Restore Peak Performance to Your Cadillac ELR
Is your 2014-2016 Cadillac ELR suffering from perplexing issues like a persistent check engine light, rough idling, stalling, or a frustrating no-start condition? These are classic signs of a failing Engine Control Module (ECM). The ECM is the brain of your vehicle, managing everything from fuel injection and ignition timing to emissions control and transmission shifting. When it falters, the entire vehicle’s performance and reliability are compromised. Don’t let a faulty computer keep your advanced hybrid off the road. This direct-fit, VIN-programmed ECM is the definitive solution to get your vehicle running like new again.
From the Diagnostic Bay
We had a 2015 Volt (which shares a similar powertrain with the ELR) come into the shop with an intermittent stalling problem that was driving the owner crazy. No specific codes were being stored consistently, just a few random communication errors. After checking all the major sensors and wiring, we suspected the ECM was failing internally, likely due to heat cycles. Instead of a costly and time-consuming diagnostic path, we installed one of our VIN-programmed modules. The car started immediately, the idle smoothed out, and the stalling issue was completely gone. The customer was back on the road the same day, having avoided hundreds in dealership programming fees and diagnostic labor.
Diagnosing Your 2014-2016 ELR Engine Module
A failing engine computer can manifest in numerous ways, often mimicking other sensor or component failures. If you’re experiencing a combination of the symptoms below, it’s highly probable that your ECM is the culprit. This module is the central command unit, and its failure can create a cascade of problems that are difficult to trace without replacing the core component.
Symptoms of a Faulty ECM
- ✔ Persistent Check Engine Light (CEL) that won’t clear
- ✔ Engine stalling or shutting off while driving
- ✔ Difficulty or inability to start the engine
- ✔ Noticeable decrease in fuel economy
- ✔ Rough or erratic engine idling
- ✔ Hesitation or stumbling during acceleration
- ✔ Transmission shifting problems or harsh shifts
- ✔ Communication error codes with other vehicle modules
The Plug-and-Play Solution
The biggest hurdle in replacing an ECM has always been the expensive and inconvenient programming required at a dealership. We eliminate that step entirely. When you order from us, you provide your vehicle’s VIN, and we flash the module with the latest, most stable software updates directly from GM. This ensures perfect compatibility and optimal performance for your specific vehicle configuration. Your new 2014-2016 ELR Engine Module will arrive at your door ready for a straightforward installation. In most cases, it’s as simple as disconnecting the battery, swapping the old module for the new one, and reconnecting the battery. A simple security relearn procedure may be required, which can typically be done without any special tools.
Broad Compatibility Across the GM Lineup
While this is a perfect fit for the Cadillac ELR, this versatile ECM, part number 12670335, is also the correct component for a wide range of other GM vehicles. It directly replaces the following part numbers:
- 12668866
- 12668994
- 12643636
- 12663405
- 22819494
- 12692200
It fits models such as the Chevrolet Cruze, Sonic, Trax, Spark, Volt, Express vans, and Silverado/Sierra trucks. Please verify the part number to ensure a perfect match for your vehicle.
Frequently Asked Questions
Do I need to program this module?
No. This module comes fully programmed to your vehicle’s specific VIN. Simply provide us with your VIN during or after checkout, and we will handle all the software flashing before it ships. It’s ready to install right out of the box.
Where is the ECM located on my 2014-2016 Cadillac ELR?
On the 2014-2016 Cadillac ELR, the Engine Control Module is located in the left-hand (driver’s side) rear of the engine compartment.
What is the difference between an ECM and a PCM?
The terms are often used interchangeably. An ECM (Engine Control Module) specifically manages engine functions. A PCM (Powertrain Control Module) is a more integrated unit that controls both the engine and the transmission. For this application, the terms refer to the same part.
Will this fix my check engine light?
If the check engine light and associated diagnostic trouble codes (DTCs) are a result of a faulty ECM, then yes, this part will resolve the issue. It’s always recommended to have your vehicle scanned to identify the codes before ordering to confirm the diagnosis.
What is the process after I order?
After you place your order, you will need to send us your vehicle’s 17-digit VIN. Once we receive your VIN, our technicians will program the module with the latest GM software specific to your car. The module will then be securely packaged and shipped to you.
Is any special ‘relearn’ procedure required after installation?
In some cases, a simple security relearn or Crankshaft Variation (CASE) relearn might be necessary. The security relearn can often be done by cycling the key in the ignition. A CASE relearn may require a scan tool, but is not always needed for the vehicle to run properly.