Restore Peak Performance and Reliability to Your GM Truck
Is your Sierra, Silverado, or other GM vehicle acting up? Dealing with a persistent Check Engine Light, rough idling, stalling, or a frustrating no-start condition? These are classic signs of a failing Engine Control Module (ECM), the central computer that manages your engine’s performance, fuel economy, and emissions. When the brain of your vehicle falters, it can cause a wide range of confusing and costly problems. This isn’t just an inconvenience; it’s a critical component failure that needs a reliable solution.
This isn’t just a replacement part; it’s a direct solution. We provide a high-quality Engine Control Module, part number 12692068, that arrives at your door pre-programmed with the latest official GM software. We use your vehicle’s VIN to ensure the calibration is a perfect match, eliminating the need for an expensive trip to the dealership for initial programming. This saves you significant time and money, getting your truck back to factory-spec operation faster.
From the Diagnostic Bay: The Case of the Intermittent Stall
I once had a 2017 Silverado 1500 in my shop that was driving its owner crazy. It would run perfectly for days, then suddenly stall at a stoplight. No codes, no warning. We checked fuel pressure, sensors, and wiring—everything seemed fine. The problem was so intermittent, it was nearly impossible to replicate. Finally, after data-logging a long test drive, we caught a momentary communication drop from the ECM. The internal processor was failing under specific thermal conditions. Swapping in a quality, correctly programmed ECM like this one solved the problem permanently. It’s a reminder that a faulty ECM can cause some of the most elusive and frustrating vehicle issues.
Is Your Truck Exhibiting These ECM Failure Signs?
A failing ECM can manifest in many ways. If you’re experiencing any of the following, your engine’s computer may be the culprit. Look out for these common indicators:
- ✔ Persistent Check Engine Light (CEL) that won’t clear.
- ✔ Diagnostic Trouble Codes (DTCs) pointing to internal module failure, such as P0601, P0602, P0606, or U0100.
- ✔ Unexplained drop in fuel efficiency.
- ✔ Engine stalling, sputtering, or misfiring.
- ✔ Hard starting or complete no-start conditions.
- ✔ Poor or erratic automatic transmission shifting.
- ✔ Loss of communication with other vehicle modules.
Your Step-by-Step Installation Roadmap
Replacing your 2016 – 2018 Sierra 1500 Engine Control Module is a manageable job for a confident DIYer or a straightforward task for any professional technician. Follow these general steps for a successful installation.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and secure it away from the post to prevent any accidental power surges.
- Locate the ECM: On most GM trucks like the Sierra and Silverado, the ECM is located in the engine compartment on the driver’s side (LH front).
- Disconnect Connectors: Carefully release the locking tabs and disconnect all wiring harness connectors from the old ECM. Inspect the connectors for any corrosion or damage.
- Remove the Old Module: Unbolt the old ECM from its mounting bracket.
- Install the New Module: Mount your new, pre-programmed ECM securely onto the bracket.
- Reconnect Everything: Firmly plug all wiring harnesses back into the new module. Ensure you hear a ‘click’ to confirm they are seated correctly. Reconnect the negative battery terminal.
- Perform Relearn Procedures: This is a critical step. You or your mechanic will need to perform the Vehicle Theft Deterrent System (VTDS) relearn using a compatible scan tool with access to GM’s TIS2WEB or Techline Connect. The vehicle will not start until this security handshake is completed. Other procedures like a crankshaft position variation relearn may also be necessary.
Verified Compatibility for Your GM Vehicle
This module is a direct replacement for part numbers 12692068, 12704476, 12686382, 12674052, 12674472, and 12678815. It is guaranteed to fit the following vehicles and options:
- ATS (2017): 3.6L, VIN Y (LF4)
- CTS (2017): 6.2L (Supercharged) & 3.6L, VIN 8 (LF3, Twin Turbo)
- Corvette (2017): All models
- Escalade & Escalade ESV (2017): All models
- Silverado 1500 Pickup (2016-2018): Check specific ID numbers for 2016/2018 models.
- Sierra 1500 Pickup (2016-2018): The ideal 2016 – 2018 Sierra 1500 Engine Control Module solution. Check specific ID numbers for 2016/2018 models.
- Sierra Denali 1500 (2017-2018): Check specific ID numbers for 2018 models.
- Suburban 1500 (2017): All models
- Tahoe (2017): All models
- XTS (2017): 3.6L, VIN 8 (LF3)
- Yukon & Yukon XL 1500 (2017): All models