Get Your Van Back in Service, Fast.
When your 2004 GMC Savana 3500 is down, your business is down. A faulty Powertrain Control Module (PCM) can bring your operations to a halt, causing frustrating issues like a no-start condition, poor fuel economy, erratic shifting, or a persistent Check Engine Light. This isn’t just an inconvenience; it’s costing you time and money. This replacement PCM is the definitive, no-hassle solution to get your reliable workhorse back on the road and earning for you again.
Each unit is meticulously programmed to your vehicle’s specific Vehicle Identification Number (VIN). This critical step ensures that the computer communicates perfectly with your van’s engine, transmission, and security systems right out of the box. We load the latest, most stable software updates from GM, which can often resolve underlying issues the original factory programming had. This is the smart, efficient way to solve complex electronic problems without an expensive trip to the dealership.
Common Symptoms & Your Direct-Fit Solution
If your Savana is experiencing any of the following, a failing PCM is the likely culprit:
- Check Engine Light: Especially with communication-related Diagnostic Trouble Codes (DTCs) like P0601, P0602, or P0606.
- No-Start or Hard-Start: The engine cranks but refuses to start, or starts only after extended cranking.
- Poor Performance: Noticeable loss of power, hesitation during acceleration, or a significant drop in fuel mileage.
- Erratic Shifting: The transmission may shift harshly, at the wrong times, or not at all.
- Stalling: The engine may stall unexpectedly while driving or at idle.
Installing this professionally programmed 2004 GMC Savana 3500 PCM is the most reliable way to permanently resolve these issues and restore your van’s original performance and dependability.
Features & Benefits
- ✔ VIN-Specific Programming: Arrives ready for installation with no need for an expensive dealership visit for programming.
- ✔ Plug-and-Play Installation: Simply disconnect the old module and connect the new one to get back up and running. (A security relearn procedure may be required, which is simple and takes about 30 minutes).
- ✔ Latest GM Software: Flashed with the most current vehicle software to optimize performance, emissions, and fuel efficiency.
- ✔ Direct-Fit Replacement: Guaranteed compatibility with part numbers 12586243 and 89017739.
- ✔ Peace of Mind: This unit is backed by our one-year replacement warranty.
An Expert’s Note on PCM Replacement
As a technician with over two decades of experience, I’ve seen countless vehicle owners try to save a few dollars by pulling a computer from a salvage yard. More often than not, it creates a bigger headache. These GM vehicles use a sophisticated anti-theft system (VATS/Passlock) that is tied to the original vehicle’s VIN. A used, non-programmed module will almost always result in a no-start condition that leaves you stranded. Investing in a properly programmed 2004 GMC Savana 3500 PCM from the start is the only way to guarantee compatibility and avoid immobilizing your vehicle. It’s the difference between a quick repair and a costly, time-consuming ordeal.
Frequently Asked Questions
Is any additional programming required after installation?
No. This PCM comes fully programmed to your VIN. However, you will likely need to perform a simple Security Relearn Procedure, also known as a VATS relearn. This process syncs the new PCM to your vehicle’s anti-theft system and does not require any special tools. It typically involves turning the key on and off in a specific sequence for about 30 minutes.
How do I provide my VIN?
After you complete your purchase, you will need to send us your 17-digit Vehicle Identification Number (VIN). We cannot program and ship your module without it. You can typically find your VIN on your vehicle’s registration, insurance card, or on a placard on the driver’s side dashboard visible through the windshield.
Where is the PCM located on my 2004 Savana 3500?
On the 2004 GMC Savana 3500 van, the Powertrain Control Module (PCM) is typically located in the engine compartment, on the driver’s side, often near the master cylinder or firewall.
What is the difference between a PCM and an ECM?
The terms are often used interchangeably. ECM stands for Engine Control Module, while PCM stands for Powertrain Control Module. A PCM is a more advanced controller that manages both the engine and the transmission functions, which is what this GM vehicle uses. This programmed 2004 GMC Savana 3500 PCM controls all essential powertrain functions.
Will this fix my Check Engine Light?
If the Check Engine Light is caused by an internal failure of the PCM itself (indicated by codes like P0601, P0606, etc.), then yes, this part will resolve the issue. It is always recommended to have the codes read by a professional or with a code scanner to ensure the PCM is the root cause of the problem before ordering.