Restore Smooth, Reliable Shifting to Your SAAB 9-7X
If you’re dealing with the headaches of a faulty transmission—harsh bangs into gear, getting stuck in limp mode, or a persistent check engine light—you’ve come to the right place. As a technician with over two decades of experience under the hood, I’ve seen countless GM vehicles, including the SAAB 9-7X, sidelined by a failing Transmission Control Module (TCM). The T42 module is the electronic brain of your 4L60E or 4L65E automatic transmission, and when it fails, it can mimic a major mechanical problem. This replacement 2006-2009 SAAB 9-7X TCM is the definitive solution, arriving pre-programmed to your vehicle’s VIN for a hassle-free, direct-fit repair.
From the Diagnostic Bay: The Intermittent Gremlin
A customer brought in their 2008 SAAB 9-7X with a complaint that stumped two other shops. The SUV would randomly refuse to shift out of 2nd gear, but only after it was fully warmed up. There were no consistent codes, just a general P0700 (Transmission Control System Malfunction) that would pop up occasionally. We suspected the T42 TCM, as heat soak is a classic failure point for these modules. Instead of recommending a multi-thousand-dollar transmission overhaul, we installed one of our VIN-programmed modules. The total repair time was under an hour, and the problem was solved completely. It’s a textbook example of how this one part can save you from a massive, unnecessary repair bill.
Is Your SAAB 9-7X Showing These Transmission Faults?
A failing TCM will cause a host of noticeable and frustrating symptoms. If your vehicle is experiencing any of the following, this module is the likely culprit:
- ✔ Abrupt, harsh, or erratic gear shifts.
- ✔ The vehicle is stuck in a single gear (often called “limp mode”).
- ✔ Delayed engagement when shifting from Park to Drive or Reverse.
- ✔ Check Engine Light or Transmission Warning Light is illuminated with Diagnostic Trouble Codes (DTCs) like P0700, P0750, or other solenoid-related faults.
- ✔ Complete failure to upshift or downshift as needed.
- ✔ A noticeable drop in fuel economy or signs of the transmission overheating.
A Straightforward Guide to a 30-Minute Fix
One of the best features of this module is its simple installation. You don’t need a lift or specialized transmission tools. For the 2006-2009 SAAB 9-7X, the process is very accessible for a DIY mechanic.
- 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 SAAB 9-7X, the TCM is typically found in the engine compartment on the driver’s side (LH side).
- Perform the Swap: Carefully disconnect the electrical connectors from the old module. Unbolt it from its mounting bracket and set it aside. Bolt the new module in its place.
- Reconnect and Finalize: Securely plug the electrical connectors into your new, pre-programmed TCM. Reconnect the battery terminal.
- Clear and Drive: Start the vehicle. Use a standard OBD2 scan tool to clear any stored transmission codes. Take the vehicle for a test drive to allow it to complete its relearn process.
Verified Vehicle Compatibility List
This T42 TCM is a direct replacement for part number 24256960 and is compatible with a wide array of General Motors vehicles equipped with 4-speed automatic transmissions. This includes, but is not limited to:
- ✔ SAAB: 9-7X (2006-2009)
- ✔ Chevrolet: Silverado, Tahoe, Suburban, Avalanche, Express Van, Colorado, Impala, Cobalt, HHR
- ✔ GMC: Sierra, Yukon, Savana Van, Canyon, Envoy
- ✔ Buick: Rainier, LaCrosse, Lucerne, Allure
- ✔ Cadillac: DTS
- ✔ Pontiac: G5, G6, Grand Prix
- ✔ Hummer: H3
- ✔ Saturn: Vue, Aura, Ion
This module also interchanges with part numbers: 24252114, 24234503, 24230461, 24234274, 24235340, 24235754, 24238856, 24239224, 24239926, 24240400, 24241806, 24243901, 24243921, 24255280, 24235732, 24235753, 24240449, and YNXS.
Frequently Asked Questions
Frequently Asked Questions
Your questions answered by an experienced technician.
What does “VIN Programmed” actually mean for me?
It means we load your vehicle’s specific Vehicle Identification Number (VIN) and the latest GM software onto the module before we ship it. This ensures it communicates perfectly with your engine computer and other systems right out of the box, eliminating the need for an expensive programming session at a dealership.
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 (like a faulty internal circuit), you should always scan for more specific codes (e.g., P0753 – Shift Solenoid A Electrical) to confirm the diagnosis. In many cases, replacing a faulty TCM will clear the P0700 and related codes.
Is this a difficult part to install myself?
Not at all. For most DIYers with basic hand tools, this is a very manageable job that takes less than an hour. The module is located in the engine bay, making it easy to access without lifting the vehicle.
Do I need to send my old TCM back?
No, there is no core charge for this part. You can keep your old module or dispose of it responsibly without any hassle or extra fees.
What kind of warranty is included?
This module is backed by our one-year, no-hassle warranty, giving you confidence and peace of mind in your repair.