If you’re dealing with the frustration of a SAAB 9-7X that shifts harshly, gets stuck in gear, or throws transmission-related codes, you’ve come to the right place. As a technician with over two decades of experience under the hood, I’ve seen countless drivers spend a fortune on transmission flushes and solenoid replacements, only to find the core issue was a failing Transmission Control Module (TCM). This T42 TCM, part number 24239224, is the definitive, hassle-free solution to restore your vehicle’s performance and your peace of mind.
The TCM is the brain of your automatic transmission, responsible for every gear change, torque converter lockup, and line pressure adjustment. When it fails, the symptoms can be unpredictable and concerning. This module is expertly pre-programmed to your vehicle’s specific VIN, ensuring it works perfectly right out of the box. You get to skip the expensive trip to the dealership for programming—this is a true plug-and-play fix designed for both professional mechanics and determined DIYers.
A Technician’s Notebook
I remember a 2008 GMC Envoy—which shares its platform and TCM with the SAAB 9-7X—that came into my shop. The owner was at his wit’s end. The truck would randomly slam into gear, and the check engine light was on with a generic P0700 (Transmission Control System Malfunction) code. Another shop had already replaced two shift solenoids with no success. My diagnostic process led me to check the TCM communication. After finding intermittent data loss, we swapped in a VIN-programmed T42 module. The difference was immediate. Shifting became buttery smooth, the code vanished, and the customer drove away with a vehicle that felt new again. This is a common story, and it almost always points back to a faulty TCM.
Is Your SAAB 9-7X Showing These Transmission Faults?
A failing TCM can mimic a major mechanical failure. Before you consider a costly transmission rebuild, check if you’re experiencing these classic signs of a bad 2006-2009 SAAB 9-7X Transmission Module:
- ✔ Abrupt, harsh, or jerky gear shifts.
- ✔ The vehicle feels stuck in one gear (often called “limp mode”).
- ✔ Delayed engagement when shifting from Park to Drive or Reverse.
- ✔ An illuminated Check Engine Light or Transmission Warning Light.
- ✔ Diagnostic Trouble Codes (DTCs) stored, such as P0700, P0750, P0753, P0758, or other solenoid-related faults.
- ✔ A sudden drop in fuel economy or a transmission overheating warning.
- ✔ Complete loss of communication with the transmission module.
DIY-Friendly Installation in Under 30 Minutes
Replacing the TCM is a straightforward job that you can tackle with basic hand tools. For the 2006-2009 SAAB 9-7X, the module is conveniently located in the left-hand (driver’s side) engine compartment, making access simple.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts and help reset the system.
- Locate the Module: Find the TCM in the LH engine compartment. It’s a small metal box with electrical connectors.
- Disconnect and Remove: Carefully unplug the wiring harnesses. Then, unbolt the module from its mounting bracket and remove it from the vehicle.
- Install the New Module: Mount your new, VIN-programmed TCM in the same location, secure the bolts, and firmly reconnect the wiring harnesses.
- Final Steps: Reconnect the battery terminal. While our programming resolves most issues, it’s good practice to use a basic OBD2 scanner to clear any old fault codes from the vehicle’s memory.
Verified Fitment for Your Vehicle
This T42 TCM is a direct-fit replacement for the 2006-2009 SAAB 9-7X Transmission Module and is also compatible with a wide range of other General Motors vehicles. It serves as a reliable replacement for multiple part numbers, including 24239224, 24252114, 24234503, and more. Below is a partial list of compatible models:
- SAAB 9-7X: 2006-2009 (LH engine compartment)
- Chevrolet Trailblazer: 2006-2009 (8 cylinder, LH engine compartment)
- GMC Envoy: 2006-2009 (8 cylinder, LH engine compartment)
- Chevrolet Silverado & GMC Sierra 1500/2500: 2007-2013 (Typically next to battery)
- Chevrolet Tahoe & GMC Yukon: 2007-2009 (Typically next to battery)
- Hummer H3: 2008-2010 (RH rear engine compartment)
- Chevrolet Impala: 2006-2011 (Under air cleaner housing)
- …and many other GM cars, trucks, and SUVs from 2006-2014.
Frequently Asked Questions
Do I need to take this module to a dealer for programming?
No. We program the module to your vehicle’s VIN before shipping. It arrives ready for plug-and-play installation, with no additional programming or dealer visits required.
Is there a core charge for my old part?
Absolutely not. There is no core charge, so you can keep your old module or dispose of it without any hassle or extra cost.
Will this fix a P0700 code?
A P0700 code is a general fault code indicating the TCM has detected a problem. In many cases where the TCM itself is the source of the failure, replacing it with this module will resolve the P0700 code and any related specific transmission codes.
What tools do I need for installation?
Installation typically only requires basic hand tools, such as a socket set and ratchet to remove the mounting bolts and disconnect the battery. No specialized equipment is needed.
What is the warranty on this part?
This transmission control module comes with a one-year warranty, giving you confidence and protection for your repair.