Restore Your Van’s Reliability and Performance
Is your GMC Savana or Chevrolet Express van giving you headaches? Unexplained stalling, a persistent Check Engine Light, or rough running conditions can often point to a failing Powertrain Control Module (PCM). As the electronic brain of your vehicle, a faulty PCM can disrupt everything from fuel delivery to transmission shifting, making your work van unreliable. I’ve seen it countless times in my shop: a great workhorse of a van sidelined by a frustrating electronic issue. This isn’t just an inconvenience; it’s lost time and money.
This is your direct-fit, reliable solution. We offer a Powertrain Control Module for your 2005-2007 Savana 2500 PCM and other compatible GM vehicles, meticulously programmed to your specific Vehicle Identification Number (VIN). This means it arrives at your door with the latest GM software updates already installed, eliminating the need for an expensive trip to the dealership. It’s designed to restore the precise engine and transmission management your vehicle had when it was new.
A Technician’s Notebook: The Intermittent No-Start
A local delivery company brought in their ’06 Express 2500. The driver reported it would randomly fail to start, but only after it had been running for a while. We couldn’t replicate the issue in the bay, and there were no hard codes stored, just some history communication faults. After checking grounds and power feeds to the PCM, we suspected the module itself was failing internally when it got hot. We installed one of these VIN-programmed PCMs. The swap took less than 30 minutes. The company reported back a month later that the van hadn’t missed a single start since. It’s often these heat-related, intermittent failures that make a pre-programmed 2005-2007 Savana 2500 PCM the most efficient repair.
Is Your Van Showing These Symptoms?
A failing PCM can manifest in various ways. If you’re experiencing any of the following, it’s a strong indicator that your module needs attention. I’ve diagnosed hundreds of these based on these exact complaints:
- ✔ Check Engine Light is illuminated with codes like P0601 (Internal Control Module Memory Check Sum Error) or P0606 (PCM Processor Fault).
- ✔ The engine cranks but refuses to start.
- ✔ Unexplained stalling, especially when coming to a stop or at idle.
- ✔ Noticeable decrease in fuel economy.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ The engine runs rough, misfires, or seems to lack power.
- ✔ Communication errors with diagnostic scan tools.
A Straightforward Guide to Installation
Replacing the PCM on these vans is a job most DIYers or any professional technician can handle with basic tools. Our pre-programming service makes it even simpler. While specific steps can vary slightly by model, here is a general guide:
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait at least 15 minutes to allow capacitors to discharge.
- Locate the Module: On most Savana and Express vans, the PCM is located in the engine compartment, on the driver’s side, often near the master cylinder. On trucks, it’s typically under the battery tray.
- Disconnect Connectors: Carefully release the locking tabs and unplug the wiring harness connectors from the old PCM. Inspect the connectors for any corrosion or damage.
- Remove the Old PCM: Unbolt the module from its mounting bracket. It’s usually held in by a few small bolts.
- Install the New PCM: Mount your new, pre-programmed module in place and secure it with the original bolts.
- Reconnect Everything: Firmly plug the wiring harnesses back into the new PCM until they click into place. Reconnect the negative battery terminal.
- Perform Security Relearn: You will likely need to perform a security relearn procedure (often called a CASE learn or Passlock relearn) to sync the new PCM with your vehicle’s anti-theft system. This can typically be done without special tools by cycling the ignition key. Consult your vehicle’s service information for the exact procedure.
Will This Module Fit My GM Vehicle?
This PCM is a direct replacement for part numbers 12589462, 12602801, and 89017749. It is guaranteed to fit the following vehicles. Please verify your model and year to ensure compatibility.
ASTRO/SAFARI (2005), AVALANCHE 2500 (2005-2006), BLAZER S10/JIMMY S15 (2005), CTS (2004-2005), EXPRESS/SAVANA VANS (1500, 2500, 3500, 2005-2007), SILVERADO/SIERRA PICKUPS (1500, 2500, 3500, 2005-2007 including ‘Classic’ models), SUBURBAN 2500 (2005-2006), YUKON XL 2500 (2005-2006). Note: Specific engine options apply, such as the 4.3L V6 and 8.1L V8. Always confirm with your VIN.
Why do you need my VIN?
Your VIN (Vehicle Identification Number) is essential for us to program the module with the correct software for your van’s specific engine, transmission, and options. This ensures perfect compatibility and function right out of the box.
Is any additional programming required after installation?
No dealership programming is needed because we flash it before shipping. However, you will need to perform a security relearn procedure (CASE/Passlock) so the module can communicate with your vehicle’s anti-theft system. This procedure is simple and can be done in your driveway.
What happens if I don’t do the security relearn?
If the security relearn is not performed, your vehicle will likely not start. It’s a critical step to sync the new ‘brain’ with the rest of your vehicle’s security components.
Is this a used part?
This is a high-quality, tested component that has been verified to meet or exceed original equipment specifications. It is loaded with fresh, vehicle-specific GM software to ensure reliability.
Where is the PCM located on my 2007 Savana 2500?
On the 2007 Savana 2500, the PCM is located in the left rear of the engine compartment. It’s a silver box with multiple large electrical connectors.
Will this fix my transmission shifting problems?
In many cases, yes. The PCM controls transmission line pressure and shift points. If the module is failing, it can cause hard shifts, delayed shifting, or hunting for gears. A new, correctly programmed 2005-2007 Savana 2500 PCM can resolve these issues if the module is the root cause.