Restore Peak Performance to Your GM Vehicle
Is your Cadillac STS, Buick LaCrosse, or Chevy Traverse suddenly stalling, running rough, or refusing to start? A persistent check engine light and confusing diagnostic codes can be incredibly frustrating. As a technician with over two decades of experience, 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 disrupt everything from fuel delivery and ignition timing to transmission shifting. This isn’t just an annoyance; it’s a critical failure that compromises your vehicle’s reliability and safety.
We offer a straightforward, dependable solution. This genuine GM Engine Control Module, part number 19300015, arrives at your door fully programmed to your vehicle’s specific Vehicle Identification Number (VIN). We flash it with the latest, most stable software updates directly from GM. This means no expensive trips to the dealership for programming, no special scan tools required for installation, and no guesswork. You get a module that’s ready to restore your engine’s proper function right out of the box.
From the Diagnostic Bay: The Intermittent No-Start Nightmare
I remember a 2011 Buick Enclave that came into the shop on a tow truck. The owner was at his wit’s end. The vehicle would start and run perfectly for weeks, then suddenly refuse to start for a day. No crank, no start. He had already replaced the battery and checked the starter. When we hooked up the scanner, we found a U0100 code—Lost Communication with ECM. After checking the wiring and connectors for the fifth time, we tested the ECM’s power and ground feeds, which were solid. The intermittent nature of the problem screamed internal module failure. We installed a VIN-programmed ECM, and the problem never returned. It’s a classic example of how a failing 2010-2011 STS ECM or its equivalent can cause ghost-in-the-machine issues that are impossible to pin down without replacing the faulty unit.
Is Your GM Vehicle Exhibiting These ECM Failure Signs?
A faulty ECM can manifest in various ways. If you’re experiencing any of the following, this module is likely the solution you need:
- ✔ Persistent Check Engine Light (CEL)
- ✔ Engine stalling or shutting off while driving
- ✔ No-start or hard-starting conditions
- ✔ Noticeable decrease in fuel economy
- ✔ Rough or erratic engine idle
- ✔ Failed emissions test
- ✔ Communication-related Diagnostic Trouble Codes (DTCs) such as U0100, P0601, or P0606.
A Straightforward Guide to Installation
Installing your new ECM is a manageable task for a DIY enthusiast. Following these steps will ensure a smooth process. Always consult a service manual for your specific vehicle’s torque specs and procedures.
- Safety First: Disconnect the negative terminal from your vehicle’s battery and secure it away from the post to prevent accidental reconnection.
- Locate the ECM: The location varies by model (e.g., behind the fan shroud on a Traverse, on the right-hand side of the engine on an STS). Refer to the fitment list below for your vehicle’s location.
- Disconnect Connectors: Carefully release the locking tabs on the electrical connectors and pull them straight out from the module. Avoid pulling on the wires themselves.
- Remove the Old Module: Unbolt the old ECM from its mounting bracket. Keep the hardware, as you may need to reuse it.
- Install the New ECM: Mount your new, pre-programmed ECM in place and tighten the mounting bolts securely.
- Reconnect Everything: Plug the electrical connectors firmly back into the new module until they click. Reconnect the negative battery terminal.
- Final Step: In some cases, a security relearn procedure may be required, which typically involves cycling the key. However, for most vehicles, this module is designed to be plug-and-play. For Camaro and LaCrosse models, we handle the immobilizer data transfer beforehand to ensure a seamless start-up.
Verified Vehicle Compatibility for this 2010-2011 STS ECM
This module is a direct replacement for part numbers 19300015, 19300014, 12617230, 12636355, and 12635019. It is guaranteed to fit the following models equipped with the 3.6L V6 engine:
- ✔ 2010-2011 Cadillac STS (RH engine)
- ✔ 2010-2011 Cadillac CTS (RH front engine compartment)
- ✔ 2010-2011 Buick LaCrosse / Allure (LH engine compartment)
- ✔ 2010-2011 Chevrolet Camaro
- ✔ 2010-2011 Chevrolet Traverse (behind fan shroud)
- ✔ 2010-2011 GMC Acadia (behind fan shroud)
- ✔ 2010-2011 Buick Enclave (behind fan shroud)
- ✔ 2010 Saturn Outlook (behind fan shroud)
Important Note for Camaro & LaCrosse Owners: To ensure 100% plug-and-play functionality, we will need your original ECM to transfer the immobilizer security data. We will contact you with simple instructions after your purchase.
Frequently Asked Questions
What does ‘VIN Programmed’ mean?
It means we load the module with the specific software and calibrations for your exact vehicle using your VIN. This ensures all systems, from the engine to the transmission, operate correctly without requiring a trip to the dealer for programming.
Do I need to do anything after installing this ECM?
For most compatible vehicles, no further action is needed. The module is ready to go. In rare cases, a simple key-cycle security relearn might be necessary. We handle the complex immobilizer programming for Camaro and LaCrosse models before shipment.
Will this fix a P0601 ‘Internal Control Module Memory Check Sum Error’ code?
Yes. A P0601 code indicates a fatal internal error in the ECM itself. The only reliable fix is to replace the module. This pre-programmed ECM is the correct solution for that code.
What if I have a different part number on my old module?
This module is a direct supersession for several part numbers, including 19300014, 12617230, 12636355, and 12635019. As long as your vehicle is on the compatibility list, this part will work perfectly.
Why do you need my old ECM for a Camaro or LaCrosse?
These specific models have more complex anti-theft (immobilizer) systems. To make the new ECM truly plug-and-play and avoid a no-start condition, we must read the security information from your old module and write it to the new one. We provide a shipping label and clear instructions for this simple process.