Is your vehicle suffering from baffling electrical problems? Intermittent stalling, a persistent check engine light, or a complete no-start condition can often point to one culprit: a failing Engine Control Module (ECM). As a technician with over two decades of diagnostic experience, I’ve seen firsthand how a faulty ECM can mimic a dozen other issues, leading to wasted time and money on unnecessary parts. This is the central computer of your vehicle, and when it fails, it can bring everything to a halt.
This isn’t just a replacement part; it’s a complete, ready-to-install solution. We take the hassle and high cost of dealership programming out of the equation. When you purchase this 2009 Corvette Engine Computer, we flash it with the latest official GM software using your vehicle’s specific VIN. This ensures that all factory parameters for fuel, timing, and emissions are perfectly matched to your car, truck, or van. The result is a seamless installation that restores your vehicle’s original performance and reliability.
Case Study: A Tricky Diagnosis
I remember a 2009 Silverado 2500 that came into the shop with a random misfire and harsh shifting that no one could solve. The owner had already replaced plugs, coils, and even the transmission fluid. After hooking up my scanner, I saw no specific codes, just erratic data from the crank sensor. Instead of just replacing the sensor, I scoped the signal directly at the ECM pins. The signal going in was perfect, but the ECM’s response was delayed. A new, properly programmed ECM—this exact model—solved every single issue. It’s a reminder that the ECM is the brain, and a glitchy brain causes widespread problems.
Is Your Vehicle Showing These Symptoms?
A failing ECM can manifest in numerous ways. If you’re experiencing any of the following, this module is the likely solution:
- ✔ Check Engine Light is on with internal processor codes (like P0601, P0606).
- ✔ Engine cranks but refuses to start.
- ✔ Unexplained drops in fuel economy.
- ✔ The vehicle stalls intermittently for no apparent reason.
- ✔ Communication errors with diagnostic scan tools (e.g., U0100).
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Noticeable loss of engine power and performance.
A Straightforward Guide to Installation
Installing your new ECM is a job most DIYers can handle with basic tools. Following these steps will ensure a smooth process.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- Locate the ECM: On most compatible vehicles, the ECM is found in the engine bay, often on the driver’s side (LH) or passenger’s side (RH for Corvette). It will have several large electrical connectors attached.
- Disconnect the Old Unit: Carefully release the locking tabs on the electrical connectors and pull them straight out. Then, unbolt the old ECM from its mounting bracket.
- Install the New ECM: Bolt your new, pre-programmed ECM into place. Reconnect the electrical harnesses, ensuring they click securely into position.
- Reconnect Power: Reattach the negative battery terminal and tighten it.
- Final Step: Some vehicles may require a security relearn procedure, which typically involves cycling the key. Your vehicle’s service manual will have the specific, simple steps if needed.
Verified Vehicle Compatibility
This 2009 Corvette Engine Computer is a direct replacement for part numbers 12625455 and 12629009. It fits a wide range of General Motors vehicles. Please verify your model and options below to ensure guaranteed compatibility.
- AVALANCHE 1500: 2009, 2010 (ID 12625455)
- CORVETTE: 2009 (Base, RH engine compartment)
- ESCALADE / ESV / EXT: 2009, 2010 (6.2L, ID 12625455)
- EXPRESS / SAVANA VANS (1500/2500/3500): 2009 (4.8L, 5.3L, 6.0L)
- G6: 2009 (3.5L, 3.9L)
- G8: 2009 (ID 12625455)
- HUMMER H2: 2009
- IMPALA: 2009 (3.5L, 3.9L)
- MALIBU: 2009 (3.5L)
- SIERRA / SILVERADO (1500/2500/3500): 2009-2010 (Fitment varies by engine/option, including 6.0L VIN K)
- SUBURBAN / YUKON XL (1500/2500): 2009, 2010 (ID 12625455)
- TAHOE / YUKON: 2009, 2010 (w/o hybrid, ID 12625455)
- VUE: 2010 (3.5L)
Frequently Asked Questions
Do I need to do any programming myself?
No. This ECM arrives at your door pre-programmed with the latest GM software matched to your vehicle’s VIN. It is ready for installation right out of the box, saving you a trip to the dealership.
Where 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 ship the part until we have this information to perform the programming service.
Is this compatible with other part numbers?
Yes, this module is a direct replacement for part numbers 12625455 and 12629009. If your original module has one of these numbers, this part will work for you.
Will this fix my check engine light?
If the check engine light is caused by an internal failure of the ECM (common codes P0601-P0606), then yes, this part will resolve the issue. It’s crucial to properly diagnose the problem before ordering.
What tools are needed for installation?
Typically, you will only need basic hand tools, such as a socket set and ratchet, to remove the mounting bolts and disconnect the battery. No special diagnostic equipment is required for the installation itself.