Restore Peak Performance to Your GM Truck or SUV
Is your Sierra, Silverado, Tahoe, or other compatible GM vehicle plagued by a persistent check engine light, erratic engine behavior, or a frustrating no-start condition? A failing Engine Control Module (ECM) is often the culprit. As the central computer for your engine, its proper function is critical. This module is the direct, reliable solution to get your vehicle back on the road, running as the factory intended.
We take the guesswork out of the repair. Simply provide your vehicle’s VIN during checkout, and our technicians will program this ECM with the latest, most stable software updates directly from GM. This ensures seamless communication with your vehicle’s existing systems, from the transmission to the instrument cluster.
Common Symptoms of a Failing ECM:
- โ Persistent Check Engine Light (CEL) with various communication or processor codes.
- โ Engine stalling, misfiring, or running rough.
- โ Unexplained loss of power and poor fuel economy.
- โ Intermittent or complete no-start situations.
- โ Issues with automatic transmission shifting.
A Technician’s Real-World Experience
“A customer’s 2017 Sierra 1500 came into my shop last month with a no-start condition that had two other shops stumped. They had replaced the fuel pump and crankshaft position sensor, but the truck would only crank. After confirming power and ground at the ECM connectors, my diagnostic scan tool couldn’t establish communication with the module. It was completely offline. We installed one of our VIN-programmed ECMs, performed the security relearn, and the truck fired up on the first try. Itโs a classic case where chasing individual sensors costs more time and money than addressing the core processing failure in the ECM itself.”
Easy Installation for the 2017-2018 Sierra Denali ECM
Replacing the ECM is a straightforward process. While professional installation is always an option, many DIY-savvy owners can complete the job with basic tools.
- Safety First: Disconnect the negative terminal from your vehicle’s battery.
- Locate the ECM: On most trucks like the Sierra and Silverado, the ECM is located in the engine compartment on the driver’s side, near the firewall or inner fender.
- Disconnect Connectors: Carefully release the locking tabs on the electrical wiring harnesses and pull them straight out from the module. Inspect the pins for any corrosion or damage.
- Remove the Old Module: Unbolt the old ECM from its mounting bracket and remove it from the vehicle.
- Install the New ECM: Mount your new, pre-programmed ECM onto the bracket and securely fasten it.
- Reconnect Everything: Plug the wiring harnesses back into the new module until they click firmly into place. Reconnect the negative battery terminal.
IMPORTANT: Post-Installation Relearn Procedures
This is a critical step. Because this ECM is programmed to your VIN, it is already matched to your vehicle’s specific hardware and software calibrations. However, for security, a Vehicle Theft Deterrent System (VTDS) Relearn is often required. If your vehicle does not start after installation, this procedure MUST be performed using a GM-specific diagnostic tool with access to Tis2web or Techline Connect. Other procedures, like a Crankshaft Variation Relearn or injector flow rate programming, may also be necessary depending on your specific vehicle and situation. The responsibility for performing these final setup procedures lies with the installer.
This ECM is a direct replacement for the following part numbers:
12692068, 12704476, 12686382, 12674052, 12674472, 12678815
Guaranteed Fitment For These Vehicles:
- ATS 2017 (3.6L, VIN Y)
- CORVETTE 2017
- CTS 2017 (6.2L Supercharged or 3.6L Twin Turbo VIN 8)
- ESCALADE & ESCALADE ESV 2017
- SIERRA 1500 PICKUP 2016-2018
- SIERRA DENALI 1500 2017-2018
- SILVERADO 1500 PICKUP 2016-2018
- SUBURBAN 1500 2017
- TAHOE 2017
- XTS 2017 (3.6L, VIN 8)
- YUKON & YUKON XL 1500 2017