Restore Peak Performance to Your GM Truck or SUV
Is your 2017 Chevrolet Suburban 1500 experiencing frustrating issues like erratic idling, stalling, poor fuel economy, or a persistent Check Engine Light? These are classic signs of a failing Engine Control Module (ECM), the electronic brain of your vehicle. Don’t let a faulty computer keep you off the road. This direct-fit ECM, part number 12704476, is the reliable, professional-grade solution to get your vehicle running smoothly again.
We take the guesswork and hassle out of the replacement process. Unlike a blank module that requires expensive dealer tools, this ECM arrives at your door pre-programmed with the latest official GM software updates. All we need is your vehicle’s 17-digit VIN during checkout. Our technicians will flash the module specifically for your vehicle’s configuration, ensuring it communicates perfectly with the rest of your systems right out of the box. This is the most efficient way to restore factory performance and drivability.
Case Study: A Tricky Diagnosis
A customer brought in a 2017 Yukon XL with a complaint of intermittent stalling at stoplights and a P0606 (ECM/PCM Processor Fault) code that would pop up randomly. They had already replaced the throttle body and a camshaft position sensor based on advice from online forums, but the problem persisted. In my shop, we see this often. After verifying power and grounds to the module were solid, we knew the internal processor of the original ECM was failing. Swapping in a VIN-programmed module like this one resolved all the issues in under an hour. It’s a reminder that chasing sensor codes can be a costly dead end when the central computer itself is the root cause.
Is Your Vehicle Showing These Symptoms?
- ✔ Unexplained Check Engine Light with codes like P0601, P0606, or U0100.
- ✔ Vehicle refuses to start or has difficulty starting.
- ✔ Sudden stalling or rough running conditions.
- ✔ Noticeable decrease in fuel efficiency.
- ✔ Harsh or incorrect automatic transmission shifting.
- ✔ Communication issues with diagnostic scan tools.
Your Straightforward Installation Guide
Replacing the ECM is a manageable job for a confident DIYer or a quick task for any professional mechanic. Follow these steps for a successful installation.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before beginning any electronic work.
- Locate the Module: On the Suburban, Tahoe, and most GM trucks, the ECM is located in the left-hand (driver’s side) front of the engine compartment.
- Disconnect and Remove: Carefully unplug the electrical connectors. They have locking tabs that must be released. Once disconnected, unbolt the old ECM from its mounting bracket.
- Install the New ECM: Mount the new module securely onto the bracket and reconnect all electrical connectors, ensuring they click firmly into place.
- Reconnect Power: Reattach the negative battery terminal.
- Perform Relearn Procedures: If the vehicle does not start, you must perform a Vehicle Theft Deterrent (VTD) relearn using a compatible GM diagnostic tool (like TIS2Web/Techline Connect). Other procedures, such as a crankshaft variation relearn, may also be necessary to ensure optimal performance. Please note: Performing these relearn procedures is the responsibility of the installer.
Guaranteed Fitment for Your GM Vehicle
This module is a direct replacement for part numbers 12692068, 12704476, 12686382, 12674052, 12674472, and 12678815. It is verified to fit the following models:
- 2017 Cadillac Escalade & Escalade ESV
- 2017 Cadillac XTS (3.6L Twin Turbo, VIN 8)
- 2017 Cadillac CTS (6.2L Supercharged or 3.6L Twin Turbo)
- 2017 Cadillac ATS (3.6L, VIN Y)
- 2017 Chevrolet Corvette
- 2017 Chevrolet Tahoe
- 2017 Chevrolet Suburban 1500
- 2017-2018 Chevrolet Silverado 1500
- 2017 GMC Yukon & Yukon XL 1500
- 2017-2018 GMC Sierra 1500 & Sierra Denali 1500
- 2016 Chevrolet Silverado 1500 (ID 12674472)
- 2016 GMC Sierra 1500 (ID 12674472)
Frequently Asked Questions
Frequently Asked Questions
How do I provide my VIN for programming?
After you complete your purchase, you will receive instructions on how to send us your vehicle’s 17-digit VIN. We cannot ship your order until we receive and validate your VIN, as it is essential for programming the module correctly.