Is Your GM Truck or Van Running Rough?
If you’re dealing with a persistent check engine light, erratic shifting, stalling, or a no-start condition in your Chevrolet Express or other compatible GM vehicle, a failing Powertrain Control Module (PCM) is often the culprit. As the central computer for your engine and transmission, its health is critical. Over my 20+ years in the shop, I’ve seen countless work vans and trucks pushed to their limits, and the constant heat and vibration in the engine bay eventually take their toll on the original PCM’s sensitive electronics.
This isn’t just a replacement part; it’s a complete, ready-to-install solution. We take the guesswork and high dealership costs out of the equation by programming this module specifically for your vehicle using your VIN. This ensures all factory settings and the latest GM software updates are loaded before it even ships. You get a part that’s designed to restore your vehicle’s original performance and reliability.
What Makes This PCM the Right Choice?
- ✔ VIN Programmed & Ready to Install: Simply provide your vehicle’s VIN at checkout, and we’ll handle the complex programming. This module arrives ready for a straightforward installation.
- ✔ Eliminate Dealer Hassles: Skip the expensive trip to the dealership for programming. This part allows you to complete the entire job in your own garage or at your trusted local mechanic.
- ✔ Fix Common Drivability Problems: A faulty PCM can cause a host of frustrating issues. This module is the definitive solution for problems like:
- Intermittent or constant Check Engine Light (CEL)
- Poor fuel economy
- Harsh or incorrect transmission shifting
- Engine stalling, stumbling, or misfiring
- Communication errors with scan tools
- Vehicle failing emissions tests
- ✔ Broad Compatibility: This module serves as a direct replacement for part numbers 12602801, 12589462, and 89017749, fitting a wide range of GM trucks, vans, and SUVs from 2005-2007.
Real-World Diagnosis: The Case of the Stalling Work Van
“A customer’s 2006 Express 2500 came in last week with these exact symptoms. The van would run fine when cold, but after about 20 minutes of city driving, it would start to shift hard between 1st and 2nd gear and occasionally stall at red lights. The driver had already replaced the throttle position sensor and a speed sensor with no luck. After hooking up my professional scan tool, I noticed the PCM was intermittently losing communication. This is a classic sign of internal board failure, often caused by heat-related stress on the solder joints. We installed one of our pre-programmed PCMs, and the van was back on the road making money for his business the same afternoon. This is a fix I’ve performed hundreds of times on these reliable but hard-working GM vehicles.”
Easy Installation for Your 2005-2007 Express 2500 PCM
Installing your new PCM is a manageable job for a confident DIYer. For the Express and Savana vans, the module is typically located in the left rear of the engine compartment.
- Safety First: Disconnect the negative terminal from your vehicle’s battery and wait at least 15 minutes to allow all system capacitors to discharge.
- Locate the PCM: Find the existing module in the engine bay. It will have several large multi-pin electrical connectors attached.
- Disconnect and Remove: Carefully unplug all electrical connectors. They have locking tabs that need to be released. Once disconnected, unbolt the module from its mounting bracket.
- Install the New Module: Bolt the new, pre-programmed PCM into place. Reconnect all electrical connectors, ensuring they click securely into place.
- Reconnect Battery: Reattach the negative battery terminal.
- Final Step: In some cases, a security relearn procedure may be necessary, which can typically be done by cycling the key. Your vehicle is now ready to start.
Expert Pro Tip From a 20-Year Technician
Before you plug in your new PCM, take a moment to inspect the harness connectors. Use a small brush and some quality electrical contact cleaner to remove any dust, oil, or signs of green corrosion from the pins. A poor connection is one of the most common reasons for a new module to fail or throw false codes. This simple five-minute step ensures a perfect connection and protects your investment.
Don’t let a faulty computer keep your vehicle sidelined. Order this VIN-programmed PCM today and restore the performance and dependability you rely on.