If your 2006-2007 Buick Rendezvous is suffering from harsh, unpredictable shifting, getting stuck in gear, or has the check engine light on with transmission codes, you’re likely dealing with a failed Transmission Control Module (TCM). As a technician with over two decades of experience, I’ve seen how a faulty TCM can make a reliable vehicle feel unsafe and frustrating to drive. This isn’t just an annoyance; it’s a core drivability issue that impacts fuel economy and can lead to more severe transmission damage if ignored.
This T42 Transmission Control Module is the definitive solution. It arrives expertly programmed to your Rendezvous’s specific Vehicle Identification Number (VIN), making it a true plug-and-play replacement. You can bypass the expensive dealership visit for programming and get your vehicle back to shifting smoothly and efficiently. This module is the brain of your automatic transmission, responsible for managing shift points, torque converter clutch lockup, and line pressure. Replacing a failing unit with this quality part restores the crisp, predictable performance you expect.
From the Diagnostic Bay
A customer brought in a 2007 Buick Rendezvous with a classic complaint: it would slam into second gear but shift fine otherwise. They were getting a generic P0700 code, and a previous shop wanted to rebuild the transmission. After hooking up my scan tool, I saw intermittent communication drops from the TCM. On these GM vehicles, the TCM is often mounted right under the air cleaner box, where it’s subjected to constant engine heat. Over years, this heat soak degrades internal circuits. We swapped in a VIN-programmed module like this one, and the harsh shift was gone instantly. It’s a 30-minute fix that saved the customer thousands on an unnecessary transmission rebuild.
Is Your Rendezvous Exhibiting These Shifting Problems?
A failing TCM can manifest in several ways. If you’re noticing any of the following, it’s a strong indicator that your module needs replacement. Addressing it promptly can prevent further damage to your transmission’s mechanical components.
- ✔ Harsh, banging, or erratic shifts between gears.
- ✔ Vehicle feels stuck in one gear (often called “limp mode”).
- ✔ Delayed engagement when shifting from Park to Drive or Reverse.
- ✔ Check Engine Light or Transmission Warning Light is illuminated.
- ✔ Diagnostic Trouble Codes (DTCs) are present, such as P0700, P0750, or other solenoid-related faults.
- ✔ A noticeable decrease in fuel efficiency.
- ✔ The transmission seems to slip or fails to shift up or down.
DIY-Friendly Installation in Under 30 Minutes
One of the best features of this repair is its simplicity, making it perfect for the DIY enthusiast. For the 2006-2007 Buick Rendezvous, the TCM is conveniently located. No specialized tools are required.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electronic work.
- Locate the Module: On your Rendezvous, the TCM is found right under the air cleaner box in the engine compartment.
- Remove the Air Box: Unclip and remove the air cleaner housing to gain clear access to the TCM.
- Disconnect and Replace: Carefully unplug the electrical connectors from the old module. Unbolt it from its mounting bracket and install the new module in its place.
- Reconnect Everything: Securely plug the connectors into your new TCM, reinstall the air cleaner box, and reconnect the battery terminal.
- Final Steps: Start the vehicle. The pre-programmed module is ready to work immediately. We recommend using a basic scan tool to clear any old stored codes from the vehicle’s memory.
Confirmed Vehicle Compatibility List
This T42 TCM, part number 24256960, is a direct replacement for a wide range of General Motors vehicles. While this page is focused on the 2006-2007 Rendezvous TCM, it also fits the following models. Please verify your specific model and options.
- Buick: Rendezvous (06-07), Rainier (06-07), LaCrosse (06-09), Allure (06-09), Lucerne (06-11)
- Chevrolet: Tahoe (07-09), Silverado (07-13), Impala (06-11), Cobalt (06-10), HHR (06-11), Trailblazer (06-09), Express Van (06-14), and more.
- GMC: Envoy (06-09), Sierra (07-13), Yukon (07-09), Savana Van (06-14), Canyon (08-12)
- Pontiac: G6 (06-10), Grand Prix (06-08), G5 (07-10)
- Saturn: Vue (07-10), Aura (07-09), Ion (06-07)
- Cadillac: DTS (06-11)
- Hummer: H3 (08-10)
- Saab: 9-7X (06-09)
Frequently Asked Questions
What does ‘VIN Programmed’ actually mean for me?
It means this module is a plug-and-play solution. We load your vehicle’s specific VIN onto the module before shipping it. This ensures it communicates perfectly with your engine computer and other systems, eliminating the need for an expensive and time-consuming programming session at a dealership.
Is this part difficult to install on my 2006-2007 Rendezvous?
Not at all. For the Rendezvous, the TCM is located under the air cleaner box. The replacement process is straightforward and typically takes less than 30 minutes with basic hand tools, making it an ideal project for a DIY mechanic.
Will this fix a P0700 trouble code?
A P0700 code is a generic fault request from the TCM to the main engine computer, indicating a transmission-related issue. While this module often resolves the root cause (like a faulty solenoid circuit inside the TCM), you should always diagnose any other specific codes that accompany the P0700 to ensure a complete repair.
Do I need to return my old TCM? (Core Charge)
No. There is no core charge for this part. You can keep your old module or dispose of it, saving you the time and hassle of a return shipment.
What is the warranty on this transmission module?
This module comes with a one-year warranty, giving you peace of mind that you are installing a quality, dependable part built to meet or exceed OEM specifications for long-term reliability.