Restore Peak Performance to Your GM Vehicle
Are you experiencing frustrating issues with your 2016 Chevrolet Suburban 3500, such as a persistent check engine light, poor fuel economy, stalling, or a no-start condition? These are common indicators of a failing Engine Control Module (ECM), the central computer that manages your engine’s performance. A faulty ECM can disrupt everything from fuel injection and ignition timing to transmission shifting, leading to a cascade of problems. This replacement Engine Control Module, part number 12670335, is the definitive solution to restore your vehicle’s power, efficiency, and reliability.
Is Your Vehicle Showing Signs of ECM Failure?
A failing ECM can manifest in various ways, often mimicking other component failures. If you’re noticing any of the following symptoms, it’s time to consider your engine computer as the root cause:
- ✔ Persistent Check Engine Light (CEL) that won’t clear or returns with various codes.
- ✔ Unexplained engine stalling, misfiring, or stumbling during acceleration.
- ✔ A noticeable and sudden decrease in fuel efficiency.
- ✔ Difficulty starting the engine, requiring multiple cranks, or a complete no-start situation.
- ✔ Rough or erratic idling that makes the vehicle shake.
- ✔ Harsh or delayed transmission shifting.
- ✔ Communication errors when trying to read codes with a diagnostic scan tool.
From the Diagnostic Bay
We recently had a 2015 GMC Sierra 2500 (which uses this same ECM family) in the shop with a persistent P0606 code, indicating an internal processor fault. The owner had spent a significant amount of money replacing spark plugs, ignition coils, and even the throttle body, chasing what he believed were separate performance issues. After confirming stable power and ground to the module, we knew the computer itself was the culprit. We installed a VIN-programmed module just like this one. The truck fired up instantly and ran perfectly smooth, with all diagnostic codes cleared. This single part saved the customer from hundreds more in wasted diagnostic time and unnecessary parts.
The Plug-and-Play Solution: A Pre-Programmed 2016 Suburban 3500 ECM
What sets this ECM apart is our professional programming service. Dealerships often charge hundreds of dollars for programming alone, but we include it with your purchase. When you order, simply provide us with your vehicle’s 17-digit Vehicle Identification Number (VIN). Our technicians will then flash the module with the latest, most stable GM-approved software specific to your vehicle’s configuration. This ensures that the ECM communicates flawlessly with your engine, transmission, and all other onboard systems right out of the box. This process corrects common software-related bugs and drivability issues, guaranteeing optimal performance and a seamless installation process.
Broad Compatibility for Numerous GM Models
While this is the ideal replacement for the 2016 Suburban 3500 ECM, its versatility extends to a wide range of other General Motors cars, trucks, and vans. This module, part number 12670335, is a direct replacement for several other part numbers, including 12668866, 12668994, 12643636, 12663405, 22819494, and 12692200. It is a compatible fit for vehicles like the Chevrolet Cruze, Sonic, Trax, Volt, Spark, and Encore, as well as heavy-duty workhorses like the Silverado/Sierra 2500/3500 pickups and Express/Savana vans. To ensure a perfect fit, please match one of these part numbers to the one on your original module.
Installation Guidelines
Replacing the ECM is a straightforward task for a knowledgeable DIYer or any professional mechanic. The module is typically located in the engine compartment. After disconnecting the battery and carefully removing the electrical connectors, simply unbolt the old unit and install the new one. Once installed, some vehicles may require a security relearn procedure (also known as a CASE relearn or anti-theft relearn) to synchronize the new ECM with your vehicle’s keys and security system. This procedure is often simple and can be completed without special tools in just a few minutes.
Frequently Asked Questions
What information do you need to program the ECM?
We require your vehicle’s 17-digit Vehicle Identification Number (VIN) to program the module correctly. Please provide it during or after checkout to ensure your order is processed without delay.
Is this part truly plug-and-play?
Yes, it is programmed to be plug-and-play. However, depending on your specific GM model, a simple security relearn procedure may be necessary after installation to sync the module with your vehicle’s anti-theft system. This can usually be done without any special tools.
Will this fix my check engine light?
If the check engine light and associated diagnostic trouble codes are caused by a faulty ECM, then yes, this replacement part will resolve the issue. It’s crucial to have a proper diagnosis to confirm the ECM is the point of failure.
Do I need to send my old ECM back?
No, there is no core charge or requirement to return your old module. You can keep it or dispose of it responsibly.
Does this ECM come with a warranty?
Absolutely. This part comes with a standard warranty that protects you against any defects in materials or workmanship, giving you peace of mind with your purchase.