Restore Peak Performance to Your 2009 Cadillac CTS
Is your Cadillac CTS or other GM vehicle suffering from perplexing electrical issues, a persistent check engine light, or poor engine performance? A failing Engine Control Module (ECM) is often the culprit behind these frustrating problems. The ECM is the central computer of your vehicle, responsible for managing everything from fuel injection and ignition timing to emissions controls and transmission shifting. When it fails, it can cause a cascade of issues that can be difficult to diagnose. This genuine GM Engine Control Module, part number 12630464, is the definitive solution to restore your vehicle’s factory performance and reliability.
From the Diagnostic Bay
We had a 2009 Cadillac CTS 6.2L come into the shop with a complaint of intermittent stalling and a flashing check engine light. The owner had already replaced the spark plugs and an oxygen sensor with no luck. Our initial scan showed multiple communication error codes with other modules. Instead of chasing electrical ghosts, we went straight to the source. After verifying power and ground to the ECM, we identified the module itself as the weak link. A replacement ECM, programmed specifically to the car’s VIN, solved all the issues on the first try. The key wasn’t just replacing the part, but ensuring it had the correct, updated software for that specific vehicle—a step we handle for you before it even ships.
Is Your Vehicle Showing Signs of ECM Failure?
A faulty engine computer can manifest in numerous ways. If you’re experiencing any of the following, it might be time to replace your ECM:
- ✔ Persistent Check Engine Light (CEL) that won’t clear or returns with various codes.
- ✔ Engine stalling, stumbling, or hesitating during acceleration.
- ✔ Noticeable decrease in fuel economy.
- ✔ Difficulty starting the engine or a complete no-start condition.
- ✔ Transmission shifting erratically or getting stuck in gear.
- ✔ Communication errors with diagnostic scan tools.
- ✔ Other warning lights on the dashboard, such as traction control or ABS, illuminating without a clear cause.
The Plug-and-Play Solution for Your 2009 CTS Engine Module
Don’t waste time and money at a dealership with expensive diagnostics and programming fees. We simplify the repair process. This module isn’t just a part in a box; it’s a complete solution. When you order, simply provide us with your vehicle’s 17-digit Vehicle Identification Number (VIN). Our technicians will then program the module with the latest, most stable software updates directly from GM. This ensures that the computer is perfectly matched to your vehicle’s specific configuration, including its engine, transmission, and factory options. The result is a simple, direct-fit replacement that, in most cases, requires no additional programming. It arrives at your door ready for installation.
Guaranteed Compatibility
This ECM, identified by service number 12630464, is a direct replacement for a wide range of GM vehicles. It is fully interchangeable with the following service numbers, ensuring a perfect match for your application:
12636659, 12639300, 1263605, 12628993, 12628911, 12625453, 12622175, and 12678512.
It fits a variety of models beyond the Cadillac CTS, including the Corvette, Hummer H3, Chevy Colorado, GMC Canyon, Buick Lucerne, and more. Please verify the fitment list to confirm compatibility with your exact make, model, and engine option.
Frequently Asked Questions
Do I need to have this module programmed?
No. We handle all the programming for you before shipment. Simply provide your vehicle’s VIN during checkout, and the module will arrive ready to install with the latest GM software updates for your specific vehicle.
What is a VIN and where do I find it?
The VIN is your vehicle’s unique 17-digit identification number. You can typically find it on a small plate on the driver’s side of the dashboard (visible through the windshield), on the driver’s side door jamb sticker, or on your vehicle’s registration and insurance documents.
Will this fix my check engine light?
If the check engine light is caused by a faulty ECM, then yes, this part will resolve the issue. However, it’s crucial to ensure that the underlying cause of any diagnostic trouble codes (like a bad sensor) has been addressed first. A new ECM cannot fix a separate mechanical or electrical problem.
Is any special procedure needed after installation?
While the module is plug-and-play, some GM vehicles may require a security relearn or Crankshaft Variation (CASE) relearn procedure after installation. These procedures are straightforward and can often be performed without special tools. Instructions can be readily found online for your specific model.
How can I be sure this is the correct part for my vehicle?
The best way is to match the service number from your existing module to one of the numbers listed in this description (12630464, 12636659, etc.). Additionally, providing us with your VIN ensures we program and send the correct, compatible hardware for your vehicle.