If you’re dealing with frustrating and unpredictable shifting in your 2006-2007 Buick Rendezvous, you’ve likely pinpointed the culprit: a failing Transmission Control Module (TCM). As a technician with over two decades of experience under the hood, I’ve seen countless GM vehicles sidelined by faulty TCMs. The symptoms are often mistaken for major transmission failure, but the fix is surprisingly straightforward with the right part.
This T42 Transmission Control Module, corresponding to part number 24255280, is the definitive solution. It’s not just a replacement part; it’s a complete fix that arrives at your door pre-programmed to your vehicle’s specific VIN. This means you can skip the expensive trip to the dealership for programming. Once installed, it seamlessly takes control of your transmission’s shift logic, torque converter lockup, and line pressure, restoring the smooth, reliable performance you expect from your Rendezvous.
Case Study: A Tricky Diagnosis
A customer brought in a 2007 Rendezvous with a complaint that stumped a couple of other shops. The vehicle would occasionally refuse to shift out of 2nd gear, but only after it was fully warmed up. There were no consistent trouble codes, just a general P0700 (Transmission Control System Malfunction) that would pop up intermittently. After checking the fluid and wiring harness, I suspected the TCM. The internal electronics can become sensitive to heat over time, causing these exact ghost-like issues. We swapped in a VIN-programmed module, and the problem vanished instantly. It’s a classic failure I’ve diagnosed hundreds of times, saving customers from unnecessary transmission rebuilds.
Is Your Rendezvous Showing These Telltale Signs?
A failing TCM doesn’t always mean a complete breakdown. Often, the signs are subtle at first. Here’s what to look for:
- ✔ Harsh, slamming shifts or delayed gear engagement.
- ✔ The vehicle feels stuck in one gear (often called “limp mode”).
- ✔ Check Engine Light or Transmission warning light is on.
- ✔ Diagnostic Trouble Codes (DTCs) like P0700, P0750, or other solenoid-related faults are present.
- ✔ A sudden drop in fuel economy or a transmission that seems to be running hot.
- ✔ Complete loss of communication with the transmission module.
DIY-Friendly Installation for Your Rendezvous
One of the best features of this module is its simple, plug-and-play design. For your specific 2006-2007 Rendezvous TCM, the module is conveniently located with the air cleaner box, making access relatively easy for a DIYer. You can have this job done in under an hour.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- Locate the Module: Find the original TCM, which is situated near or under the air cleaner housing in your Rendezvous’s engine bay.
- Disconnect and Remove: Carefully unplug the electrical connectors. Press the release tabs firmly. Then, unbolt the old module from its mounting bracket.
- Install the New TCM: Mount the new module in the same position and securely reconnect the wiring harnesses. You’ll hear a click as they lock in place.
- Final Steps: Reconnect the battery terminal. While the module is pre-programmed, it’s good practice to use a basic scan tool to clear any old codes stored in other modules. Start the vehicle and take it for a test drive to confirm smooth shifting.
Verified Vehicle Compatibility
This module is a guaranteed direct-fit replacement for the following vehicle:
- Buick Rendezvous: 2006-2007 (Located at air cleaner box)
It is also compatible with a wide range of other General Motors vehicles. This part is interchangeable with service numbers including 24242391, 24234503, 24252114, 24230461, 24239224, and more, ensuring broad application for your repair needs.
Frequently Asked Questions
Do I need to take this part to a dealer for programming?
No. We program the module to your vehicle’s VIN before shipping. It arrives ready for installation, saving you time and money on dealership fees.
What tools are required for installation on a Rendezvous?
You’ll typically only need basic hand tools, such as a socket set to remove the air cleaner box and unbolt the module, and possibly a flathead screwdriver to help release the connector clips.
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.
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.
What if this doesn’t fix my problem?
This module is backed by our one-year warranty. If you’ve correctly diagnosed a faulty TCM, this part will resolve the issue. If problems persist, the fault may lie in the wiring, solenoids, or internal transmission components.