Is Your Vehicle Running Rough, Stalling, or Throwing Confusing Codes?
A failing Powertrain Control Module (PCM) can be the hidden cause behind some of the most frustrating vehicle issues. If you’re dealing with a persistent check engine light, unexplained stalling, poor fuel economy, or harsh shifting, the brain of your engine might be the culprit. Don’t let a faulty computer keep you off the road. This professionally programmed engine computer is the straightforward, reliable solution to restore your vehicle’s performance and get you driving with confidence again.
Common Symptoms & Your Solution
A failing PCM can manifest in numerous ways, often mimicking other sensor or component failures. This module is the definitive fix for issues related to internal computer failure, including:
- Check Engine Light with communication-related Diagnostic Trouble Codes (DTCs) like P0601, P0602, P0606.
- Intermittent or complete no-start conditions where the engine cranks but won’t fire.
- Erratic transmission shifting, getting stuck in gear, or delayed engagement.
- Reduced engine power and a noticeable drop in fuel efficiency.
- Communication loss with diagnostic scan tools.
This 2004 GM PCM 89017739 Programmed module is meticulously prepared to be the heart of your vehicle’s engine management system, ensuring all components work in perfect harmony as the factory intended.
Features & Benefits
- ✔ VIN-Specific Programming: We flash the module with the latest GM software updates using your vehicle’s VIN. This ensures perfect compatibility with your engine, transmission, and options, eliminating conflicts.
- ✔ Plug-and-Play Installation: Because it arrives pre-programmed, installation is simplified. In most cases, you can install it without needing a trip to the dealership for expensive programming.
- ✔ Restored Performance & Efficiency: A correctly functioning PCM ensures precise fuel delivery, ignition timing, and transmission control, bringing back the smooth performance and fuel economy you expect.
- ✔ Broad GM Compatibility: This versatile module fits a wide range of 2004 GM trucks, vans, SUVs, and performance cars, making it a reliable choice for dozens of models.
- ✔ Peace of Mind: This unit is backed by our one-year replacement warranty.
Expert Insight: The Critical Role of VIN Programming
As a technician with over two decades of experience, I’ve seen countless issues arise from improperly matched control modules. Simply installing a used computer from another vehicle won’t work. Modern vehicles use the VIN to sync the engine computer with the anti-theft system, instrument cluster, and body control module. Our process of programming your specific VIN to this 2004 GM PCM 89017739 Programmed module isn’t just a convenience—it’s a critical step that prevents security lockouts and ensures every system in your vehicle communicates correctly from the moment you turn the key. We handle this complex step for you, so your repair is as simple as possible.
Frequently Asked Questions
How do I provide my Vehicle Identification Number (VIN)?
After completing your purchase, you will need to send us your 17-digit VIN. You can typically add it as a note during checkout or reply to your order confirmation email. We cannot ship your part until we receive your VIN, as the programming is specific to your vehicle.
Will I need to do any additional programming after installation?
In most cases, no. This module is sent ready for installation. However, some vehicles may require a security relearn procedure (often called a CASE relearn or anti-theft relearn), which can typically be done without special tools. Instructions for this simple procedure are widely available online for your specific model.
Is this a new or used part?
This is a high-quality, inspected, and tested original equipment part that has been professionally prepared for service. Each unit is verified to be fully functional before being programmed and shipped.
What if my original part number is 12586243?
This module is a direct replacement for several part numbers, including 12586243 and 89017739. As long as your vehicle is on the compatibility list, this unit will function correctly once programmed to your VIN.
Where is the PCM located on my vehicle?
The location varies by model. On many 2004 GM trucks and SUVs (Silverado, Sierra, Suburban), it’s under the hood on the driver’s side, near the battery. On vans (Express, Savana), it’s often in the rear of the engine compartment. For cars like the Corvette or GTO, it’s typically on the passenger side of the engine bay. Always disconnect the battery before removal or installation.