Restore Peak Performance to Your GM Vehicle
Is your 2015-2016 Cadillac Escalade, or another compatible GM truck or SUV, suffering from frustrating issues like a persistent check engine light, erratic engine behavior, or a complete no-start condition? As a technician with over two decades of experience under the hood, I’ve seen firsthand how a failing Engine Control Module (ECM) can be the root cause of problems that seem impossible to diagnose. It’s the brain of your engine, and when it falters, everything from fuel economy to transmission shifting can be affected. This isn’t just an inconvenience; it’s a critical failure that compromises your vehicle’s reliability.
This isn’t a generic, one-size-fits-all part. This is a direct-replacement Engine Control Module for part number 12669318. The most significant benefit we offer is our professional programming service. Before this module ships, we will flash it with the latest, most stable software updates from General Motors, specifically matched to your vehicle using your VIN. This means you can skip the expensive trip to the dealership, avoid towing fees, and eliminate the need for specialized programming tools. You’re getting a solution that’s ready for installation right out of the box.
A Technician’s Notebook: The Ghost in the Machine
I remember a 2015 Sierra 1500 that came into my bay with a laundry list of intermittent complaints: stalling at stoplights, hard shifting, and a check engine light that would come and go. The owner had already replaced a few sensors with no luck. A deep scan revealed a P0606 code (ECM/PCM Processor Fault) that only appeared under certain conditions. These internal processor faults are a dead giveaway. The ECM’s internal logic was failing, causing it to send corrupted commands to the rest of the vehicle. We installed a VIN-programmed module just like this one, and it was like a new truck. All the ghost-like issues vanished instantly. This is often the definitive fix when all other diagnostics lead to a dead end.
Is Your Vehicle Showing These Symptoms?
A faulty ECM can manifest in numerous ways. If you’re experiencing any of the following, this module is the likely solution.
- ✔ Check Engine Light is on with codes like P0601, P0602, P0606, or other internal processor errors.
- ✔ Communication error codes, such as U0100 (Lost Communication with ECM/PCM).
- ✔ Engine cranks but will not start.
- ✔ Noticeable drop in fuel efficiency.
- ✔ Rough or unstable idling.
- ✔ Engine stalling or misfiring unpredictably.
- ✔ Harsh or incorrect automatic transmission shifting.
- ✔ Failure to pass state emissions testing.
A Straightforward Guide to Installation
Installing your new 2015-2016 Escalade ECM is a manageable task for a confident DIYer. While the exact location can vary slightly by model (see fitment list), the process is generally similar for most GM trucks and SUVs.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait a few minutes for the system to fully discharge.
- Locate the ECM: On most Escalade, Tahoe, Yukon, Silverado, and Sierra models, the ECM is located in the front of the engine compartment on the driver’s side, near the air filter box.
- Disconnect Connectors: Carefully release the locking tabs on the electrical wiring harnesses and pull them straight out from the module. Never force them; they are designed to be removed smoothly when the levers are actuated.
- Remove the Module: Unbolt the mounting hardware that secures the old ECM to its bracket. Keep the bolts safe as you will reuse them.
- Install the New ECM: Mount your new, pre-programmed module in place using the original hardware. Reconnect the electrical connectors, ensuring they click securely into place and the locking tabs are engaged.
- Reconnect Battery: Reattach the negative battery terminal.
- Perform Relearn (If Necessary): In many cases, the vehicle will start and run perfectly. However, some vehicles may require a security or crankshaft position sensor relearn procedure, which can often be initiated with a capable bi-directional scan tool or by following a specific sequence of key cycles.
Verified Vehicle Compatibility
This module is a direct replacement for part number 12669318 and is also compatible with part numbers 12692067, 12676230, 12656993, 12662034, 12672537, 12673195, 12663391, and 12672963. It is guaranteed to fit the following vehicles:
- Cadillac ATS: 2014-2016 (3.6L)
- Cadillac CTS: 2014-2016 (3.6L & 6.2L)
- Cadillac Escalade / ESV: 2015-2016
- Cadillac XTS: 2014-2016 (3.6L)
- Chevrolet Camaro: 2016 (6.2L)
- Chevrolet Colorado: 2015-2016 (3.6L)
- Chevrolet Corvette: 2014-2016
- Chevrolet Silverado 1500: 2014-2016
- Chevrolet Suburban 1500: 2015-2016
- Chevrolet Tahoe: 2015-2016
- GMC Canyon: 2015-2016 (3.6L)
- GMC Sierra 1500 / Denali 1500: 2014-2016
- GMC Yukon / Yukon XL 1500: 2015-2016
Please provide your VIN upon purchase to ensure we load the correct software for your specific vehicle and its options.
What do you mean by ‘programmed to my VIN’?
What do you mean by ‘programmed to my VIN’?
We use your 17-digit Vehicle Identification Number (VIN) to access GM’s database and install the exact factory software your vehicle requires. This includes calibrations for the engine, transmission, and any specific options your vehicle has. This makes the module a true plug-and-play part, eliminating the need for dealership programming.
Will I need to do anything else after installation?
In most cases, no. The vehicle should start and run correctly. Some GM vehicles may require a simple security relearn or a Case/Crankshaft Position Variation Relearn. This can typically be done with a high-quality scan tool or by a local mechanic if needed.
Is this a new or used part?
This is a high-quality, inspected, and tested OEM part that has been professionally prepared for resale. Each module is verified to be fully functional before being programmed with fresh GM software and shipped to you.
How do I provide my VIN?
After you complete your purchase, you can send us a message with your vehicle’s VIN. We cannot program and ship the module without it, so please provide it promptly to avoid delays.
Will this fix my check engine light?
If the check engine light is caused by an internal failure of the ECM (common codes include P0601, P0606, U0100), then yes, this will resolve the issue. However, you must ensure that any other vehicle faults (e.g., bad sensors, wiring issues) have been properly diagnosed and repaired first.