Restore Peak Performance to Your GM Truck or SUV
Is your 2017 Chevy Tahoe or other GM vehicle suffering from frustrating, hard-to-diagnose issues? An erratic check engine light, unexplained stalling, or a complete no-start condition can often be traced back to a failing Engine Control Module (ECM). As the central computer for your engine, its health is critical. This replacement ECM, part number 12692068, is the definitive solution to get your vehicle running reliably again. We take the guesswork and dealership hassle out of the equation by pre-programming the module to your vehicle’s specific VIN with the latest GM-approved software updates before it ever leaves our facility.
Is Your Vehicle Showing These Symptoms?
- ✔ Unexplained Check Engine Light with codes like P0601, P0606 (Internal Control Module Processor Error), or U0100 (Lost Communication With ECM/PCM).
- ✔ Intermittent or total no-start condition where the engine cranks but won’t fire.
- ✔ Poor engine performance, including rough idling, hesitation, or reduced power.
- ✔ Decreased fuel economy without any change in driving habits.
- ✔ Communication issues with diagnostic scan tools.
- ✔ Problems with transmission shifting, as the ECM communicates directly with the TCM.
Case Study: A Tricky Diagnosis
I recently had a 2017 Silverado 1500 in the bay with a complaint that stumped two other shops: it would randomly fail to start, but only after being driven for over an hour. No codes were stored. We checked the battery, starter, and all primary wiring—everything tested perfectly. On a hunch, I monitored the ECM data stream during a long test drive. Just as the customer described, after about 75 minutes, the truck stalled and wouldn’t restart. The scan tool now showed no communication with the ECM. The module was overheating internally, causing a thermal failure. Replacing the old unit with a quality, pre-programmed 2017 Tahoe Engine Control Module like this one solved the problem permanently. It’s a classic failure mode I’ve seen dozens of times on this GM platform.
A Straightforward Guide to Installation
Installing your new ECM is a manageable job for a seasoned DIYer or any professional technician. By receiving a module already programmed for your vehicle, you’ve already handled the most complex step. Just follow these general guidelines.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- Locate the ECM: On most compatible trucks and SUVs like the Tahoe and Sierra, the ECM is located in the engine compartment on the driver’s side (LH front).
- Disconnect and Remove: Carefully unplug the electrical connectors. They have locking tabs that must be released. Then, unbolt the module from its mounting bracket.
- Install the New Module: Bolt the new ECM into place and securely reconnect all electrical harnesses. Ensure they click into place.
- Reconnect Battery: Reattach the negative battery terminal.
- Critical Final Step – Security Relearn: Turn the key to the ‘ON’ position. If the vehicle does not start, you MUST perform a Vehicle Theft Deterrent (VTD) relearn procedure. This requires a compatible scan tool with access to GM’s TIS2Web or Techline Connect system. This synchronizes the new ECM with your vehicle’s anti-theft system. Other relearns, like for the crankshaft position sensor, may also be necessary depending on your specific vehicle.
Will This Fit My Vehicle?
This module is a direct replacement for part numbers 12692068, 12704476, 12686382, 12674052, 12674472, and 12678815. It is guaranteed to fit the following models and years:
- Cadillac ATS: 2017 (3.6L, VIN Y)
- Cadillac CTS: 2017 (6.2L Supercharged & 3.6L Twin Turbo VIN 8)
- Cadillac Escalade / ESV: 2017
- Cadillac XTS: 2017 (3.6L, VIN 8)
- Chevrolet Corvette: 2017
- Chevrolet Silverado 1500: 2016 (ID 12674472), 2017, 2018 (ID 12686382)
- Chevrolet Suburban 1500: 2017
- Chevrolet Tahoe: 2017
- GMC Sierra 1500 / Denali 1500: 2016 (ID 12674472), 2017, 2018 (ID 12686382)
- GMC Yukon / Yukon XL 1500: 2017
Frequently Asked Questions
Do I need to send my old ECM back?
No core charge or return is required for this part, saving you time and return shipping costs.
What information do you need from me?
After you place your order, you must provide us with your vehicle’s 17-digit VIN. We cannot program and ship your module without it.
What is a VTD or Security Relearn?
It’s a security procedure that syncs the new ECM to your vehicle’s ignition keys and anti-theft system. If this is not performed, your vehicle will not start. This procedure requires a professional scan tool with GM software access.
Is this a simple plug-and-play part?
It is plug-in, but not always plug-and-play. While we handle the main programming, you or your mechanic are responsible for performing the final on-vehicle security relearn and any other necessary setup procedures like a crankshaft variation relearn.
Will this fix my specific problem?
This part corrects issues directly caused by a faulty ECM. While it resolves the most common problems, you should always have a proper diagnosis performed by a qualified technician to confirm the ECM is the source of your issue before ordering.