Restore Peak Performance to Your 2004 GM Vehicle
Is your 2004 GM truck, van, or car suffering from frustrating issues like a persistent check engine light, poor fuel economy, erratic shifting, or a no-start condition? These are classic signs of a failing Powertrain Control Module (PCM), the electronic brain of your vehicle. Don’t let a faulty computer keep you off the road. This direct-replacement PCM is the reliable, professional solution to get your vehicle running smoothly and efficiently again.
Common Symptoms & Your Solution
A failing PCM can cause a wide range of confusing problems that are often misdiagnosed. If you’re experiencing any of the following, this module is your definitive fix:
- Check Engine Light: Specifically for internal module failure codes like P0601, P0602, P0606, or other communication errors.
- Engine Performance Issues: Stalling, hesitation, rough idling, misfires, or a noticeable loss of power.
- Transmission Problems: Harsh or delayed shifting, or failure to shift into certain gears.
- No-Start Condition: The engine cranks but won’t start, often due to a lack of fuel injector or ignition coil command from the PCM.
- Communication Failures: Your scan tool cannot communicate with the engine computer.
By installing our expertly prepared Programmed 12586243 PCM, you’re not just replacing a part; you’re restoring your vehicle’s core operational integrity with the latest software and a precise configuration for your specific vehicle.
Features & Benefits
- ✔ VIN-Specific Programming: We flash this module with the latest GM-certified software using your vehicle’s unique VIN. This ensures perfect compatibility with your engine, transmission, and factory options right out of the box.
- ✔ Plug-and-Play Design: Our pre-programming service makes installation straightforward. In most cases, you can simply install the module and perform a security relearn procedure, getting you back on the road faster.
- ✔ Restored Drivability: Get back the smooth acceleration, crisp shifting, and consistent performance you expect from your vehicle.
- ✔ Wide Model Compatibility: This single unit, also known as part number 89017739, is the correct computer for a vast range of 2004 GM vehicles, from the work-ready Silverado and Express Van to the performance-oriented Corvette and GTO.
- ✔ Peace of Mind: This unit is backed by our one-year replacement warranty.
Expert Insight: Why VIN Programming is Non-Negotiable
From over 20 years of hands-on diagnostics, I can tell you that installing a generic, un-programmed module is a recipe for disaster. Modern vehicles use complex anti-theft systems (like GM’s Passlock/VATS) that are tied directly to the PCM and the VIN. Without proper programming, your vehicle simply will not start. Furthermore, subtle differences in axle ratios, tire sizes, and emissions equipment are all coded in the software. Our VIN-matching service isn’t just a convenience; it’s a critical step that prevents hours of frustration, additional diagnostic costs, and potential damage to other components. We ensure the Programmed 12586243 PCM you receive is the exact digital twin of your original, only better—with all the latest factory updates included.
Frequently Asked Questions
How do I provide my VIN number?
After you complete your purchase, you will need to send us your 17-digit Vehicle Identification Number (VIN). We cannot ship your part until we receive this information, as the programming is specific to your vehicle.
Will I need to do anything after installing this PCM?
In most cases, you will need to perform a security relearn procedure, which can typically be done without special tools and takes about 30 minutes. Instructions are readily available online for most GM models. Some vehicles may also require a Crankshaft Variation Relearn (CASE relearn), which requires a capable scan tool.
Is this the correct part for my vehicle?
This module fits a wide variety of 2004 GM models. Please carefully review the compatibility list on this page. If your vehicle is listed and your original part number is 12586243 or 89017739, this is the correct replacement. Providing your VIN ensures we program it perfectly for your specific configuration.
What if my original part number is different?
This module replaces multiple part numbers. The most common are 12586243 and 89017739. If your part number is not listed, please contact us with your VIN before ordering to ensure we can provide the correct computer for your vehicle.
What does “plug-and-play” mean in this context?
It means the module arrives with all the necessary software for your vehicle’s engine and transmission already loaded. It eliminates the need for expensive dealership programming. You simply install it, perform the security relearn, and you’re ready to go.
Order your Programmed 12586243 PCM today and restore the reliability and performance your GM vehicle was built for.