Is Your Truck Running Rough? It Could Be The ECM.
If your 2007-2009 Chevrolet Silverado 1500 is experiencing perplexing issues like random stalling, poor fuel economy, a persistent check engine light, or a complete no-start condition, the root cause is often a failing Engine Control Module (ECM). As the central computer of your vehicle, the ECM manages everything from fuel injection and ignition timing to transmission shifting. When it begins to fail, it can create a cascade of problems that are difficult to diagnose and can leave you stranded. Don’t let a faulty computer dictate your truck’s reliability. This direct-replacement ECM, service number 12629020, is the definitive solution to restore your vehicle’s performance and peace of mind.
From the Diagnostic Bay
We had a 2008 Sierra 1500 with the 4.3L V6 come in on a tow truck. The owner had replaced the battery, alternator, and even the fuel pump, but it would still crank without starting. The scanner was giving us intermittent communication errors with the powertrain module. After checking all the wiring and grounds, we suspected the ECM itself. We swapped in one of our pre-programmed modules, performed the security relearn, and the truck fired up on the first try. It’s a classic case where the core component, the ECM, was the hidden culprit behind a mountain of frustrating symptoms.
Common Symptoms of a Failing ECM
- ✔ Check Engine Light is on or flashes intermittently.
- ✔ Engine stalling, stuttering, or misfiring for no apparent reason.
- ✔ Noticeable decrease in fuel efficiency.
- ✔ Difficulty starting the engine or a no-crank, no-start situation.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Communication errors with diagnostic scan tools.
- ✔ Loss of power and sluggish acceleration.
Your Plug-and-Play Solution for the 2007-2009 Silverado 1500 ECM
Replacing an ECM isn’t just about swapping hardware; it’s about ensuring the software is a perfect match for your truck. This module is not a generic, one-size-fits-all part. We take the guesswork out of the repair by programming the unit specifically for your vehicle using the VIN you provide at checkout. This ensures that all factory settings, engine parameters, and anti-theft protocols are correctly configured. This unit is a direct replacement for multiple service numbers, including 12597125, 12612397, 12594750, and more, making it a versatile and reliable choice for a wide range of GM vehicles.
While this is a perfect fit for the 2007-2009 Silverado 1500 ECM with the 4.3L engine, its compatibility extends to many other models like the Chevrolet Malibu, Cobalt, HHR, GMC Sierra, Pontiac G6, and Saturn Aura. Please verify your original part number and check the detailed fitment list to ensure this is the correct component for your specific make, model, and engine combination.
Frequently Asked Questions
Do I need to do any programming after I receive this ECM?
No. We flash the module with the latest GM software updates using your vehicle’s VIN before shipping. In most cases, you will only need to perform a simple security relearn procedure (often called a key relearn or anti-theft relearn), which can typically be done without any special tools. Instructions are widely available online for this process.
How do I provide my VIN number?
After you complete your purchase, you will receive instructions on how to send us your vehicle’s 17-digit VIN. We cannot ship your part until we have this information, as the programming is essential for the part to function in your vehicle.
Is this compatible with other part numbers?
Yes. This ECM is a direct replacement for a range of service numbers, including 12597125, 12612397, 12594750, 12629019, 12635902, and 12611549. If your original module has one of these numbers, this part will work for you.
Where is the ECM located on my 2008 Silverado 1500?
On the 2007-2009 Silverado and Sierra 1500 with the 4.3L V6 engine, the ECM is typically located in the engine bay on the driver’s side, underneath the battery tray. Always disconnect the battery before attempting to remove or install the module.
What if my vehicle isn’t a Silverado?
This ECM fits a wide variety of GM vehicles from 2007 to 2012, including the Malibu, Cobalt, HHR, G5, G6, Aura, Vue, and more. Please refer to the detailed fitment list on this page to confirm it matches your specific year, make, model, and engine.