Restore Peak Performance to Your GM Vehicle
Is your 2010-2011 Cadillac CTS, Buick LaCrosse, or Chevy Traverse running rough? Experiencing frustrating issues like random stalling, poor fuel economy, or a persistent Check Engine Light? In my 20+ years of automotive diagnostics, I’ve seen these symptoms countless times, and they often point directly to a failing Engine Control Module (ECM). The ECM is the brain of your engine, and when it malfunctions, it can cause a cascade of problems that are difficult to diagnose. This isn’t just an inconvenience; a faulty ECM can affect vehicle safety and reliability.
This replacement Engine Control Module, part number 19300015, is the definitive solution. We take the guesswork and high dealership costs out of the equation. Each module is professionally programmed with the latest GM software updates specifically for your vehicle. All we need is your Vehicle Identification Number (VIN) at checkout. This ensures that when the part arrives, it’s ready to integrate with your vehicle’s systems, restoring the precise fuel delivery, ignition timing, and emissions control your engine was designed for.
Case Study: A Tricky Diagnosis
A customer brought in a 2011 Cadillac CTS 3.6L with an intermittent no-start condition and random misfires that no one could pin down. They had already replaced spark plugs and coils. After connecting my scan tool, I found communication loss codes (U-codes) with the ECM, along with a history code P0601 (Internal Control Module Memory Check Sum Error). These are classic signs of an ECM on its last legs. We installed one of our pre-programmed modules, performed the security relearn, and the car ran perfectly. It’s a prime example of how the right part, correctly prepared, can solve a problem that seems impossibly complex.
Common Signs of a Failing Engine Computer
A failing ECM can manifest in various ways. If you’re noticing any of the following, it might be time for a replacement. A proper diagnosis is always recommended, but these are strong indicators:
- ✔ Unexplained Check Engine Light (CEL) illumination.
- ✔ Stalling, hesitation, or rough idling.
- ✔ Noticeable decrease in fuel efficiency.
- ✔ Engine misfires or performance issues.
- ✔ Vehicle won’t start, despite a good battery and starter.
- ✔ Diagnostic Trouble Codes (DTCs) like P0601, P0606, or U0100.
- ✔ Problems with automatic transmission shifting.
A Straightforward Guide to Installation
Replacing the 2010-2011 CTS ECM is a task a confident DIYer can handle. The key is our pre-programming service, which eliminates the need for expensive dealer-specific tools. For most compatible vehicles, a simple security relearn procedure is all that’s needed after installation.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before beginning any electrical work.
- Locate the ECM: On the CTS, the ECM is typically found in the engine compartment on the right-hand (passenger) side. For other models, it may be behind the fan shroud. Consult a repair manual for your specific vehicle if you’re unsure.
- 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, pre-programmed ECM into place. Reconnect the electrical connectors, ensuring they click securely into position.
- Reconnect Battery: Re-attach the negative battery terminal.
- Perform Security Relearn: This final step syncs the new ECM with your vehicle’s anti-theft system. The procedure is typically: Turn the key to the ‘ON’ position for 10-15 minutes, then ‘OFF’ for 10 seconds. Repeat this cycle 3 times. The vehicle should then start.
Important Note for Camaro & LaCrosse Owners: Due to the specific immobilizer systems in the 2010-2011 Camaro and LaCrosse, a true plug-and-play installation requires us to transfer security data from your original module. After your purchase, we will contact you with simple instructions for sending your old ECM to us for this data transfer service. This ensures a seamless installation without any extra steps on your end.
Verified Vehicle Compatibility
This module is a direct replacement for part numbers 19300015, 19300014, 12617230, 12636355, and 12635019. It is guaranteed to fit the following vehicles equipped with the 3.6L V6 engine:
- 2010-2011 Cadillac CTS
- 2010-2011 Cadillac STS
- 2010-2011 Buick LaCrosse
- 2010 Buick Allure
- 2010-2011 Chevrolet Camaro
- 2010-2011 Chevrolet Traverse
- 2010-2011 GMC Acadia
- 2010-2011 Buick Enclave
- 2010 Saturn Outlook
Frequently Asked Questions
Do I need to have this ECM programmed?
No. We handle all the programming for you before shipment. Simply provide your vehicle’s 17-digit VIN during checkout, and it will arrive ready for installation and a security relearn procedure.
What is the special process for a Camaro or LaCrosse?
For these two models, we need to read the immobilizer data from your original ECM to make the new one plug-and-play. After you order, we’ll provide instructions for sending your old module to us. This service is included in the price.
Where is the ECM located on my 2011 CTS?
On the 2010-2011 Cadillac CTS, the Engine Control Module is located in the engine bay, on the passenger side (RH side) of the vehicle, near the front.
Is this a used part?
This is a high-quality, tested, and verified component. Each unit is inspected and programmed with the latest GM software to ensure it meets or exceeds original factory performance standards.
What if I install it and my car still doesn’t start?
First, ensure you have successfully completed the security relearn procedure (3 cycles of key-on for 10-15 mins). If it still fails to start, double-check all connections. While this ECM will fix module-related failures, it’s important to have properly diagnosed the issue, as other problems (like a bad fuel pump or crank sensor) can cause similar symptoms.