Restore Flawless Shifting to Your SAAB 9-7X
If you’re dealing with the frustration of a transmission that won’t shift correctly, gets stuck in gear, or throws a check engine light, you’re not alone. The Transmission Control Module (TCM) is the brain of your automatic transmission, and when it fails, it can cause a host of problems that make your vehicle unreliable. This T42 TCM, part number 24234503, is the definitive solution for your 2006-2009 SAAB 9-7X and a wide range of other GM vehicles. The best part? It arrives at your door pre-programmed to your vehicle’s specific VIN, eliminating the need for an expensive trip to the dealership for programming.
The Plug-and-Play Solution for a 2006-2009 SAAB 9-7X TCM
As a technician with over two decades of experience, I’ve seen countless vehicles sidelined by a faulty TCM. These modules are responsible for interpreting data from sensors all over the vehicle to command precise gear changes and torque converter lockup. Over time, heat cycles and vibrations in the engine bay can degrade internal electronic components, leading to the erratic behavior you’re likely experiencing. This replacement module is built to OEM specifications to ensure long-lasting reliability, restoring the smooth, predictable performance your vehicle had when it was new.
A Technician’s Notebook: The Intermittent Limp Mode Case
A customer brought in a 2008 SAAB 9-7X with a maddening problem: it would randomly go into limp mode (stuck in 3rd gear) but would reset after shutting the car off. The check engine light was on with a generic P0700 (Transmission Control System Malfunction) code. We checked the wiring and solenoids, which all tested fine. The issue pointed squarely at the TCM itself having an internal, heat-related failure. Instead of a costly diagnostic goose chase, we installed a VIN-programmed 2006-2009 SAAB 9-7X TCM. The customer was back on the road in under an hour, problem solved permanently, without paying for dealership programming fees.
Is Your SAAB 9-7X Showing These Transmission Warning Signs?
A failing TCM can manifest in several ways. If you’re experiencing any of the following, this module is your likely solution:
- ✔ Harsh, slamming shifts or delayed gear engagement.
- ✔ Vehicle is stuck in “limp mode” and will not shift out of a single gear.
- ✔ Check Engine Light or Transmission Warning Light is illuminated.
- ✔ Diagnostic Trouble Codes (DTCs) are present, such as P0700, P0750-P0758 (solenoid circuit faults), or other transmission-related codes.
- ✔ A sudden drop in fuel economy or a transmission that seems to be overheating.
- ✔ Complete loss of communication with the transmission module (no-start or no-shift condition).
A Straightforward Guide to Your TCM Installation
One of the biggest benefits of this module is its ease of installation. For most DIYers with basic tools, this is a job that can be completed in under 30 minutes. Here’s a general guide:
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts and to help reset the system.
- Locate the TCM: On the SAAB 9-7X, the TCM is typically found in the engine compartment on the driver’s side (LH). On other GM models, it could be next to the battery, under the air cleaner box, or on the LH strut tower.
- Disconnect and Remove: Carefully unplug the electrical connectors. They have locking tabs that need to be released. Then, unbolt the module from its mounting bracket.
- Install the New Module: Bolt the new, pre-programmed TCM into place and securely reconnect the electrical harnesses. Ensure they click into place.
- Final Steps: Reconnect the battery terminal. Start the vehicle and let it idle for a few minutes. If you have a basic scan tool, it’s a good idea to clear any stored DTCs from the system.
Verified Vehicle Compatibility List
This T42 TCM is a direct replacement for a wide array of General Motors vehicles equipped with 4-speed automatic transmissions like the 4L60E, 4L65E, and 4L70E. Please verify your model and location notes below:
- SAAB 9-7X (2006-2009): Transmission; (LH engine compartment)
- Chevrolet Silverado & GMC Sierra 1500 (2007-2013): Transmission; (next to battery)
- Chevrolet Tahoe & GMC Yukon (2007-2009): Transmission; (next to battery)
- Chevrolet Trailblazer & GMC Envoy (2006-2009): Transmission; (LH engine compartment)
- Chevrolet Impala (2006-2011): Transmission; (lower air cleaner housing)
- Hummer H3 (2008-2010): Transmission; (RH rear engine compartment)
- Cadillac DTS (2006-2011): Transmission; (RH front engine compartment)
- …and many more GM cars, trucks, and SUVs. See full list for details.
Frequently Asked Questions
Do I need to have this module programmed by a dealer?
No. We pre-program the module to your vehicle’s VIN before shipping. It is ready for plug-and-play installation right out of the box, saving you time and money.
Is there a core charge for my old part?
No, there is no core charge. You can keep your old module without the hassle of returning it.
Will this fix a P0700 trouble code?
A P0700 code is a general fault code indicating the TCM has detected a problem. While this module often resolves the root cause, it’s important to ensure other issues like wiring or solenoids aren’t the primary fault. In most cases of internal TCM failure, this part is the correct fix.
What is the warranty on this part?
This transmission control module comes with a one-year warranty, giving you peace of mind with your purchase.
How do I provide my VIN for programming?
You will be prompted to enter your vehicle’s 17-digit VIN during the checkout process. Please double-check it for accuracy to ensure correct programming.