Restore Your Vehicle’s Brain, Restore Your Peace of Mind
Is your 2004 GM vehicle suffering from baffling electrical issues, a persistent Check Engine Light, rough running, or even a complete no-start condition? The Powertrain Control Module (PCM) is the central computer of your vehicle, and when it fails, it can cause a cascade of frustrating and hard-to-diagnose problems. This genuine GM Engine Control Module is your direct-fit, dealership-free solution to get your truck, van, or SUV back on the road and running reliably. We take the guesswork and hassle out of the repair by pre-programming this Programmed 89017739 PCM specifically to your vehicle’s unique VIN before it ships.
Common Symptoms & Your Solution
A failing PCM can manifest in many ways, often mimicking other sensor or component failures. If you’re experiencing any of the following, a faulty module is a likely culprit:
- Check Engine Light: Particularly for internal module error codes like P0601, P0602, or P0606.
- Erratic Performance: Unexplained stalling, rough idling, hesitation during acceleration, or poor fuel economy.
- Transmission Issues: Harsh or incorrect shifting, as the PCM also controls transmission functions.
- 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.
- Failed Emissions Test: An improperly functioning module can’t manage the engine’s emissions systems correctly.
This module is the definitive solution, arriving at your door fully programmed with the latest GM software updates. It’s ready to install right out of the box, saving you from expensive diagnostic fees and programming charges at a dealership.
Features & Tangible Benefits
- ✔ VIN-Programmed for a Perfect Match: We flash the module to your specific VIN, ensuring it communicates perfectly with your vehicle’s security system, options, and other modules. No additional programming is required.
- ✔ Restores Peak Engine Performance: By correcting command signals, this PCM resolves issues like poor fuel economy, rough idle, and hesitation, bringing back the smooth, reliable operation you expect.
- ✔ True Plug & Play Installation: Simply disconnect the battery, swap the old module with your new pre-programmed one, and reconnect the battery. It’s a straightforward job for any DIYer or professional mechanic.
- ✔ Loaded with Updated GM Software: Your module will be loaded with the newest software from General Motors, ensuring all factory fixes and performance improvements are applied.
- ✔ Solves Communication & Error Codes: Directly addresses internal processor fault codes that can’t be fixed any other way, clearing that stubborn Check Engine Light for good.
- ✔ This unit is backed by our one-year replacement warranty.: Drive with confidence knowing your purchase is protected against defects.
Expert Insight: The Critical Role of VIN Programming
As a technician with over two decades of experience, I’ve seen countless vehicle owners buy a used computer online only to find it won’t start their car. Why? It comes down to the VIN. On these 2004 GM vehicles, the PCM is tied to the BCM (Body Control Module) and instrument cluster through a Vehicle Anti-Theft System (VATS/Passlock). A module with the wrong VIN programming will trigger the anti-theft system, disabling the fuel injectors and preventing the engine from starting. Our VIN-flashing service isn’t just a convenience—it’s the essential step that makes this a viable, plug-and-play repair. We ensure the digital handshake between all your vehicle’s modules is perfect from the moment you turn the key.
Frequently Asked Questions
Do I need to do any programming or flashing myself?
Absolutely not. The main benefit of our service is that this Programmed 89017739 PCM arrives at your door fully flashed to your vehicle’s VIN and loaded with the latest GM software. It is a true plug-and-play solution.
How and when do I provide my VIN?
You can enter your 17-digit Vehicle Identification Number (VIN) in the order notes section during checkout. If you forget, don’t worry! We will contact you via email after your purchase to request it. We cannot ship the module until we have programmed it.
Is this the correct part for my vehicle?
This module, part number 89017739, fits a very wide range of 2004 GM trucks, vans, and SUVs. Please review the compatibility list on this page. The most crucial step is providing us with your VIN, which allows us to confirm 100% compatibility and program the correct software for your specific model and options.
What’s the difference between a PCM, ECM, and ECU?
The terms are often used interchangeably. ECU (Engine Control Unit) is a general term. ECM (Engine Control Module) typically refers to a unit that only controls the engine. PCM (Powertrain Control Module) is the most accurate term for this part, as it controls both the engine and the automatic transmission functions.
Will this fix my Check Engine Light?
If your Check Engine Light is on due to an internal module failure (common codes include P0601, P0602, P0606), then this part is the correct fix. However, if the light is on for another reason, such as a faulty oxygen sensor or EGR valve, you will still need to repair that component. Always perform a proper diagnosis before ordering.