Restore Peak Performance to Your Cadillac XLR
Is your 2009 Cadillac XLR suffering from frustrating issues like a persistent check engine light, erratic engine behavior, stalling, or a complete no-start condition? These are classic signs of a failing Engine Control Module (ECM), the central computer that governs your vehicle’s engine performance, fuel economy, and emissions. A faulty ECM can turn your driving experience into a constant headache, leaving you stranded and facing expensive diagnostic fees. This replacement Engine Control Module, part number 12628993, is the definitive solution to restore your vehicle’s factory performance and reliability.
This isn’t just a replacement part; it’s a complete, ready-to-install solution. We take the guesswork and additional cost out of the repair by pre-programming the module specifically for your vehicle. When you place your order, simply provide us with your vehicle’s 17-digit VIN. Our technicians will then flash the unit with the latest, most stable GM-certified software updates for your exact vehicle configuration. This ensures seamless communication between the module and all other vehicle systems, right out of the box.
From the Diagnostic Bay
We once had a 2009 Cadillac STS (which uses a similar ECM) come into the shop with a complaint of harsh shifting and what the owner described as ‘transmission hesitation.’ They had already spent a significant amount at another shop replacing transmission solenoids, with no improvement. After hooking up our professional scan tool, we noticed erratic data PIDs coming from the engine sensors, but the sensors themselves tested fine. The real culprit was the ECM, which was sending corrupt data to the Transmission Control Module (TCM), causing the shifting problems. A new, correctly programmed ECM solved both the engine and transmission symptoms. It’s a powerful reminder that the ECM’s health is critical to the entire vehicle’s operation, not just the engine.
Symptoms of a Failing 2009 XLR Engine Module
If you’re experiencing any of the following issues, a failing ECM is a highly likely cause. Proper diagnosis is always recommended, but these symptoms are strongly correlated with engine computer failure.
- ✔ Persistent and illuminated Check Engine Light (CEL)
- ✔ Engine stalling or cutting out unexpectedly while driving
- ✔ Difficulty starting the engine or a complete no-start condition
- ✔ Noticeable decrease in fuel efficiency
- ✔ Rough idling or engine misfires
- ✔ Poor acceleration and loss of power
- ✔ Communication errors with diagnostic scan tools
- ✔ Seemingly unrelated warning lights on the dashboard
The Plug-and-Play Advantage
Why deal with the hassle and expense of towing your vehicle to a dealership? A dealer repair involves purchasing an unprogrammed module, paying for labor to install it, and then paying a separate, often costly, fee for programming. Our process streamlines this entirely. We send you a fully programmed 2009 XLR Engine Module that is ready for installation upon arrival. In most cases, after installation, you may only need to perform a simple security relearn procedure (often called a key relearn or anti-theft relearn), which can typically be done in your own driveway without any special tools. This saves you time, money, and the stress of a dealership visit.
Guaranteed Compatibility
This module is a direct replacement for a wide range of GM vehicles. It is interchangeable with the following service numbers, ensuring a perfect match for your application:
12636659, 12639300, 1263605, 12628993, 12628911, 12625453, 12622175, 12630464, 12678512
Extensive Vehicle Fitment
While this is the primary module for the 2009 Cadillac XLR, it also fits a broad selection of other GM cars and trucks. Please verify your specific model and options below:
- CADILLAC CTS 2009 (6.2L)
- CADILLAC DTS 2009-2011
- CADILLAC SRX 2009 (4.6L)
- CADILLAC STS 2009-2010 (4.4L, 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 by a dealer?
No. This module comes fully pre-programmed to your vehicle’s specific VIN with the latest GM software updates. It is ready for installation right out of the box, saving you a trip to the dealership.
Where do I provide my VIN?
You can provide your 17-digit Vehicle Identification Number (VIN) in the notes section during checkout. If you forget, we will contact you via email to request it before we can program and ship your part.
Is installation difficult?
The physical installation is typically straightforward, involving disconnecting the battery, unplugging the electrical connectors, and unbolting the old module. However, after installation, you may need to perform a security relearn procedure. Instructions for this are widely available online or in service manuals.
What happens if I install it without programming?
An unprogrammed module will not work. The vehicle will not start and run correctly because the ECM needs the VIN-specific data to communicate with the other modules on your car, such as the ignition, fuel system, and anti-theft system. That’s why our pre-programming service is essential.
Is this compatible with other part numbers?
Yes, this ECM is a direct replacement for several service numbers, including 12636659, 12639300, 12628911, and others listed in the description. This ensures you are getting the correct hardware for your vehicle.