Restore Your Camaro’s Brain and Get Back on the Road
Is your 2012-2015 Camaro suffering from frustrating issues like intermittent stalling, a persistent check engine light, or a complete no-start condition? As a technician with over two decades of experience under the hood, I’ve seen these exact symptoms countless times. Often, the root cause isn’t a sensor or a wire—it’s the Engine Control Module (ECM), the central computer that manages everything from fuel delivery and spark timing to transmission shifts. When it fails, your car’s performance and reliability go with it.
This isn’t just a replacement part; it’s a complete solution. We are providing a genuine GM Electronic Control Module, part number 12633264, that comes fully programmed to your vehicle’s specific Vehicle Identification Number (VIN). This critical step ensures seamless communication with all other onboard systems, eliminating the need for an expensive trip to the dealership for programming. By installing this 2012-2015 Camaro ECM, you’re restoring the factory-intended performance and clearing up those confusing diagnostic codes for good.
From the Diagnostic Bay: The Ghost in the Machine
I once had a 2013 Camaro ZL1 in my bay with an issue that was driving the owner crazy. It would start and run perfectly for weeks, then suddenly refuse to start, only to fire right up an hour later. No consistent codes, just a random no-crank. After hours of chasing wires and testing relays, we finally caught the ECM acting up on the scope. Internal board temperatures were causing a micro-fracture to open and close, breaking the circuit. Replacing the ECM with a correctly programmed unit like this one solved the problem instantly. It’s a perfect example of how a faulty computer can create phantom issues that seem impossible to trace.
Common Signs of a Failing Engine Computer
- ✔ Unexplained Check Engine Light (CEL) with codes like P0601, P0606, or U0100.
- ✔ Vehicle refuses to start or has a hard starting condition.
- ✔ Intermittent stalling or rough idling for no apparent reason.
- ✔ Noticeable decrease in fuel economy.
- ✔ Poor engine performance, hesitation, or misfires.
- ✔ Problems with the automatic transmission shifting erratically.
- ✔ Failure to pass state emissions testing.
A Straightforward Guide to Installation
- ✔ Safety First: Disconnect the negative terminal from your vehicle’s battery and wait at least 15 minutes for the system capacitors to discharge.
- ✔ Locate the ECM: On the 2012-2015 Camaro, the ECM is typically located in the engine bay. Consult your vehicle’s service manual for the precise location.
- ✔ Disconnect Connectors: Carefully unclip the wiring harness connectors from the old ECM. These connectors have locking tabs that must be released before pulling. Do not force them.
- ✔ Remove the Old Module: Unbolt the old ECM from its mounting bracket. Keep the mounting hardware as you will need it for the new module.
- ✔ Install the New ECM: Mount your new, pre-programmed 2012-2015 Camaro ECM using the original hardware. Ensure it is secure.
- ✔ Reconnect and Secure: Firmly plug the wiring harnesses into the new module until they click into place. Reconnect the negative battery terminal.
- ✔ Perform Relearn Procedure: You will need to perform a security relearn procedure (often called a Passlock or Passkey relearn). This typically involves turning the key to the ‘ON’ position for 10-15 minutes, then off, and repeating two more times. This allows the new ECM to sync with your vehicle’s anti-theft system.
Verified Fitment For These GM Vehicles
This ECM (part number 12633264, interchangeable with 12678513) is a direct-fit replacement for a wide range of GM vehicles. Please verify your specific application below:
- CAMARO 2012: Electronic Control Module; 3.6L or 6.2L, with ID 12633264
- CAMARO 2013-2015: Electronic Control Module; 6.2L, VIN P (8th digit, opt LSA)
- CANYON 2010-2012: Electronic Control Module; (RH firewall), 5.3L
- COLORADO 2010-2012: Electronic Control Module; (RH firewall), 5.3L
- CORVETTE 2010-2013: Electronic Control Module; (RH engine compartment), 6.2L, VIN R or VIN T (opt LS9)
- CTS 2010-2013: Electronic Control Module; (RH front engine compartment), 6.2L
- CTS 2014: Electronic Control Module; Coupe, Sedan, or SW, 6.2L
- CTS 2015: Electronic Control Module; Coupe
- HUMMER H3 2010: Electronic Control Module; (RH firewall), 5.3L
- MALIBU 2010-2012: Electronic Control Module; 3.6L
Frequently Asked Questions
How does the programming process work?
After you place your order, simply send us your vehicle’s 17-digit VIN. We use this number to access the latest GM-certified software and flash it directly onto the module. This ensures it’s a perfect match for your car’s specific configuration before we ship it.
Do I need any special tools to install this?
No special programming tools are required. Basic hand tools (like a socket set) for removing the old module are all you’ll need. The only post-installation procedure is the security relearn, which uses only your vehicle’s ignition key.
Is this a used part?
This is a high-quality, tested replacement part guaranteed to function correctly. It has been inspected and programmed with the newest software updates from GM to ensure reliability and peak performance.
Will this fix my check engine light?
If the check engine light is caused by an internal ECM failure (like code P0601), then yes, this part will resolve the issue. However, you should always ensure other potential causes (sensors, wiring) have been properly diagnosed first.
What is an interchangeable service number?
Automakers often supersede part numbers over time. This module, 12633264, is a direct replacement for service number 12678513. They are functionally identical, and this part will work perfectly in vehicles calling for either number.