If you’re dealing with erratic shifting, a check engine light, or your 2006-2009 SAAB 9-7X is stuck in limp mode, a failing Transmission Control Module (TCM) is the most likely culprit. As the electronic brain of your 4L60E or 4L65E automatic transmission, the TCM orchestrates every gear change. When it malfunctions, it can make your sophisticated SUV feel unpredictable and unsafe. This isn’t just an inconvenience; it’s a critical failure that compromises performance and fuel economy.
This OEM-quality T42 TCM, part number 24256960, is the definitive solution. We take the guesswork and dealership hassle out of the equation. Before we ship it, we program the module to your SAAB’s specific Vehicle Identification Number (VIN). This means it arrives ready for a true plug-and-play installation, with the latest GM software updates already loaded. You get a reliable, long-term fix that restores the smooth, responsive shifting you expect from your vehicle.
Case Study: A Tricky Diagnosis
A customer brought in a 2008 SAAB 9-7X with a classic complaint: intermittent harsh 1-2 shifts and occasionally getting stuck in 3rd gear after warming up. They had already replaced a shift solenoid with no luck. The scanner showed a generic P0700 code. In my experience, these symptoms on the GMT360 platform (which includes the 9-7X, Trailblazer, and Envoy) almost always point back to the T42 TCM. Heat soak from the engine compartment degrades the internal electronics over time, causing these exact intermittent electrical faults. We installed one of our VIN-programmed modules, cleared the codes, and the vehicle’s shifting performance was immediately restored. The customer avoided a costly, unnecessary transmission teardown.
Is Your SAAB 9-7X Showing These Symptoms?
A faulty TCM can manifest in several ways. If you’re noticing any of the following, it’s time to consider a replacement:
- ✔ Harsh, banging, or delayed gear shifts.
- ✔ The vehicle is stuck in a single gear (often 2nd or 3rd), also known as “limp mode.”
- ✔ An illuminated Check Engine Light or Transmission Warning Light.
- ✔ Diagnostic Trouble Codes (DTCs) are present, especially P0700 (Transmission Control System Malfunction) or various solenoid codes (e.g., P0751, P0756).
- ✔ Complete loss of communication with the transmission module.
- ✔ A sudden drop in fuel efficiency or signs of the transmission overheating.
A Straightforward Guide to Your SAAB 9-7X Transmission Module Installation
Replacing the TCM on your SAAB 9-7X is a job most DIYers can handle in their own garage in under 30 minutes. Our pre-programmed module makes it even simpler.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts and to help reset the system.
- Locate the Module: On the 2006-2009 SAAB 9-7X, the TCM is conveniently located in the engine compartment on the driver’s side (LH side).
- Disconnect and Remove: Carefully unplug the electrical connectors from the old module. 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 connectors. Ensure they click into place.
- Final Steps: Reconnect the battery terminal. While our programming handles the critical setup, it’s good practice to use a basic OBD2 scan tool to clear any stored fault codes from the vehicle’s memory. Start the engine and enjoy restored shifting performance!
Verified Vehicle Compatibility
This T42 Transmission Control Module is a direct-fit replacement for a wide range of General Motors vehicles equipped with 4-speed automatic transmissions like the 4L60E, 4L65E, and 4L70E. While this page focuses on the 2006-2009 SAAB 9-7X Transmission Module, it is also compatible with the following models. Please verify your specific model and year.
- SAAB 9-7X: 2006-2009
- Chevrolet: Trailblazer, Tahoe, Silverado, Suburban, Colorado, Impala, Cobalt, HHR, Express Van
- GMC: Envoy, Yukon, Sierra, Savana Van, Canyon
- Buick: Rainier, LaCrosse, Lucerne
- Cadillac: DTS
- Pontiac: G6, Grand Prix
- Hummer: H3
- Saturn: Vue, Aura, Ion
This part is interchangeable with service numbers: 24252114, 24234503, 24230461, 24234274, 24235340, 24235754, 24238856, 24239224, 24239926, 24240400, 24241806, 24243901, 24243921, 24255280, 24235732, 24235753, 24240449, and YNXS.
Frequently Asked Questions
Do I need to take my vehicle to a dealer after installation?
No. This module is delivered pre-programmed to your SAAB 9-7X’s VIN. The programming is included in the price, allowing for a direct installation without any need for expensive dealership tools or services.
What is the warranty on this TCM?
This transmission control module comes with a one-year warranty, giving you peace of mind and confidence in your repair.
Is this a new or used part?
This is a high-quality, inspected, and tested OEM-standard part guaranteed to restore your vehicle’s functionality. It is not a new part from the original manufacturer but is verified to meet or exceed original performance specifications.
How do I provide my VIN for programming?
You will be prompted to enter your 17-digit VIN during the checkout process. Please double-check it for accuracy to ensure perfect compatibility.
Will this fix a P0700 check engine light code?
Yes, in most cases. The P0700 code is a general fault code indicating the TCM has detected a problem. If the TCM itself is the source of the fault, replacing it with this programmed unit will resolve the issue and allow the code to be cleared.