your vehicle’s VIN (Vehicle Identification Number). This allows us to load the exact factory software and calibrations for your truck’s engine, transmission, and options.
Will I need to do anything after I install it?
Yes, after installation, you will likely need to perform a security relearn procedure (often called a CASE relearn). This syncs the new PCM to your vehicle’s security system and crankshaft position sensor. This is a standard procedure for GM vehicles of this era.
Where is this part located on my truck?
On the vast majority of compatible models like the Silverado, Sierra, Tahoe, and Suburban, the PCM is located in the engine compartment on the driver’s side, often under or next to the battery inside a black plastic housing.
How do I confirm this GM Truck PCM 12589463 fits my vehicle?
Please review the detailed fitment list on this page. This module fits a wide range of 2003-2007 GM trucks and SUVs. Matching your vehicle’s year, make, and model to the list is the best way to ensure compatibility.