Restore Peak Performance to Your GM Vehicle
Is your Escalade, Sierra, or Tahoe suffering from frustrating and unpredictable issues like stalling, a no-start condition, or a persistent Check Engine Light? These are classic signs of a failing Engine Control Module (ECM), the central computer that manages your vehicle’s engine performance, fuel delivery, and emissions. When it falters, your vehicle’s reliability and drivability are compromised. This isn’t just an inconvenience; it can leave you stranded. I’ve seen it countless times in my 20+ years in the shop—a perfectly good engine crippled by a faulty electronic brain.
This replacement 2017 Escalade ESV Engine Control Module is the definitive solution. We take the guesswork and high dealership costs out of the equation by pre-programming the module to your vehicle’s specific Vehicle Identification Number (VIN) before it ever leaves our facility. This ensures it arrives with the latest, most stable software updates directly from GM, tailored for your exact vehicle configuration. It’s the key to a smooth, reliable repair.
Case Study: A Tricky Diagnosis
A customer brought in his 2017 Sierra 1500 with a complaint that stumped two other shops: it would randomly refuse to start, but only after being driven for over an hour. There were no consistent trouble codes, just a frustrating intermittent problem. After checking the basics—battery, starter, fuel pressure—I focused on data streaming from the ECM. I noticed that key sensor readings would drop out randomly when the engine bay was hot. Instead of a sensor, the issue was the ECM itself suffering from thermal failure. Swapping in a VIN-programmed module like this one and performing the security relearn solved the problem permanently. It’s a reminder that the ECM is the core of the system, and its failure can mimic many other issues.
Is Your Vehicle Showing These Symptoms?
A failing ECM can manifest in numerous ways. If you’re experiencing any of the following, it’s a strong indicator that your engine computer needs replacement:
- ✔ Complete no-start or intermittent starting problems.
- ✔ Engine stalling unexpectedly while driving or at idle.
- ✔ Drastically reduced fuel economy for no apparent reason.
- ✔ A persistent Check Engine Light with communication codes (e.g., U0100) or internal processor fault codes (e.g., P0601, P0606).
- ✔ Rough running, misfires, or hesitation during acceleration.
- ✔ Inability of diagnostic scan tools to communicate with the ECM.
A Straightforward Guide to Installation
Replacing your ECM is a manageable job for a confident DIYer or any professional technician. Our pre-programming service handles the most complex part, leaving you with the physical installation and a final setup procedure.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before beginning any electronic work.
- Locate the ECM: On most compatible trucks and SUVs, the ECM is located in the engine compartment on the driver’s side (LH front). On vehicles like the Corvette or XTS, its location may differ (e.g., RH cowl), so verify its position on your specific model.
- Disconnect and Remove: Carefully unplug the wiring harness connectors. They have locking tabs that must be released. Once disconnected, unbolt the old module from its mounting bracket and remove it.
- Install the New Module: Mount the new, pre-programmed ECM in place and securely fasten it. Reconnect the wiring harnesses, ensuring they click firmly into place.
- Reconnect the Battery: Reattach the negative battery terminal.
- CRITICAL FINAL STEP: The vehicle will NOT start until a Vehicle Theft Deterrent System (VTDS) relearn is performed. This procedure pairs the new ECM with your vehicle’s security system. This requires a compatible scan tool with access to GM’s TIS2Web or Techline Connect service. Other procedures, like a crankshaft position variation relearn, may also be necessary to ensure optimal performance and clear any related trouble codes. This is the responsibility of the installer.
Verified Vehicle Compatibility
This module is a direct-fit replacement for a wide range of GM cars, trucks, and SUVs. Please verify your vehicle and options below. This unit replaces part numbers 12692068, 12704476, 12686382, 12674052, 12674472, and 12678815.
- Cadillac Escalade / Escalade ESV: 2017
- Cadillac XTS: 2017 (3.6L Twin Turbo, VIN 8, opt LF3)
- Cadillac CTS: 2017 (6.2L Supercharged or 3.6L Twin Turbo)
- Cadillac ATS: 2017 (3.6L, VIN Y, opt LF4)
- Chevrolet Tahoe / Suburban 1500: 2017
- Chevrolet Corvette: 2017
- Chevrolet Silverado 1500: 2016 (ID 12674472), 2017, 2018 (ID 12686382)
- GMC Yukon / Yukon XL 1500: 2017
- GMC Sierra 1500 / Sierra Denali 1500: 2016 (ID 12674472), 2017, 2018 (ID 12686382)
Frequently Asked Questions
Why do you need my VIN?
Your VIN is essential. We use it to load the precise, factory-correct software and calibrations for your vehicle’s specific engine, transmission, and options. This ensures compatibility and proper function, saving you a trip to the dealer for programming.
What is a “theft relearn” and can I do it myself?
The theft relearn syncs the new ECM to your vehicle’s ignition keys and security system. Without it, the vehicle will not start. This procedure requires a professional-grade scan tool with a subscription to GM’s programming software (TIS2Web/Techline Connect). Most DIY scan tools cannot perform this function. We strongly recommend having a qualified mechanic lined up for this final step.
Is this part difficult to install?
The physical replacement is straightforward for anyone comfortable with basic auto repair—it involves unplugging connectors and removing a few bolts. The most critical part is ensuring the post-installation electronic relearn procedures are completed correctly by a qualified technician.
Will this fix my Check Engine Light?
If the Check Engine Light is caused by an internal ECM failure (like codes P0601-P0606) or related communication faults, this part is the correct fix. However, you should always perform a full diagnosis to ensure there aren’t other underlying issues (e.g., bad sensors, wiring problems) causing the light.