Restore Peak Performance to Your Vehicle with a VIN-Programmed Engine Computer
If you’re dealing with a frustrating check engine light, poor engine performance, or a no-start condition in your SAAB or other GM vehicle, a failing Engine Control Module (ECM) is often the culprit. As the ‘brain’ of your engine, the ECM controls everything from fuel mixture and ignition timing to transmission shifting. When it fails, it can cause a cascade of problems that are difficult to diagnose. This is the definitive solution to get your vehicle running reliably again, without a costly trip to the dealership.
This isn’t just a replacement part; it’s a complete, ready-to-install solution. We take the guesswork and extra expense out of the equation. Before we ship your module, our experts will program it with the latest GM software updates using the Vehicle Identification Number (VIN) you provide. This ensures perfect compatibility with your vehicle’s specific systems, including the anti-theft immobilizer. For a professional mechanic, this saves valuable bay time. For the DIYer, it makes a complex job incredibly simple. This is the most efficient way to replace a faulty 2009 SAAB 9-7X ECM and restore its original drivability and fuel economy.
Case Study: A Tricky Diagnosis
I remember a 2009 GMC Envoy that came into my shop with a maddeningly intermittent stalling issue. The owner had already replaced the fuel pump and crank sensor. There were no hard codes, just a history of U0100 (Lost Communication With ECM/PCM) codes. After hours of checking wiring harnesses for chafing—a common issue on that platform—we noticed the engine would only stall after it was fully heat-soaked. On a hunch, we used a heat gun to carefully warm up the ECM. Within minutes, the engine sputtered and died. The internal processor was failing under thermal stress. A pre-programmed ECM like this one had the customer back on the road the same day, problem solved for good.
Is Your Vehicle Showing These Symptoms?
A failing ECM can manifest in many ways. If you’re experiencing any of the following, this module is the likely solution.
- ✔ Persistent Check Engine Light (CEL)
- ✔ Engine stalling or misfiring unpredictably
- ✔ Vehicle won’t start, but the battery and starter are good
- ✔ Noticeable decrease in fuel efficiency
- ✔ Harsh or erratic automatic transmission shifting
- ✔ Communication error codes, such as U0100, U0101
- ✔ Internal processor failure codes, like P0601, P0606
- ✔ Failure to pass state emissions testing
A Straightforward Guide to Installation
One of the biggest benefits of our service is the plug-and-play nature of this module. Because we program it to your VIN, you don’t need any special scan tools. Here’s a general guide to getting it installed:
- Safety First: Disconnect the negative terminal from your vehicle’s battery and secure it away from the post to prevent accidental contact.
- Locate the ECM: On the 2009 SAAB 9-7X, the ECM is typically located in the engine bay on the driver’s side (LH engine). Its location on other models is noted in the fitment list below. It’s a metal box with several large electrical connectors.
- Disconnect and Remove: Carefully unplug the wiring harness connectors. They have locking tabs that need to be released. Once disconnected, unbolt the old module from its mounting bracket.
- Install the New Module: Bolt the new ECM into place. Firmly reconnect the wiring harness connectors, ensuring each one clicks securely into place. A clean, tight connection is critical.
- Reconnect Power: Reattach the negative battery terminal. In some cases, a security relearn procedure may be needed, which typically involves turning the key to the ‘ON’ position for 10-15 minutes. Your vehicle’s service manual can provide specific steps if required.
Verified Vehicle Compatibility
This 2009 SAAB 9-7X ECM is a direct replacement for part number 12628911 and is interchangeable with service numbers 12636659, 12639300, 1263605, 12628993, 12625453, 12622175, 12630464, and 12678512. It fits the following vehicles:
- Buick Lucerne: 2009-2011 (4.6L)
- Cadillac CTS: 2009 (6.2L)
- Cadillac DTS: 2009-2011
- Cadillac SRX: 2009 (4.6L)
- Cadillac STS: 2009 (4.4L, 4.6L), 2010 (4.6L)
- Cadillac XLR: 2009 (ID 12636659 or 12625453)
- 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)
- SAAB 9-7X: 2009
Frequently Asked Questions
Frequently Asked Questions
What does ‘VIN Programmed’ mean?
It means we load your vehicle’s specific 17-digit Vehicle Identification Number (VIN) and the latest GM-certified software onto the module before shipping. This ensures it communicates perfectly with your car’s other systems, like the instrument cluster and anti-theft system, for a true plug-and-play installation.