OEM Engine Control Module (ECM) for 2019-2025 Buick, Cadillac, Chevrolet, & GMC

• What to Look For: Check for physical damage like cracks or corrosion. Make sure the part is clean and the connectors are in good shape.

• Quality Indicators: For used parts, look for ones that have been tested and inspected. Ask about a warranty. For new aftermarket parts, choose reputable brands.

• What's Included: Typically, you'll receive just the module itself. You may need to have it programmed to your specific vehicle.

• Difficulty Level: Medium. Estimated time: 1-2 hours.

• Special Tools: You'll need basic hand tools and possibly a scan tool to clear any codes after installation. Some modules require programming with specialized equipment.

• Critical Steps and Tips:

1. Disconnect the battery before starting.
2. Locate the module (usually under the hood or dash).
3. Disconnect the wiring harness.
4. Remove the old module.
5. Install the new module.
6. Reconnect the wiring harness.
7. Reconnect the battery.
8. Program the module if necessary.

• DIY or Professional: Replacing the module itself is often DIY-able. However, programming often requires professional equipment. If you're not comfortable with electrical work or programming, it's best to have a professional install it.

• Used OEM: These are genuine factory parts that have been tested and inspected. They offer a good balance of quality and price.

• New Aftermarket: These are brand new parts made by third-party companies. They are built to meet or exceed OE specifications.

• Related Parts: Check the wiring harness and connectors for damage. Also, consider replacing any sensors that are known to cause problems with the engine control system.

• Preventing Repeat Failures: Replacing related parts can prevent repeat failures by addressing the root cause of the problem. For example, a faulty sensor can damage the module over time.

• How Long It Lasts: This part can last for 10 years or more under normal conditions.

• Factors Affecting Longevity: Extreme temperatures, moisture, and electrical problems can shorten its lifespan. Regular vehicle maintenance can help extend its life.

• Budget: Used OEM - $150 - $300
• Mid-Range: New Aftermarket - $250 - $450
• Premium: New Aftermarket (High-End Brand) - $400 - $600

• Labor Cost: Labor costs can range from $100 to $300, depending on the shop and the complexity of the job. Programming can add to the cost.

• Total Job Cost: Expect to pay between $250 and $900 for the entire job, including the part and labor.

• Known Issues: Some vehicles may experience issues with the module due to voltage fluctuations or sensor failures. Check for any Technical Service Bulletins (TSBs) related to this part and your specific vehicle. Some owners have reported issues with rough idling or misfires that were resolved by replacing this module.

• Confirming Proper Operation: After installation, start the engine and let it idle. Check for any warning lights on the dashboard.

• What to Look/Listen For: Make sure the engine runs smoothly and responds correctly to the accelerator. Take the vehicle for a test drive to ensure it shifts properly and performs as expected. If you had to program the module, verify that all systems are functioning correctly.

• Q: Will this module work with my specific vehicle?
• A: This module is designed for certain Buick, Chevrolet, and GMC models from 2020-2025. Check your vehicle's specifications to confirm compatibility.

• Q: Do I need to program this module after installation?
• A: It depends. Some modules require programming to match your vehicle's specific settings. Check with a mechanic or the part supplier to see if programming is necessary.

• Q: What happens if I install the module incorrectly?
• A: Installing the module incorrectly can damage the module or your vehicle's electrical system. It's important to follow the installation instructions carefully or have a professional install it.

• Q: How do I know if my module is bad?
• A: Common signs of a bad module include a check engine light, trouble starting, stalling, and poor engine performance. A mechanic can diagnose the problem using a scan tool.

• Q: What is the warranty on this part?
• A: The warranty varies depending on whether you buy a used OEM or new aftermarket part. Used parts typically have a shorter warranty than new parts. Check with the seller for specific warranty information.

OEM Part Numbers:

• GM: 12680194, 12691559, 12693292, 12696017, 12697426, 12702989, 12703776, 12709219, 12711695, 12719250, 12721667, 12739544

Fits Years: 2019 2020 2021 2022 2023 2024 2025