Is Your Vehicle Running Rough? The Engine Control Module Could Be the Culprit.
The Engine Control Module (ECM), often called the engine’s brain, is the central command center for your vehicle’s performance, fuel economy, and emissions. It processes data from a network of sensors to manage critical functions like fuel injection, ignition timing, and transmission shifting. When the ECM begins to fail, it can cause a cascade of confusing and frustrating problems, from a simple check engine light to a vehicle that won’t start at all. If you’re experiencing erratic engine behavior, stalling, or poor fuel efficiency in your 2006 Cadillac XLR or other compatible GM vehicle, a faulty ECM is a likely suspect.
From the Diagnostic Bay
We had a 2008 Chevy Impala come into the shop with an intermittent stalling issue that was driving the owner crazy. It would die at stoplights without warning, but then start right back up. No consistent codes were being stored, just a few random communication errors. After checking all the usual suspects—fuel pump, crank sensor, and wiring harnesses—we hooked up a scope to the ECM’s power and ground circuits. We found that the ECM’s internal voltage regulator was failing under heat soak, causing it to momentarily shut down. Replacing it with a properly programmed module like this one solved the problem instantly. It’s a reminder that sometimes the most baffling issues trace back to the vehicle’s central computer.
Restore Peak Performance with a 2006 XLR Engine Control Module
Don’t let a failing computer keep you off the road. This replacement Engine Control Module, service number 12607096, is the definitive solution to restore your vehicle’s factory performance and reliability. We take the guesswork and hassle out of the repair process. Unlike a generic module from a parts store or salvage yard, this unit is professionally programmed specifically for your vehicle using your unique Vehicle Identification Number (VIN). This ensures that all software, including the latest updates from GM, is perfectly matched to your car’s engine, transmission, and options. The result is a seamless, plug-and-play installation that gets you back on the road quickly and confidently.
Common Symptoms of a Failing ECM:
- ✔ Check Engine Light is on with various or no specific codes.
- ✔ Engine stalls, stumbles, or misfires for no apparent reason.
- ✔ Noticeable decrease in fuel economy.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ The engine cranks but refuses to start.
- ✔ Communication issues with diagnostic scan tools.
- ✔ Failure to pass emissions testing.
VIN-Matched Programming: The Key to a Successful Repair
Modern vehicles are complex, and the ECM is tied into multiple systems, including the anti-theft (immobilizer) system. Simply swapping a module from another vehicle will not work and will likely result in a no-start condition. Our process eliminates this problem. When you purchase, you provide us with your VIN. Our technicians then use official GM equipment to load the correct software and calibrations onto the module. This ensures it communicates perfectly with all other modules in your vehicle, just as it did from the factory. This part is a direct replacement for multiple service numbers, including 12590032, 12602044, 12603530, 12605843, 12630457, and 19210737, offering broad compatibility across a wide range of GM cars, trucks, and SUVs. Please verify your vehicle in the fitment list below to ensure proper application.
Frequently Asked Questions
Do I need to do any programming or flashing myself?
No. This ECM comes fully programmed to your vehicle’s VIN with the latest GM software updates. It is ready for installation right out of the box.
What information do you need from me?
After you complete your purchase, you will need to provide us with your 17-digit Vehicle Identification Number (VIN). This is essential for us to program the module correctly for your specific vehicle.
Is this a simple plug-and-play installation?
Yes, for most vehicles. Once programmed to your VIN, the module is plug-and-play. However, some GM vehicles may require a simple, key-on/key-off security relearn procedure that you can do yourself in about 10-15 minutes. Instructions can be provided if necessary.
How can I be sure my old ECM is the problem?
The symptoms listed above are strong indicators of ECM failure. However, we always recommend a proper diagnosis by a qualified technician to rule out other potential issues like faulty sensors, wiring problems, or fuel delivery issues before ordering.
Will this part fit vehicles other than the 2006 Cadillac XLR?
Yes. This ECM is compatible with a very wide range of GM vehicles from roughly 2005 to 2010. Please refer to the detailed compatibility list on this page to confirm it fits your specific make, model, and year.