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 triggers warning lights on your dash, you’ve come to the right place. As a technician with over two decades of experience, I’ve seen countless GM vehicles, including the SAAB 9-7X, sidelined by a failed Transmission Control Module (TCM). This isn’t just an inconvenience; it’s a safety issue that affects your vehicle’s performance and reliability. This T42 series TCM, part number 24240400, is the definitive solution to get your vehicle back to operating as it should.
The core of the problem often lies in the original module’s vulnerability to heat and vibration within the engine bay. Over time, these factors can cause internal circuit board failures, leading to the erratic behavior you’re experiencing. Our replacement 2006-2009 SAAB 9-7X TCM is built to meet or exceed original equipment standards, providing a dependable, long-term fix. Best of all, we handle the most complex part for you: the programming. Simply provide your vehicle’s VIN at checkout, and we’ll program the module with the latest GM software. It arrives at your door ready for a true plug-and-play installation, saving you hundreds of dollars and a trip to the dealership.
Case Study: A Tricky Diagnosis
A customer brought in a 2008 GMC Envoy (a platform-mate to the 9-7X) with a complaint of intermittent, violent 1-2 shifts and occasionally getting stuck in 3rd gear (limp mode). No single solenoid code was present, just a generic P0700 (Transmission Control System Malfunction). After verifying the fluid level and condition were good, we monitored live data. We noticed the TCM would momentarily lose communication right before a harsh shift. Instead of a costly transmission rebuild, we recommended replacing the TCM. With a new, VIN-programmed module installed, the shifting became perfectly smooth, and the communication drops ceased. This is a classic failure scenario for these T42 modules.
Is Your SAAB 9-7X Exhibiting These Transmission Faults?
A failing TCM will give you clear warning signs. If you notice any of the following, it’s highly likely your module is the culprit:
- ✔ Harsh, jerky, or delayed gear shifts.
- ✔ The vehicle is stuck in a single gear (often called “limp mode”).
- ✔ Check Engine Light or Transmission Warning Light is on with codes like P0700, P0750, P0753, P0758, or other solenoid-related DTCs.
- ✔ Failure to upshift or downshift, causing poor acceleration or high RPMs.
- ✔ A noticeable decrease in fuel economy.
- ✔ The transmission seems to slip in and out of gear.
Your 30-Minute Path to Smooth Shifting
One of the best features of this part is its straightforward installation. You don’t need to be a master mechanic to get this job done. For the SAAB 9-7X, the TCM is conveniently located in the engine compartment.
- 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 your 2006-2009 SAAB 9-7X, the TCM is found in the left-hand (driver’s side) of the engine compartment.
- Disconnect and Remove: Carefully unplug the electrical connectors. Press the release tabs firmly. Then, unbolt the module from its mounting bracket.
- Install the New TCM: Mount your new, pre-programmed module in place and securely fasten the bolts. Reconnect the electrical harnesses until they click into place.
- Final Steps: Reconnect the battery terminal. Start the vehicle and let it idle for a few minutes. While not always necessary, using a basic scan tool to clear any stored DTCs is a good final practice. Take a test drive to confirm the smooth shifting performance.
Verified Vehicle Compatibility
This T42 TCM is a direct fit for a wide range of General Motors vehicles. While this page is dedicated to the 2006-2009 SAAB 9-7X TCM, it is also compatible with the following models. Please verify the location noted for your specific vehicle.
- SAAB 9-7X 2006-2009 (LH engine compartment)
- Chevrolet Silverado, Tahoe, Suburban, Avalanche 2007-2013 (next to battery)
- GMC Sierra, Yukon, Yukon XL 2007-2013 (next to battery)
- Chevrolet Express & GMC Savana Vans 2006-2014 (RH engine compartment)
- Chevrolet Trailblazer & GMC Envoy 2006-2009 (LH engine compartment)
- Buick Rainier 2006-2007
- Cadillac DTS 2006-2011 (RH front engine compartment)
- Hummer H3 2008-2010 (RH rear engine compartment)
- Chevrolet Impala & Monte Carlo 2006-2011 (lower air cleaner housing)
- Pontiac Grand Prix & G6 2006-2010
- And many more GM models. This part interchanges with: 24252114, 24234503, 24230461, 24234274, 24235340, 24239224, 24240400, 24256960, and others.
Frequently Asked Questions
What does ‘VIN Programmed’ mean for me?
It means we load your vehicle’s specific identification number (VIN) and the latest GM software onto the module before shipping. This ensures it communicates perfectly with your vehicle’s engine computer and other systems right out of the box, eliminating the need for an expensive dealership visit for programming.
Do I need to send my old part back?
No, there is no core charge or need to return your old module. You can dispose of it or keep it, making the process faster and more convenient for you.
Will this fix a P0700 diagnostic trouble code?
A P0700 is a general code indicating the TCM has detected a fault. Often, replacing a faulty TCM will resolve the P0700 and any other specific transmission codes (like for solenoids) that were present. However, you should always ensure other potential issues, like low fluid or wiring problems, have been ruled out.
Is there a warranty included with this part?
Yes, this Transmission Control Module comes with a one-year warranty, giving you peace of mind and confidence in your repair.