Programmed 2012-2016 Silverado 3500 ECM 12692200 | VIN Matched

Restore Your Silverado’s Performance and Reliability

Is your 2012-2016 Silverado 3500 acting up? Experiencing frustrating issues like a persistent check engine light, random stalling, poor fuel economy, or a complete no-start condition? The Engine Control Module (ECM), the electronic brain of your truck’s 6.0L engine, is often the culprit. When it fails, it can create a cascade of problems that are difficult to diagnose. This isn’t just an inconvenience; it’s a reliability issue that can leave you stranded. This replacement ECM is the definitive solution, arriving at your door fully programmed to your truck’s specific Vehicle Identification Number (VIN).

Is Your Silverado HD Showing These Signs?

A failing engine computer can manifest in numerous ways. If you’re experiencing any of the following, a faulty ECM is a likely cause:

• ✔ Check Engine Light is on with codes like P0601 (Internal Control Module Memory Check Sum Error) or P0606 (ECM/PCM Processor Fault).
• ✔ Engine cranks but refuses to start.
• ✔ Unexplained drops in fuel efficiency.
• ✔ The engine stalls unexpectedly, either at idle or while driving.
• ✔ Harsh or erratic automatic transmission shifting.
• ✔ Loss of communication with the module, often indicated by a U-code (e.g., U0100).
• ✔ General poor engine performance, hesitation, or misfires.

The Power of Pre-Programmed, Plug-and-Play Simplicity

The biggest hurdle in replacing an ECM has always been the expensive and time-consuming programming required at a dealership. We eliminate that step entirely. When you order, you provide us with your truck’s VIN. Our technicians will then flash this module with the latest, most stable GM-approved software specific to your vehicle’s configuration. The 2012-2016 Silverado 3500 ECM you receive is ready for installation right out of the box. This means no towing fees, no dealer appointments, and no unexpected labor charges. It’s the most efficient way to get your heavy-duty truck back on the road.

A Straightforward Guide to Installation

Replacing the ECM on your Silverado is a manageable job for a confident DIYer or a quick task for any professional. It’s located in the left-front of the engine compartment.

1. Safety First: Always disconnect the negative terminal from your truck’s battery and wait at least 15 minutes for the system capacitors to discharge.
2. Locate the ECM: Open the hood and find the ECM on the driver’s side of the engine bay, typically near the battery or air filter housing.
3. Disconnect Connectors: Carefully release the locking tabs on the electrical wiring harness connectors and pull them straight out from the module. Do not force them.
4. Remove the Old Module: Unbolt the old ECM from its mounting bracket. Keep the hardware as you will reuse it.
5. Install the New ECM: Mount your new, pre-programmed ECM onto the bracket and secure it with the original hardware.
6. Reconnect Everything: Firmly plug the wiring harness connectors back into the new module until they click into place. Reconnect the negative battery terminal.
7. Perform Relearn: While the module is programmed, you will need to perform a security relearn procedure (often called a Passlock or anti-theft relearn). This typically involves turning the key to the ‘ON’ position for 10-15 minutes, then off, and repeating two more times before starting the engine. Consult your vehicle’s service information for the exact procedure.

Verified Vehicle Compatibility

This Engine Control Module, also known by part numbers 12668866, 12668994, 12643636, 12663405, 12670335, and 22819494, offers broad compatibility across the GM family. While it is a direct-fit solution for the 2012-2016 Silverado 3500 ECM with the 6.0L engine, it also fits the following vehicles. Always verify your part number or consult with us to ensure perfect fitment.