Restore Peak Performance with a VIN-Programmed Engine Control Module

Is your Corvette, Silverado, or Tahoe plagued by a persistent Check Engine Light, rough idling, or frustrating stalling issues? As a technician with over two decades of experience under the hood, I’ve seen countless drivers chase symptoms when the real culprit is a failing Engine Control Module (ECM). This isn’t just a part; it’s the brain of your vehicle’s engine, and when it falters, everything from fuel economy to engine timing can suffer. This GM Engine Control Module 12612384 is the definitive, reliable solution to get your vehicle running like new again.

We take the guesswork and hassle out of the repair. Unlike getting a blank module from a parts store, this unit arrives at your door pre-programmed with the latest official GM software, tailored specifically to your vehicle’s VIN. This means no extra trip to the dealership for expensive flashing. It’s a direct-fit, plug-and-play solution designed to restore factory performance and clear those stubborn diagnostic trouble codes for good.

Common Signs of a Failing ECM

• ✔ Check Engine Light is on with codes like P0601, P0606 (Internal Control Module Processor Error).
• ✔ Engine cranks but refuses to start.
• ✔ Unexplained drop in fuel efficiency.
• ✔ Rough or unpredictable engine idling and stalling.
• ✔ Noticeable loss of power and poor acceleration.
• ✔ Transmission shifting issues or harsh shifts.
• ✔ Communication errors with diagnostic scan tools (U-codes like U0100).

A Straightforward Guide to Installation

1. ✔ Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait at least 15 minutes for the system capacitors to discharge.
2. ✔ Locate the ECM: On vehicles like the Corvette, it’s typically in the right-hand (passenger side) engine compartment. For trucks and SUVs (Silverado, Tahoe, Escalade), it’s often found under the battery tray on the driver’s side. For vans (Express, Savana), check the LH rear of the engine compartment. Always verify the location for your specific model.
3. ✔ Disconnect the Connectors: Carefully release the locking tabs on the wiring harness connectors and pull them straight out from the old module. Never force them. Inspect the pins for any corrosion or damage.
4. ✔ Remove the Old Module: Unbolt the old ECM from its mounting bracket. Keep the hardware as you will reuse it.
5. ✔ Install the New Module: Mount your new, pre-programmed ECM securely onto the bracket. Reconnect the wiring harnesses, making sure they click firmly into place and the locking tabs are engaged.
6. ✔ Reconnect the Battery: Reattach the negative battery terminal.
7. ✔ Perform Security Relearn: Your vehicle may require a security relearn procedure to recognize the new ECM. A common GM procedure is to turn the key to the ‘ON’ position for 10-15 minutes, then ‘OFF’ for 10 seconds, and repeat this cycle three times. The vehicle should then start. A crankshaft position sensor (CASE) relearn may also be required, which can be done with a capable scan tool.

Verified Vehicle Compatibility

This module is a direct replacement for part numbers 12612384, 12622141, and 12617568. It is guaranteed to fit the following models and configurations: