Restore Peak Performance to Your Cadillac
Is your Cadillac STS running rough, displaying a persistent check engine light, or refusing to start? A failing Engine Control Module (ECM) can disrupt the sophisticated performance you expect from your vehicle, leading to frustrating and unpredictable driving experiences. This isn’t just an inconvenience; it’s a critical issue that affects fuel economy, emissions, and overall engine health. We offer the definitive solution: a professionally programmed 2009-2010 Cadillac STS ECM that restores your vehicle’s factory-spec operation and your peace of mind.
Common Symptoms & Your Solution
If you’re experiencing any of the following issues, a faulty ECM is the likely culprit. This module is the direct solution for symptoms such as:
- Persistent Check Engine Light (CEL)
- Engine stalling, stuttering, or misfiring
- No-start or difficult starting conditions
- Poor fuel economy and reduced power
- Erratic automatic transmission shifting
- Communication error codes (e.g., U0100) or internal processor failure codes (e.g., P0606)
Our programmed 2009-2010 Cadillac STS ECM arrives ready for a straightforward installation, eliminating the need for an expensive trip to the dealership for programming.
Features & Benefits
- โ VIN-Specific Programming: We flash the module with the latest GM software updates using your vehicle’s unique VIN. This ensures perfect compatibility and communication with your car’s other electronic systems.
- โ Plug & Play Installation: Because the programming is done beforehand, this unit is ready to install right out of the box. In most cases, no further setup is required.
- โ Restored Engine Efficiency: With updated software and correct parameters, your engine will regain its optimal fuel efficiency, power delivery, and smooth operation.
- โ Broad Compatibility: This ECM, service number 12639300, is a direct replacement for a wide range of GM part numbers, including 12636659, 12628993, 12625453, and more, across various models.
- โ Guaranteed Protection: This unit is backed by our one-year replacement warranty.
Expert Insight: The Critical Role of VIN Programming
A common mistake is installing a used, unprogrammed ECM from another vehicle. While it might look identical, it contains the wrong data for your car’s specific engine, transmission, and options. This inevitably leads to no-start conditions, system conflicts, and more error codes. Our process of programming the module to your specific VIN isn’t just a convenienceโit’s the essential step that guarantees the computer integrates seamlessly, just like the original, restoring the precise control that defines the Cadillac driving experience.
Guaranteed Fitment for Multiple GM Vehicles
While this is the ideal programmed 2009-2010 Cadillac STS ECM, this versatile module also fits a wide array of other GM vehicles. Please verify your specific model and part number from the list below:
- Cadillac: CTS (2009), DTS (2009-11), SRX (2009), STS (2009-10), XLR (2009)
- Chevrolet: Colorado (2009-12), Corvette (2009), Trailblazer (2009)
- GMC: Canyon (2009-12), Envoy (2009)
- Buick: Lucerne (2009-11)
- Hummer: H3 (2009-10)
- Saab: 9-7X (2009)
Frequently Asked Questions
How do I provide my VIN number?
After you complete your purchase, simply reply to your order confirmation email with your vehicle’s 17-digit VIN. We cannot program or ship the module without it.
Is any additional programming required after installation?
In most cases, no. This ECM is sent ready for installation. However, some vehicles may require a security relearn or crank position sensor relearn procedure, which can often be done without special tools. Instructions are widely available online for these simple procedures.
What if I have a different part number?
This ECM is interchangeable with several service numbers, including 12636659, 12639300, 1263605, 12628993, and others listed in the description. As long as your original part number is on our cross-reference list, this module will work perfectly once programmed to your VIN.
Is this a simple DIY job?
For someone with basic mechanical skills, replacing an ECM is typically straightforward. It usually involves disconnecting the battery, unplugging the electrical connectors, and unbolting the old module to swap in the new one. The exact location varies by model (e.g., LH frame rail on the STS).
Will this fix my check engine light?
If the check engine light and other symptoms are caused by a faulty ECM, this replacement part will resolve the issue. We always recommend having a professional mechanic diagnose the vehicle properly to confirm the ECM is the point of failure before ordering.