Is Your Cadillac Experiencing Engine Problems?
If your 2009 Cadillac XLR, or another compatible GM vehicle, is suffering from issues like erratic idling, stalling, poor fuel economy, or a persistent Check Engine Light, a failing Engine Control Module (ECM) could be the culprit. The ECM is the central computer, the ‘brain’ of your vehicle’s engine management system. It controls critical functions like fuel injection, ignition timing, and emissions systems. When it fails, the symptoms can range from minor annoyances to a complete no-start condition, leaving you stranded.
Don’t let a faulty computer dictate your vehicle’s reliability. This direct-fit Engine Control Module, part number 12628911, is the definitive solution to restore your engine’s performance and efficiency. We take the guesswork out of the repair by programming the module specifically for your vehicle using the VIN you provide at checkout. This ensures that it arrives with the latest GM software updates, ready for installation and a simple security relearn procedure.
From the Diagnostic Bay
We had a 2009 Cadillac STS come into the shop with a complaint of intermittent stalling and a P0606 code (ECM Processor Fault). The owner had already replaced the crankshaft and camshaft position sensors based on advice from a forum, but the problem persisted. After confirming power and ground to the module were solid, we knew the internal processor was failing. Instead of a costly trip to the dealer for a new unit and programming, we installed one of our VIN-programmed modules. After a quick key relearn procedure in the bay, the car started right up and ran perfectly. The customer saved hundreds of dollars and significant time, driving away with a vehicle that performed like new. It’s a classic case where targeting the root cause—the failing computer—is the only real fix.
Symptoms of a Failing Engine Control Module
- ✔ Persistent Check Engine Light (CEL) on your dashboard.
- ✔ Engine stalling or shutting off unexpectedly while driving.
- ✔ Difficulty starting the engine or a complete no-start condition.
- ✔ Noticeable decrease in fuel efficiency.
- ✔ Rough or erratic engine idling.
- ✔ Hesitation or stumbling during acceleration.
- ✔ Transmission shifting problems or harsh shifts.
- ✔ Communication errors with diagnostic scan tools.
The Right Solution: A Pre-Programmed 2009 XLR Engine Module
Replacing an ECM isn’t just about swapping hardware. The software is equally critical. Our process ensures a seamless repair. When you order this 2009 XLR Engine Module, you provide us with your vehicle’s 17-digit VIN. Our technicians then use that information to load the correct, factory-specified software and the latest updates from General Motors onto the module. This critical step ensures that the computer communicates perfectly with all other systems in your vehicle, from the transmission to the anti-lock brakes.
Once installed, you will need to perform a security relearn procedure (often called a key relearn). This simple process syncs the new module with your vehicle’s anti-theft system and keys. In many GM vehicles, this can be done without special tools and typically involves a sequence of turning the key in the ignition. This plug-and-play approach eliminates the need for expensive dealership programming or specialized scan tools, saving you time and money.
Compatible Part Numbers:
This module is a direct replacement for the following GM service numbers: 12636659, 12639300, 1263605, 12628993, 12628911, 12625453, 12622175, 12630464, and 12678512.
Verified Vehicle Fitment:
This module is confirmed to fit a wide range of GM vehicles. Please verify your specific model and engine option from the list below:
- CADILLAC CTS 2009 (6.2L)
- CADILLAC DTS 2009-2011
- CADILLAC SRX 2009 (4.6L)
- CADILLAC STS 2009 (4.4L, 4.6L)
- CADILLAC STS 2010 (4.6L)
- CADILLAC XLR 2009
- CHEVROLET COLORADO 2009-2012 (2.9L, 3.7L)
- CHEVROLET CORVETTE 2009 (ZR1)
- CHEVROLET TRAILBLAZER 2009 (6.0L)
- GMC CANYON 2009-2012 (2.9L, 3.7L)
- GMC ENVOY 2009 (5.3L)
- HUMMER H3 2009-2010 (3.7L)
- BUICK LUCERNE 2009-2011 (4.6L)
- SAAB 9-7X 2009
Frequently Asked Questions
Do I need to have this module programmed?
No. We handle the programming for you before shipment. Simply provide your vehicle’s VIN during checkout, and the module will arrive with the correct software for your specific vehicle.
What is a VIN and why do you need it?
The VIN (Vehicle Identification Number) is a unique 17-digit code for your car. It contains specific details about your vehicle’s make, model, engine, and factory options. We use this to load the exact software calibration from GM, ensuring perfect compatibility.
What is the security relearn procedure?
The security relearn, or key relearn, is a required step that syncs the new ECM to your car’s anti-theft system and keys. For most compatible GM vehicles, this can be done at home without any special tools. It typically involves a 10-30 minute process of cycling the ignition key. We can provide instructions for this simple procedure.
Is this a guaranteed fix for my vehicle’s problems?
This module will resolve issues directly caused by a faulty ECM. While the symptoms listed are common indicators of ECM failure, it’s crucial to have a proper diagnosis performed. Other issues, such as bad sensors or wiring problems, can sometimes mimic ECM failure.
How do I find my vehicle’s VIN?
Your VIN can be found on a metal plate on the driver’s side dashboard (visible through the windshield), on the driver’s side door jamb sticker, or on your vehicle’s registration and insurance documents.