Restore Flawless Shifting to Your SAAB 9-7X
Are you battling with frustrating and unpredictable transmission behavior in your 2006-2009 SAAB 9-7X? Issues like harsh gear changes, getting stuck in limp mode, or a persistent check engine light can make driving a stressful experience. As a technician with over two decades of experience, I’ve seen countless GM vehicles, including the GMT360 platform that the 9-7X is built on, suffer from these exact problems. The culprit is almost always a failing Transmission Control Module (TCM). This VIN-programmed T42 TCM, part number 24241806, is the definitive, hassle-free solution to restore your vehicle’s drivability and peace of mind.
This module is the brain of your automatic transmission, controlling everything from shift points to torque converter lockup. When it fails, communication breaks down, leading to the symptoms you’re likely experiencing. We take the guesswork and extra cost out of the repair. Simply provide your vehicle’s VIN during checkout, and we will program the module with the latest GM software specific to your SAAB. It arrives at your door ready for a true plug-and-play installation, eliminating the need for an expensive trip to the dealership for programming.
Case Study: A Tricky Diagnosis
A customer brought in a 2008 Chevy Trailblazer—a mechanical twin to the SAAB 9-7X—with a complaint of intermittent ‘no-shift’ conditions and a P0700 code that would come and go. They had already replaced two shift solenoids with no luck. After a quick data stream analysis, I noticed the TCM was intermittently dropping communication. The internal circuitry was failing under heat, a classic T42 module failure. We installed a VIN-programmed module, and the problem was solved in 20 minutes. It’s a reminder that chasing individual solenoid codes can be a dead end when the controller itself is the root cause.
Diagnosing Your SAAB 9-7X: Common TCM Failure Signs
If your vehicle is exhibiting any of the following behaviors, a failing TCM is the most likely cause. Replacing your 2006-2009 SAAB 9-7X TCM can resolve these issues permanently.
- ✔ Harsh, slamming shifts or delayed gear engagement.
- ✔ The vehicle is stuck in a single gear (limp mode), often 2nd or 3rd.
- ✔ An illuminated Check Engine Light or Transmission Warning Light.
- ✔ Diagnostic Trouble Codes (DTCs) are present, such as P0700, P0750, P0753, P0758, or other solenoid-related faults.
- ✔ The transmission refuses to upshift or downshift correctly.
- ✔ A noticeable decrease in fuel economy.
- ✔ Inconsistent communication with the scan tool or complete loss of communication with the TCM.
DIY Installation: Get Your SAAB Shifting Smoothly in Under 30 Minutes
One of the best features of this pre-programmed module is its simple installation. You don’t need specialized tools or a trip to the shop. For the SAAB 9-7X, the TCM is conveniently located and easy to access.
- Step 1: Safety First. Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts and to help reset the vehicle’s adaptive memory.
- Step 2: Locate the TCM. On your SAAB 9-7X, the Transmission Control Module is typically found in the engine compartment on the driver’s side (LH).
- Step 3: Disconnect and Remove. Carefully unplug the electrical connectors from the old module. Then, unbolt the module from its mounting bracket.
- Step 4: Install the New Module. Mount your new, pre-programmed TCM in the same location, secure the bolts, and firmly reconnect the electrical connectors.
- Step 5: Finalize the Process. Reconnect the negative battery terminal. Start the vehicle and allow it to idle for a few minutes. If you have a basic scan tool, it’s good practice to clear any stored DTCs. Take the vehicle for a test drive to confirm smooth shifting.
Verified Vehicle Compatibility
This T42 TCM is a direct replacement for part number 24241806 and other interchangeable numbers. While this page is focused on the 2006-2009 SAAB 9-7X TCM, it also fits a wide range of other GM vehicles. Please verify the location noted for your specific model:
- SAAB 9-7X (2006-2009): Transmission; (LH engine compartment)
- Chevrolet Trailblazer (2006-2009): Transmission; (LH engine compartment), (8 cylinder)
- GMC Envoy (2006-2009): Transmission; (LH engine compartment), (8 cylinder)
- Chevrolet Silverado & GMC Sierra 1500/2500 (2007-2013): Transmission; (next to battery)
- Chevrolet Tahoe & GMC Yukon (2007-2009): Transmission; (next to battery)
- Hummer H3 (2008-2010): Transmission; (RH rear engine compartment)
- …and many more models from Chevrolet, GMC, Buick, Cadillac, Pontiac, and Saturn. Please check the full fitment list for confirmation.
Frequently Asked Questions
Does this module require any additional programming?
No. This Transmission Control Module is fully programmed to your vehicle’s VIN before shipping. It is a plug-and-play solution that does not require a visit to the dealership or any special tools for installation.
Is there a core charge for my old part?
No, there is no core charge. You can keep your old module, which saves you the time and expense of shipping it back.
What is the warranty on this TCM?
This part comes with a one-year warranty, ensuring it is built to OEM standards for long-lasting reliability and performance under all driving conditions.
Will this fix a P0700 trouble code?
Yes. A P0700 code is a general transmission fault request from the TCM to the ECM to turn on the check engine light. A faulty TCM is a very common cause of this code. Replacing it with our programmed module will resolve the underlying issue causing the P0700 and related transmission codes.
Where is the TCM located on my 2007 SAAB 9-7X?
On the 2006-2009 SAAB 9-7X, the TCM is located in the engine bay, on the driver’s side (LH) inner fender or near the firewall, making it easily accessible for replacement.