Restore Your GM’s Performance with a VIN-Programmed Engine Computer
Is your 2017 GMC Yukon XL 1500 suffering from frustrating issues like intermittent stalling, poor fuel mileage, a persistent check engine light, or a no-start condition? Before you resign yourself to a costly and time-consuming dealership visit, consider the root cause: a failing Engine Control Module (ECM). As a technician with over two decades of experience under the hood, I’ve seen firsthand how a faulty ECM can cripple an otherwise healthy vehicle. This module is the brain of your engine, and when it falters, the symptoms can be unpredictable and difficult to diagnose.
We offer a straightforward, reliable solution. This genuine GM Engine Control Module, part number 12674052, arrives at your door pre-programmed with the latest official GM software updates, tailored specifically to your vehicle’s Vehicle Identification Number (VIN). This eliminates the most complex step of the replacement process, saving you time and the expense of specialized programming tools. By providing us with your VIN during checkout, you ensure that the 2017 Yukon XL 1500 ECM you receive is ready for installation and configured for your truck’s specific systems.
A Technician’s Notebook
I remember a 2017 Sierra that came into the shop with a ghost of a problem. The owner complained of random stalling at red lights and occasional harsh shifting, but no consistent trouble codes. We checked everything—fuel pressure, sensors, wiring harnesses. After hours of diagnostics, we noticed a slight voltage drop at the ECM connector during a wiggle test. The original module had a hairline crack in a solder joint internally, causing it to fail only when it heated up. Swapping in a VIN-programmed ECM like this one resolved all the issues instantly. It’s a reminder that a solid ECM is the foundation of a reliable engine.
Common Signs of a Failing Engine Module
- ✔ Check Engine Light (CEL) is illuminated with codes like P0601, P0606, or U0100.
- ✔ Your vehicle refuses to start or experiences intermittent starting problems.
- ✔ Noticeable decrease in fuel economy.
- ✔ Engine stalling, stuttering, or misfiring for no apparent reason.
- ✔ Unexplained loss of power and poor acceleration.
- ✔ Problems with automatic transmission shifting, such as harsh or delayed shifts.
A Straightforward Guide to Installation
- ✔ Safety First: Always disconnect the negative terminal from your vehicle’s battery before beginning work.
- ✔ Locate the ECM: On most compatible trucks and SUVs, the ECM is found in the engine compartment on the driver’s side (LH).
- ✔ Disconnect Connectors: Carefully release the locking tabs and unplug the wiring harnesses from the old module. Inspect 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 2017 Yukon XL 1500 ECM and securely reconnect the wiring harnesses.
- ✔ Reconnect Battery: Reattach the negative battery terminal.
- ✔ Perform Relearn Procedures: As noted, you or your mechanic must perform the GM Vehicle Theft Deterrent System relearn using a compatible scan tool (like Tis2web/Techline Connect) for the vehicle to start. Other procedures like a crankshaft variation relearn may also be necessary.
Verified Vehicle Compatibility
This module is a direct-fit replacement for several GM vehicles and part numbers, including 12692068, 12704476, 12686382, 12674472, and 12678815. It is confirmed 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
- 2016-2018 Chevrolet Silverado 1500
- 2017 GMC Yukon & 2017 Yukon XL 1500 ECM
- 2016-2018 GMC Sierra 1500 & Sierra Denali 1500
Frequently Asked Questions
Do I need to send my old ECM (core) back?
No core charge or return is required for this part, saving you the hassle and cost of return shipping.
Is this a new or used part?
This is a high-quality, tested replacement part guaranteed to function correctly once installed and necessary relearn procedures are completed.
What happens if I don’t do the theft relearn?
The vehicle’s anti-theft system will not recognize the new ECM, and it will prevent the engine from starting. This is a mandatory security step on all modern GM vehicles.
Can I do the relearn procedures myself?
The theft and crankshaft variation relearns require professional-grade scan tools with access to GM’s software (Tis2web or Techline Connect). Most DIY code readers cannot perform these functions. We recommend professional installation if you do not have this equipment.
How long does the programming take?
We program the module after you provide your VIN, typically within one business day, ensuring it ships out to you as quickly as possible with the correct software.
What if my part number is slightly different?
This ECM replaces multiple part numbers. As long as your vehicle is on the compatibility list, this module will work. The key is programming it to your specific VIN.