Restore Peak Performance to Your GM Vehicle
Is your Cadillac, Chevrolet, or GMC truck or SUV suddenly plagued with baffling issues? Intermittent stalling, a persistent check engine light, poor fuel economy, or a frustrating no-start condition can often be traced back to a single, critical component: the Engine Control Module (ECM). As a technician with over two decades of experience under the hood, I’ve seen how a failing ECM can mimic a dozen other problems, leading to costly and incorrect repairs. This isn’t just a part; it’s the central computer for your engine, and when it falters, your vehicle’s reliability is compromised.
This 2017 Escalade ESV Engine Module is the definitive solution. We take the guesswork out of the repair by pre-programming the module with the latest GM factory software, specifically matched to your vehicle’s VIN. This means it arrives ready for installation, saving you the time, expense, and hassle of a trip to the dealership for programming. You provide your VIN, and we handle the complex calibration work before it ever leaves our facility.
Case Study: A Tricky Diagnosis
A 2017 Sierra 1500 came into my shop with a complaint of random stalling at stoplights and a check engine light with a P0606 code (ECM/PCM Processor Fault). The owner had already replaced the throttle body and a few sensors with no luck. After verifying power and grounds to the ECM were solid, I knew the internal processor was the culprit. Swapping in a pre-programmed module like this one had the truck running perfectly in under an hour, including the final relearn procedures. It’s a textbook example of how a quality, correctly programmed module is the only right answer for these internal faults.
Is Your Vehicle Showing These Symptoms?
A failing ECM can manifest in numerous ways. If you’re experiencing any of the following, this module is likely the solution you need.
- âś” Engine stalling or misfiring for no apparent reason.
- âś” Complete no-start condition where the engine cranks but won’t fire.
- âś” Check Engine Light is on with internal processor codes (e.g., P0601, P0606).
- âś” Noticeable decrease in fuel efficiency.
- âś” Transmission shifting issues or harsh engagement.
- âś” Communication errors with other vehicle modules (U-codes).
- âś” Erratic behavior from gauges on the instrument cluster.
A Straightforward Guide to Installation
Installing your new 2017 Escalade ESV Engine Module is a manageable job for a seasoned DIYer or any professional technician. Follow these steps carefully for a successful replacement.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before beginning any electrical work.
- Locate the ECM: On most listed trucks and SUVs, the ECM is found in the engine compartment on the driver’s side (LH front). On some cars like the Corvette, it may be under the dash on the passenger side (RH cowl). Consult a service manual for your specific model if unsure.
- Disconnect and Remove: Carefully unplug the electrical connectors. They have locking tabs that must be released. Once disconnected, unbolt the old module from its mounting bracket and remove it from the vehicle.
- Install the New Module: Bolt the new, pre-programmed ECM into place and securely reconnect all electrical harnesses. Ensure they click into place.
- Reconnect Battery: Reattach the negative battery terminal.
- Perform Relearn Procedures: This is a critical step. If the vehicle does not start, you must perform the Vehicle Theft Deterrent (VTD) relearn using a GM-compliant scan tool or software like TIS2Web/Techline Connect. Other procedures like a crankshaft position variation relearn may also be required for optimal performance. This is the responsibility of the installer.
Verified Vehicle Compatibility
This module, part number 12704476, is a direct replacement for several original part numbers, including 12692068, 12686382, 12674052, 12674472, and 12678815. It is guaranteed to fit the following vehicles:
- 2017 Cadillac Escalade / Escalade ESV
- 2017 Cadillac XTS (3.6L Twin Turbo, LF3)
- 2017 Cadillac CTS (6.2L Supercharged or 3.6L Twin Turbo)
- 2017 Cadillac ATS (3.6L Twin Turbo, LF4)
- 2017 Chevrolet Corvette
- 2017 Chevrolet Tahoe / Suburban 1500
- 2017-2018 Chevrolet Silverado 1500
- 2017-2018 GMC Sierra 1500 / Sierra Denali 1500
- 2017 GMC Yukon / Yukon XL 1500
- 2016 Chevrolet Silverado 1500 (with ID 12674472)
- 2016 GMC Sierra 1500 (with ID 12674472)
Frequently Asked Questions
Frequently Asked Questions
Do I need to send you my old ECM?
No, there is no core charge or need to send your old part back to us. This is a direct purchase.
How do I provide my VIN number?
After you complete your purchase, you will need to message us with your 17-digit Vehicle Identification Number (VIN). We cannot program and ship your module without it.
What if my vehicle doesn’t start after installation?
This is typically due to the vehicle’s anti-theft system. You must perform a Vehicle Theft Deterrent (VTD) relearn procedure using a professional tool like GM’s TIS2Web or Techline Connect. This is a standard procedure for ECM replacement on these vehicles.
Is this 2017 Escalade ESV Engine Module difficult to install?
The physical installation is straightforward, involving unplugging the old unit and plugging in the new one. However, the final electronic relearn procedures require specific tools and knowledge. We recommend this for experienced DIYers or professional mechanics.
Will this fix my specific check engine light code?
This module will resolve issues related to internal ECM failure, such as code P0606. However, you should always perform a complete vehicle diagnosis to ensure the ECM is the root cause of the problem before ordering.