Is Your GM Truck or SUV Running Rough? Get a Reliable Fix.
If you’re staring at a persistent check engine light, dealing with erratic engine performance, poor fuel economy, or even a frustrating no-start condition, a failing Engine Control Module (ECM) is often the culprit. As the brain of your vehicle’s engine, the ECM controls everything from fuel mixture and ignition timing to transmission shifts. When it falters, the symptoms can be widespread and confusing. This isn’t just an inconvenience; it’s a critical failure that compromises your vehicle’s reliability and performance.
The Direct Solution: Programmed & Ready to Install
Forget expensive dealership visits and the hassle of finding a local shop with the right programming equipment. This Engine Control Module, part number 12629009 (also compatible with 12625455), arrives at your door completely programmed to your vehicle’s specific Vehicle Identification Number (VIN). We handle the complex part, so you can get back on the road faster.
- ✔ VIN-Specific Programming: We flash the module with the latest GM-certified software for your exact vehicle. This ensures perfect communication with all other onboard systems.
- ✔ Resolves Common Failures: Directly addresses issues like random misfires, communication error codes (U-codes), harsh shifting, and complete engine shutdown.
- ✔ Broad GM Compatibility: This versatile module is the correct fit for a wide range of popular 2009-2010 GM vehicles, including the Escalade, Silverado, Sierra, Tahoe, Yukon, and more. Please verify your part number and check the fitment list below.
- ✔ No Additional Programming Needed: Once installed, your vehicle will start and run correctly without needing a trip to the dealer for software setup.
From the Shop Floor: A Real-World Diagnostic Story
“A customer’s 2010 Silverado 2500 came in last month with a persistent misfire on cylinder 3 that nobody could solve. He’d already replaced the plug, wire, and coil pack twice. The injector was testing fine. After connecting my scan tool and monitoring live data, I noticed the injector pulse width for cylinder 3 was erratic, sometimes dropping out completely under load. This pointed directly to a failing driver inside the ECM. We installed one of these VIN-programmed modules, and the truck has run perfectly ever since. It’s a classic case where the problem isn’t the mechanical part, but the computer controlling it.”
Plug-and-Play Installation: No Dealer Visit Required
Installing your new ECM is a straightforward process that a confident DIYer can handle. While the exact location varies by model (e.g., LH front engine bay for a Sierra, inside the air cleaner box for an Impala), the general steps are consistent.
- Safety First: Disconnect the negative terminal from your vehicle’s battery and wait 10-15 minutes for the system capacitors to discharge.
- Locate the ECM: Find the existing module in your engine compartment. It will have several large wiring harness connectors.
- Disconnect and Remove: Carefully unplug the wiring harnesses. Most have a locking tab or lever that needs to be released. Then, unbolt the module from its mounting bracket.
- Install the New Module: Bolt the new ECM into place. Reconnect the wiring harnesses, making sure they click securely into position.
- Reconnect Battery: Re-attach the negative battery terminal. The vehicle is now ready to start. A security relearn procedure may be required, which typically involves cycling the key and is detailed in your owner’s manual.
Confirming Your 2009–2010 Escalade ESV Engine Computer Fitment
This module is the correct replacement for service part numbers 12629009 and 12625455. It is essential to verify the part number on your original module to ensure compatibility. This unit fits a vast array of GM models from trucks and SUVs to vans and sedans. After purchase, simply provide us with your VIN, and we’ll ensure the software is a perfect match for your vehicle’s options and powertrain. Restore the heart of your vehicle’s electronics and drive with confidence again.