Is Your 2008 Silverado 3500 Running Rough?
If you’re experiencing frustrating issues like a persistent check engine light, poor fuel economy, engine stalling, or a no-start condition, a failing Engine Control Module (ECM) is a likely culprit. The ECM is the brain of your truck’s engine, controlling everything from fuel mixture and ignition timing to transmission shifting and emissions. When it fails, it can cause a wide range of problems that can leave you stranded. This isn’t just an inconvenience; it’s a critical component for the reliability and performance of your workhorse.
The Plug-and-Play Solution for Your Truck
Don’t let a faulty computer sideline your vehicle. We offer a direct replacement 2008 Silverado 3500 ECM, part number 12622141, that arrives at your door ready for installation. The biggest hurdle in replacing an ECM is the programming—it must be specifically calibrated to your truck’s unique Vehicle Identification Number (VIN) to communicate with all the other modules and systems. Our service eliminates this step for you. Simply provide us with your VIN during checkout, and our technicians will flash the module with the latest, most stable software updates directly from GM. This ensures optimal performance, fuel efficiency, and compatibility, saving you a costly trip to the dealership.
From the Diagnostic Bay
We had a 2008 Silverado 3500 with the 6.0L come in on a tow truck. The owner had already replaced the fuel pump and all the spark plugs chasing an intermittent stalling issue. The truck would run fine for 20 minutes, then die and refuse to restart for an hour. No consistent codes were being stored, just a generic U-code for lost communication every so often. After hours of checking wiring, we finally scoped the ECM’s power and ground feeds. We saw the 5-volt reference signal dropping out as the module heated up. A new, properly programmed ECM fixed it instantly. The owner was frustrated he’d spent so much on other parts first, which is a common story. A faulty ECM can mimic many other failures.
Common Symptoms of a Failing ECM
- ✔ Check Engine Light is illuminated with various, often inconsistent, trouble codes.
- ✔ Engine cranks but fails to start.
- ✔ Unexplained stalling or rough idling, especially when warm.
- ✔ Noticeable decrease in fuel economy.
- ✔ Hesitation or stumbling during acceleration.
- ✔ Automatic transmission shifting erratically or harshly.
- ✔ Communication errors with diagnostic scan tools.
Why Choose Our Pre-Programmed 2008 Silverado 3500 ECM?
This isn’t just a part; it’s a complete solution. By programming the module to your VIN, we ensure that it’s a true plug-and-play component. There is no need for additional, expensive programming with a dealership scan tool. This module is a direct replacement for part numbers 12622141, 12612384, and 12617568, ensuring broad compatibility. We handle the complex part so you can get back to what’s important: having a reliable truck that works as hard as you do.
Verified Vehicle Fitment
This Engine Control Module is a confirmed fit for a wide range of GM vehicles. Please verify your part number and vehicle options to ensure compatibility. This part fits the following vehicles:
- 2008 Chevrolet Silverado 3500 Pickup: Electronic Control Module; (LH front under battery), 6.0L
- 2008 Chevrolet Avalanche 1500: Electronic Control Module; (LH front under battery)
- 2008 Chevrolet Caprice: Electronic Control Module; ID 12612384
- 2008-2009 Chevrolet Equinox: Electronic Control Module; (LH engine compartment), 3.4L
- 2008 Chevrolet Express 1500/2500/3500 Van: Electronic Control Module; (LH rear engine compartment), gasoline engines
- 2008 Chevrolet Impala: Electronic Control Module; (lower part of air cleaner box), 3.5L or 3.9L
- 2008 Chevrolet Malibu: Both classic and new styles, 3.5L
- 2008 Chevrolet Silverado 1500/2500 Pickup: Electronic Control Module; (LH front under battery)
- 2008 Chevrolet Suburban 1500/2500: Electronic Control Module; (LH front under battery)
- 2008 Chevrolet Tahoe: Electronic Control Module; (LH front under battery), w/o hybrid
- 2008 GMC Sierra 1500/2500/3500 Pickup: Electronic Control Module; (LH front under battery)
- 2008 GMC Sierra Denali: Electronic Control Module; (LH front engine compartment)
- 2008 GMC Savana 1500/2500/3500 Van: Electronic Control Module; (LH rear engine compartment), gasoline engines
- 2008 GMC Yukon & Yukon XL 1500/2500: Electronic Control Module; (LH front under battery)
- 2008 Cadillac CTS: Electronic Control Module; (RH front engine compartment), 3.6L, VIN 7, ID 12612384
- 2008 Cadillac Escalade, ESV, EXT: Electronic Control Module; (LH front under battery)
- 2008 Hummer H2: Electronic Control Module; (LH front under battery)
- 2008-2009 Pontiac G6: Electronic Control Module; (LH front engine compartment), 3.5L or 3.9L
- 2008-2009 Pontiac Torrent: Electronic Control Module; (LH engine compartment), 3.4L
- 2008 Saturn Aura: Electronic Control Module; (RH firewall), 3.5L
- 2008-2009 Saturn Vue: Electronic Control Module; 3.5L
- 2008-2009 Chevrolet Corvette: Electronic Control Module; (RH engine compartment)
Frequently Asked Questions
Do I need to do any programming after I receive this ECM?
No. This module comes fully programmed to the VIN you provide at checkout. It is ready for installation right out of the box. In some cases, a security or crank-angle relearn procedure may be required, which can be done with a capable scan tool.
Where do I provide my VIN?
You can add your 17-digit VIN to the notes section during the checkout process. If you forget, we will contact you via email to retrieve it before we can program and ship your part.
Is this compatible with my original part number?
This ECM, 12622141, is a direct replacement for several part numbers, including 12612384 and 12617568. As long as your vehicle is on the fitment list, this module will function correctly.
What if my truck has modifications?
This ECM is programmed with the original factory GM calibration. It is not designed for vehicles with significant aftermarket modifications like forced induction or internal engine changes.
What is the installation process?
First, disconnect the vehicle’s battery. Locate the ECM on the driver’s side, under the battery tray. Carefully unplug the electrical connectors and unbolt the module. Install the new module, reconnect the connectors, and finally, reconnect the battery.