Restore Your Vehicle’s Performance and Reliability
Is your vehicle suffering from a persistent check engine light, erratic engine behavior, or a frustrating no-start condition? These are classic signs of a failing Engine Control Module (ECM). As the brain of your engine, a faulty ECM can cause a cascade of problems that are often misdiagnosed, costing you time and money on unnecessary parts. This replacement ECM, part number 12650256, is the definitive solution to get your car running smoothly again.
We take the guesswork and dealer expense out of the equation. Before this module ships, we program it with the latest GM-certified software, specifically matched to your vehicle’s VIN. This means it arrives at your door ready for a straightforward installation, with no need for expensive dealership programming or specialized tools.
Real-World Diagnostics: A Technician’s Experience
Expert Pro Tip: Before condemning your ECM, take a moment to inspect the main connector pins on the wiring harness side. I’ve seen countless vehicles in my shop where intermittent issues were caused by a single pin that had backed out slightly or had minor corrosion. A quick spray of electronics cleaner and ensuring the connector is fully seated can sometimes save you a lot of diagnostic headaches. It’s a 5-minute check that should always be part of the process.
Common Symptoms of a Failing ECM:
- โ Persistent Check Engine Light (CEL) with various communication or sensor codes.
- โ Engine stalling, stumbling, or misfiring.
- โ Complete no-start or intermittent starting problems.
- โ Noticeable decrease in fuel economy.
- โ Transmission shifting issues or failure to communicate with the TCM.
- โ Problems with other electronic systems tied to the ECM.
Plug-and-Play Installation: No Dealer Visit Required
Installing your pre-programmed 2010 Allure Engine Module is a direct process. While specific locations vary by model (e.g., LH engine compartment on an Equinox, air cleaner bracket on an Impala), the general steps are consistent.
- Safety First: Disconnect the negative battery terminal and wait 10-15 minutes for the system capacitors to discharge.
- Locate the ECM: Find the old module in your engine bay. It will have several large electrical connectors.
- Disconnect and Remove: Carefully unplug the wiring harness connectors. Then, unbolt the module from its mounting bracket.
- Install the New Module: Bolt the new ECM into place and securely reconnect the wiring harnesses. Ensure they click into place.
- Reconnect Battery: Reattach the negative battery terminal.
- Perform Relearn Procedure: You may need to perform a simple security or idle relearn procedure. This typically involves turning the key to the ‘ON’ position for 10-15 minutes. Consult your vehicle’s specific procedure for exact steps.
Guaranteed Compatibility
This ECM is a direct replacement for a wide range of GM vehicles. It is interchangeable with the following part numbers: 12616889, 12630908, 12637106, 12642665, 12650256, and 12651993. Please verify the part number on your original module to ensure a perfect match. This unit fits models like the Buick LaCrosse, Cadillac CTS & SRX, Chevy Camaro, Captiva Sport, Equinox, Impala, Orlando, GMC Terrain, and Saab 9-5. Refer to the detailed fitment list to confirm compatibility with your specific year, model, and engine option.