Restore Your Vehicle’s Performance and Reliability
Is your Buick Lucerne, or another compatible GM vehicle, suffering from erratic engine behavior, poor fuel economy, or a persistent Check Engine Light? These are classic signs of a failing Engine Control Module (ECM), the central computer that governs your engine’s most critical functions. This replacement Engine Control Module, part number 12607096, is the definitive solution to restore your vehicle’s factory performance, drivability, and efficiency. It serves as the brain of your engine, precisely managing fuel injection, ignition timing, emissions systems, and transmission shifting to ensure a smooth and powerful ride.
When the ECM begins to fail, it can create a cascade of frustrating and potentially damaging issues. You might experience unexplained stalling, rough idling, hesitation during acceleration, or even a complete no-start condition. Don’t let a faulty computer keep you off the road. This module is a direct-fit replacement, engineered to meet or exceed original equipment specifications for a wide array of GM cars, trucks, and SUVs.
The Importance of VIN Programming
Unlike a generic, off-the-shelf part, this ECM is specifically programmed to your vehicle’s unique Vehicle Identification Number (VIN) before it ships. This critical step ensures seamless integration with your vehicle’s existing systems, including the anti-theft system (PassLock/VATS), transmission, and other onboard modules. By flashing the unit with the latest GM-certified software updates, we eliminate the need for an expensive trip to the dealership for programming. This service guarantees that your new ECM works correctly right out of the box, matching all the specific options and calibrations your vehicle was built with.
From the Diagnostic Bay
We once had a 2008 Chevy Trailblazer come in with a classic case of what the owner thought was a bad ECM. The truck would run fine for 15 minutes, then suddenly stall and refuse to restart for an hour. He had already replaced the fuel pump and crank sensor. After running diagnostics, we found that the ECM was losing communication, but not due to internal failure. A corroded ground wire on the engine block was causing intermittent voltage drops, tricking the computer into shutting down. After cleaning and securing the ground, the truck ran perfectly. It’s a powerful reminder: before condemning the ECM, always check your battery connections and primary engine grounds. A simple fix can save you hundreds.
Diagnosing Your Failing 2006 Lucerne ECM
A failing engine computer can manifest in numerous ways, often mimicking other component failures. If you’re experiencing any of the following issues, your ECM could be the culprit. Proper diagnosis is key, but these symptoms are strongly indicative of a module problem.
- ✔ Check Engine Light: The light is on, and you may have codes related to module communication, sensor reference voltage, or processor faults.
- ✔ Engine Stalling or Misfiring: The engine may stall unexpectedly, run rough, or misfire on one or more cylinders.
- ✔ No-Start Condition: The engine cranks but refuses to start, often due to a lack of spark or fuel injector pulse.
- ✔ Poor Fuel Economy: A sudden and significant drop in gas mileage can be caused by the ECM failing to properly regulate the air-fuel mixture.
- ✔ Transmission Shifting Problems: The ECM works with the Transmission Control Module (TCM) to ensure smooth shifts. A faulty ECM can cause harsh shifting, delayed engagement, or getting stuck in one gear.
- ✔ Intermittent Issues: Problems that appear and disappear, often worsening as the engine heats up, are a hallmark of failing electronic components inside the ECM.
Guaranteed Compatibility and Simple Installation
This module is a direct replacement for a range of GM service numbers, including 12590032, 12602044, 12603530, 12605843, 12607096, 12630457, and 19210737. It fits a vast selection of vehicles beyond the 2006 Buick Lucerne, such as the Cadillac DTS, Chevy Impala, Pontiac G6, and GMC Envoy. Once you receive your VIN-programmed module, installation is straightforward. Simply disconnect the battery, locate and remove your old ECM, install the new one, and reconnect the battery. In some cases, a security relearn procedure may be necessary, which can typically be done without special tools. Restore your vehicle with confidence and get back on the road quickly.
Frequently Asked Questions
What is an ECM and what does it do?
The Engine Control Module (ECM) is your vehicle’s main computer. It controls the engine’s performance by monitoring sensors and adjusting outputs like fuel injector pulse width and ignition timing to ensure optimal power, efficiency, and emissions.
Why is providing my VIN so important?
Your Vehicle Identification Number (VIN) contains critical information about your car’s specific engine, transmission, and options. We use the VIN to load the exact factory software and calibrations onto the ECM, ensuring it communicates perfectly with your vehicle’s other systems, including the anti-theft system.
Is this part difficult to install?
For most DIY mechanics, the installation is straightforward. It typically involves disconnecting the vehicle’s battery, unplugging the electrical connectors from the old ECM, unbolting it, and then installing the new one in reverse order. No complex programming is needed on your end because we handle it before shipping.
Will this fix my check engine light?
If the check engine light is caused by an internal failure of your original ECM, then yes, this replacement module will solve the problem. However, it’s crucial to ensure the codes are not being caused by a faulty sensor or wiring issue before replacing the module.
How do I know if this ECM fits my vehicle?
This ECM replaces several part numbers, including 12607096, 12590032, and 12603530. Please review the detailed fitment list on this page. If your vehicle and original part number are listed, this is the correct part for you. Providing your VIN at checkout guarantees compatibility.