Restore Your Cadillac’s Core Performance and Reliability
Is your 2010-2012 Cadillac CTS experiencing frustrating issues like stalling, erratic engine behavior, a persistent Check Engine Light, or even a no-start condition? As a technician with over two decades of experience, I’ve seen these symptoms countless times, and they often point directly to a failing Engine Control Module (ECM). The ECM is the central computer of your vehicle, managing everything from fuel injection and ignition timing to transmission shifting. When it falters, the entire vehicle’s performance suffers. This isn’t just an inconvenience; it’s a critical component for your car’s health and your safety on the road.
We offer a dependable and straightforward solution: a replacement 2010-2012 CTS Engine Control Module, professionally programmed with the latest GM-certified software specifically for your vehicle. Simply provide us with your Vehicle Identification Number (VIN) after purchase, and we handle the complex programming before it even ships. This means no expensive trips to the dealership for flashing, no special scan tools required—just a direct-fit part that’s ready to restore your engine’s proper function right out of the box.
A Technician’s Notebook: The Intermittent Gremlin
A customer brought in a 2011 CTS with a complaint that drove them crazy: it would run perfectly for days, then suddenly start stumbling at idle and shifting harshly for an hour before returning to normal. There were no consistent trouble codes, just a history of random communication faults (U-codes). After checking all the usual suspects—wiring, grounds, sensors—we focused on the ECM. On the surface, it seemed fine. But under load and at temperature, the internal processor was failing intermittently. We installed one of our pre-programmed modules, and the problem vanished instantly. It’s a classic case where the ECM itself is the hidden gremlin, and a reliable, correctly programmed replacement is the only true fix.
Is Your Cadillac Showing These Symptoms?
A failing ECM can manifest in numerous ways. If you’re experiencing any of the following, it’s a strong indicator that your engine’s computer may need replacement:
- ✔ Check Engine Light is illuminated with codes like P0601, P0606 (Internal Control Module Processor Error), or U0100 (Lost Communication With ECM).
- ✔ The engine cranks but refuses to start.
- ✔ Noticeable decrease in fuel economy.
- ✔ The engine stalls, stumbles, or misfires unpredictably.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Cooling fans run constantly or not at all.
- ✔ Other warning lights (ABS, Traction Control) appear on the dash due to communication errors.
A Straightforward Guide to Installation
Installing your new 2010-2012 CTS Engine Control Module is a manageable job for a DIY enthusiast. Follow these general steps to get your car back in top shape. The ECM is typically located in the right-hand front of the engine compartment.
- Safety First: Always 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 CTS, it’s found in the RH front of the engine bay. You may need to remove a cover for access.
- Disconnect Connectors: Carefully release the locking tabs on the electrical wiring harnesses and pull them straight out from the module. Never force them. Inspect the connectors for any corrosion or damage.
- Remove the Old Module: Unbolt the old ECM from its mounting bracket. It’s typically held in by a few bolts or nuts.
- Install the New Module: Mount your new, pre-programmed ECM onto the bracket and secure it.
- Reconnect Everything: Firmly plug the wiring harnesses back into the new module until they click into place. Reconnect the negative battery terminal.
- Perform Security Relearn: After installation, you may need to perform a simple security relearn procedure (often called a ‘key-on’ procedure) to sync the new ECM with your vehicle’s anti-theft system. This typically involves turning the key to the ‘ON’ position for 10-15 minutes. Consult your owner’s manual or look online for the specific procedure for your model.
Verified Vehicle Compatibility
This module is a direct replacement for part number 12616889 and other superseded numbers. It is guaranteed to fit the following vehicles and configurations. Please match your vehicle, year, and engine to the list below.
CTS 2010-2012 (3.0L)
CTS 2012 (3.6L) – ID 12616889, 12630908, 12637106, 12642665, 12650256
SRX 2010-2011 (3.0L)
Buick:
Allure 2010 (2.4L, 3.0L)
LaCrosse 2010 (3.0L)
LaCrosse 2010-2011 (2.4L)
Regal 2011
Chevrolet:
Camaro 2012 (3.6L) – ID 12637106, 12642665, 12650256
Captiva Sport 2012 – ID 12616889, 12630908, 12637106, 12642665, 12650256
Equinox 2010-2011
Impala 2012 – ID 12616889, 12630908, 12637106, 12642665, 12650256
Orlando 2012-2013 – ID 12616889, 12630908, 12637106, 12642665, 12650256, 12651993
GMC:
Terrain 2010-2011
Saab:
9-5 2010-2011 (2.0L) – ID 12642665
This ECM also replaces part numbers: 12630908, 12637106, 12642665, 12650256, 12651993.
Frequently Asked Questions
Frequently Asked Questions
What information do you need to program the ECM?
After you complete your purchase, we require your 17-digit Vehicle Identification Number (VIN). This allows us to load the exact, correct GM software for your car’s specific options and configuration.
Is this a plug-and-play part?
Yes, it is. Because we program it to your VIN before shipping, it arrives ready to be installed without the need for additional programming. You may need to perform a simple security relearn procedure after installation, which takes about 10-15 minutes and requires no special tools.
Will this fix my specific problem?
This module will correct issues directly caused by a faulty ECM. While the symptoms listed above are common indicators, it’s always best to have a proper diagnosis performed to rule out other potential causes like bad sensors or wiring issues.
Where do I find my original part number?
The part number is printed on a sticker on the case of your current ECM. However, since this part supersedes many older numbers, as long as your vehicle is on our compatibility list, this module will work, even if the number doesn’t match exactly.
Is there a warranty?
Yes, all our modules come with a warranty that covers any defects in the part itself. We stand behind the quality and programming of our products to ensure you have a reliable, long-term solution.