Restore Peak Performance to Your GM Truck or SUV
The Powertrain Control Module (PCM) is the central command center of your vehicle, managing critical functions from fuel delivery and ignition timing to transmission shifting and emissions systems. When this vital component fails in your GM truck or SUV, it can lead to a host of frustrating and performance-robbing issues. This replacement PCM, part number 89017734, is the definitive solution to get your vehicle back on the road running smoothly and efficiently. It arrives pre-programmed with the latest GM software updates, tailored specifically to your vehicle’s Vehicle Identification Number (VIN).
From the Diagnostic Bay
We once had a 2005 Silverado 2500 come into the shop with what the owner was convinced was a failing transmission. It was shifting erratically, banging into gear, and sometimes seemed to get stuck. He had already spent money on a transmission fluid service with no improvement. After a quick scan, we noticed communication fault codes with the PCM. Instead of a costly transmission job, we installed a VIN-programmed PCM. The truck immediately began shifting perfectly. The PCM directly controls transmission line pressure and shift solenoids, and a faulty module can easily mimic a major mechanical failure. Always check the vehicle’s brain before performing major surgery.
Is Your Vehicle Exhibiting These Symptoms?
A failing PCM can manifest in various ways, often being misdiagnosed as other component failures. If you’re experiencing any of the following, a faulty PCM could be the culprit:
- ✔ Persistent Check Engine Light (CEL) that won’t go away.
- ✔ Engine stumbling, hesitating, or stalling unexpectedly.
- ✔ Noticeable decrease in fuel economy.
- ✔ Harsh, delayed, or erratic automatic transmission shifting.
- ✔ The engine cranks but refuses to start (no-start condition).
- ✔ Failure to pass emissions testing.
- ✔ Communication errors when using a diagnostic scan tool.
The Superior Solution for Your 2003-2007 Sierra 3500 PCM
Don’t settle for a generic, unprogrammed module that will require expensive dealer intervention. Our process is designed for simplicity and effectiveness. When you order, you provide us with your vehicle’s VIN. Our technicians then flash this module with the correct, updated software straight from GM’s database. This ensures that the PCM is a perfect match for your vehicle’s specific configuration, including engine size, transmission type, and emissions equipment. This VIN-specific programming is crucial for proper engine and transmission function, restoring the performance and reliability you expect from your truck.
Simple Installation Process
This module is a direct physical replacement for the original unit. On most compatible GM trucks and SUVs, the PCM is located in the engine bay, on the driver’s side, often under or next to the battery. While the physical swap is straightforward, a security relearn procedure is typically required after installation to sync the new PCM with your vehicle’s anti-theft system. This procedure can often be completed without special tools and involves a series of key cycles. We recommend disconnecting the battery before beginning the installation.
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 the extensive fitment list to ensure compatibility.
Frequently Asked Questions
What is a VIN and why do you need it for programming?
The VIN (Vehicle Identification Number) is your car’s unique 17-digit serial number. It contains vital information about the engine, transmission, and options your vehicle was built with. We use the VIN to load the exact factory software and the latest updates from GM, ensuring the PCM works perfectly with your specific truck.
Is this a plug-and-play part?
Almost. The module comes fully programmed to your VIN, so no dealer flashing is needed. However, you will need to perform a security relearn procedure after installation. This syncs the new PCM to your vehicle’s anti-theft system and keys. This procedure typically takes about 30 minutes and can be done without any special tools.
Will this fix my check engine light?
If the check engine light is caused by a faulty PCM, then yes, this part will resolve the issue. It’s important to have your vehicle properly diagnosed to confirm the PCM is the source of the problem before ordering.
Where is the PCM located on my vehicle?
On the vast majority of GM trucks and SUVs from this era (like the Silverado, Sierra, Tahoe, and Suburban), the PCM is located in the engine compartment on the driver’s side, mounted near the battery tray or fender well.
Do I need to send my old module (core) back?
No core charge or return is required for this particular part. You can recycle your old module locally.