Restore Peak Performance to Your 2004 GMC Savana 3500
Is your workhorse van running rough, shifting erratically, or refusing to start? The Powertrain Control Module (PCM), often called the Engine Control Module (ECM), is the central computer responsible for managing your engine’s performance, fuel economy, and emissions. When it begins to fail, it can cause a cascade of frustrating and difficult-to-diagnose issues. This replacement PCM, part number 89017739, is the definitive solution to get your Savana or other compatible GM vehicle back on the road and running reliably.
Unlike generic modules that require expensive trips to the dealership for programming, this unit is delivered to you fully programmed for your specific vehicle. We use your Vehicle Identification Number (VIN) to flash the module with the latest, most stable software updates directly from GM. This ensures perfect compatibility and function right out of the box, simplifying the repair process and saving you significant time and money.
Common Symptoms of a Failing PCM
If you’re experiencing any of the following issues, a faulty PCM could be the culprit. A failing module can often mimic other sensor or component failures, making diagnosis tricky. Look out for these tell-tale signs:
- ✔ Check Engine Light: The light is on, and you may have codes related to module communication, sensor circuits, or processor faults.
- ✔ Poor Engine Performance: Noticeable loss of power, hesitation during acceleration, or rough idling.
- ✔ Reduced Fuel Economy: The engine isn’t running efficiently, leading to more frequent stops at the gas station.
- ✔ Intermittent Stalling: Your vehicle may stall unexpectedly while driving or at a stop.
- ✔ 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.
- ✔ Harsh or Incorrect Shifting: The PCM also controls transmission functions, and a fault can lead to erratic shifting or getting stuck in one gear.
- ✔ Communication Issues: A scan tool may be unable to communicate with the PCM, indicating a critical internal failure.
The Superior Solution: A Programmed 2004 Savana 3500 PCM
Choosing a pre-programmed module is the smartest way to handle this critical repair. Our process is designed for both professional technicians and savvy DIYers. When you order, you simply provide us with your vehicle’s VIN. Our technicians then access the official GM database to load the correct software and calibration files for your exact model, engine, transmission, and options. This critical step ensures that all systems communicate and operate as the manufacturer intended. This isn’t a one-size-fits-all solution; it’s a tailored repair for your specific vehicle.
Wide-Ranging GM Compatibility
While this is a perfect fit for the 2004 Savana, this versatile PCM (interchangeable with part number 12586243) was used across a wide array of GM trucks, vans, and SUVs from that model year. Please verify your part number and consult the compatibility list below to ensure a perfect match for your vehicle.
This module is a direct replacement for the following vehicles:
- 2004 Avalanche 2500
- 2004 Express & Savana Vans (1500, 2500, 3500)
- 2004 Sierra & Silverado Pickups (1500, 2500, 3500 with specific engines)
- 2004 S10/S15/Sonoma & Blazer/Jimmy
- 2004 Astro & Safari Vans
- 2004 Trailblazer EXT, Envoy XL, Envoy XUV, Rainier
- 2004 Corvette, GTO, SSR
- 2004-2005 CTS-V
- 2004 Suburban 2500 & Yukon XL 2500
Note: For some models, specific engine sizes or option codes (IDs) are required for compatibility. Please check the original description’s fitment data carefully.
Frequently Asked Questions
How do I provide my VIN?
After you complete your purchase, you can send us your 17-digit VIN through the messaging system or add it as a note during checkout. We cannot ship your part until we receive the VIN, as the programming is essential.
Is any additional programming required after installation?
In most cases, this module is plug-and-play. However, some vehicles may require a security relearn procedure (also known as a CASE relearn or anti-theft relearn). This is a simple procedure that can typically be done without special tools and instructions can be readily found online for your specific model.
What if my original part number is 12586243?
This module, 89017739, is a fully compatible and interchangeable service replacement for part number 12586243. It will function identically once programmed to your vehicle’s VIN.
Where is the PCM located on my 2004 Savana 3500?
On the 2004 Savana and Express vans, the PCM is typically located in the engine compartment on the driver’s side, towards the rear of the engine bay. Always disconnect the battery before attempting to remove or install the module.
Do you need my old PCM back?
This purchase does not require a core return. You can keep your old module.