Is Your GM Truck or Van Experiencing Critical Engine Problems?
If your 2009-2010 Silverado 3500, Sierra, Express Van, or another compatible GM vehicle is suddenly refusing to start, running erratically, or displaying a frustrating array of warning lights, a failing Engine Control Module (ECM) is a very likely culprit. As the central computer for your engine, its failure can bring your entire vehicle to a standstill, causing symptoms like harsh shifting, terrible fuel economy, and persistent communication error codes that leave you stranded.
The Plug-and-Play Solution: Programmed & Ready for Installation
Forget expensive dealership visits and the hassle of coordinating programming. This ECM, part number 12625455 (also compatible with 12629009), arrives at your door completely programmed to your vehicle’s specific VIN. We load the latest, most stable GM-approved software, ensuring all factory parameters for your engine and transmission are perfectly calibrated. This isn’t just a replacement part; it’s a restoration of your vehicle’s core operational logic.
Expert Pro Tip from a 20-Year Veteran Technician
Before you install a new ECM, take 10 minutes to inspect the wiring harnesses for the ignition coils and fuel injectors. In my shop, I’ve seen countless ECMs fail due to an external short. A customer’s 2010 Silverado 2500 with the 6.0L came in with a no-start after a new ECM was installed elsewhere. We found a chafed ignition coil wire on cylinder 3 that was shorting to the block, which had fried both the original and the replacement module. A simple visual check can prevent a costly repeat failure.
Key Features & Benefits
- ✔ VIN-Specific Programming: We flash the module with the latest GM software using your VIN, ensuring 100% compatibility and optimal performance.
- ✔ No Additional Programming Needed: This module is ready for installation right out of the box, saving you hundreds in dealer fees.
- ✔ Resolves Common Failure Symptoms: Effectively corrects issues like no-start conditions, random stalling, check engine lights (CEL), and poor engine performance.
- ✔ Broad GM Compatibility: While perfect for the Silverado, this ECM fits a wide range of GM trucks, vans, and SUVs from 2009-2010. See the full fitment list to confirm.
- ✔ Direct Replacement: Matches OEM part numbers 12625455 and 12629009 for a perfect fit and function.
Easy Installation Guide for Your 2009-2010 Silverado 3500 Engine Computer
Installing your new ECM is a straightforward process that you can do at home with basic tools. For most trucks like the Silverado/Sierra, the ECM is located in the front left (driver’s side) of the engine compartment.
- Safety First: Disconnect the negative terminal from your vehicle’s battery.
- Locate the ECM: Find the module in the engine bay. It will have several large electrical connectors attached.
- Disconnect Wiring: Carefully release the locking tabs and unplug all electrical connectors from the old ECM. Inspect the pins for any corrosion or damage.
- Remove the Old Module: Unbolt the old ECM from its mounting bracket and remove it from the vehicle.
- Install the New ECM: Mount your new, pre-programmed ECM in the same location.
- Reconnect Everything: Securely plug in all electrical connectors and reconnect the negative battery terminal.
- Perform Security Relearn: In many cases, you will need to perform a simple security relearn procedure (often called a “key-on/key-off” cycle) to sync the new ECM with your vehicle’s anti-theft system. This procedure is easily found online for your specific model and does not require special tools.
By providing your VIN at checkout, you ensure we can deliver a fully functional, correctly calibrated engine computer that will restore your vehicle’s reliability and performance. Get your truck back to work without the dealership headache.