Restore Peak Performance to Your GM Vehicle
Is your GMC Savana, Chevrolet Express, or Silverado plagued by frustrating issues like a persistent check engine light, poor fuel mileage, erratic shifting, or even a no-start condition? These are classic symptoms of a failing Powertrain Control Module (PCM), the central computer responsible for managing your vehicle’s engine and transmission. A faulty PCM can disrupt everything from fuel injection timing to transmission shift points, making your vehicle unreliable and inefficient. This replacement module, part number 89017749, is the definitive solution to restore your vehicle’s original performance and reliability.
The Critical Role of a Programmed Savana 3500 PCM
The PCM is more than just a simple component; it’s the brain of your vehicle’s operation. It constantly analyzes data from dozens of sensors to make real-time adjustments for optimal power, efficiency, and emissions. When it fails, the entire system is compromised. Simply swapping in a used module from another vehicle won’t work due to the specific Vehicle Identification Number (VIN) and security information programmed into each unit. Our service eliminates this problem. We flash this module with the latest official GM software updates, specifically calibrated to your vehicle’s VIN. This ensures seamless integration, correct operation of all systems, and a true plug-and-play installation experience.
Common Symptoms of a Faulty Powertrain Control Module
- ✔ Persistent Check Engine Light (CEL) illumination
- ✔ Engine stalling, stumbling, or misfiring
- ✔ Noticeable decrease in fuel economy
- ✔ Harsh, delayed, or incorrect transmission shifting
- ✔ Complete no-start or intermittent starting issues
- ✔ Failure to communicate with diagnostic scan tools
- ✔ Inaccurate or erratic gauge readings
A Hassle-Free, VIN-Programmed Solution
Don’t waste time and money on a trip to the dealership. Our process is designed for convenience and accuracy. When you purchase this Savana 3500 PCM, simply provide us with your vehicle’s VIN. Our technicians will then program the module with the correct, updated software for your exact make, model, and year. The module arrives at your door ready for installation. In most cases, the only additional step required is a simple security relearn procedure, which you can perform yourself in your driveway without any special tools. This ensures your vehicle’s anti-theft system properly recognizes the new module. This part is a direct replacement for part numbers 12589462, 12602801, and 89017749 and fits a wide array of GM trucks and vans from 2005 to 2007. Please verify the extensive fitment list to confirm compatibility with your specific vehicle.
Frequently Asked Questions
Why do you need my VIN?
Your Vehicle Identification Number (VIN) is essential for us to load the exact GM-specified software for your vehicle’s engine, transmission, and options. This ensures perfect compatibility and performance, and allows the module to communicate correctly with all other systems in your vehicle.
Is this part difficult to install?
The physical installation is typically straightforward. The PCM is usually located in the engine bay and is held in place by a few bolts and has several large electrical connectors. Basic hand tools are all that’s required for the physical swap.
Will I need to do anything after installing this PCM?
After installation, you will likely need to perform a security relearn procedure (sometimes called a CASE relearn or Passlock relearn). This syncs the new PCM with your vehicle’s anti-theft system. This procedure does not require special tools and instructions are readily available online or in service manuals.
How do I know if the PCM is really the problem?
While the symptoms listed are strong indicators, it’s always best to have a proper diagnosis performed. This includes checking for specific diagnostic trouble codes (DTCs), verifying power and ground at the PCM connector, and ensuring other components like sensors and wiring are functioning correctly.
Is this a new or used part?
This is a high-quality, inspected, and tested used OEM component. Each module is verified to be fully functional before being programmed with your vehicle’s specific software, offering OEM performance and reliability.