End Frustrating Shifting Problems in Your Buick Rendezvous
If your 2006-2007 Buick Rendezvous is suffering from harsh shifts, delayed gear engagement, or has suddenly gone into limp mode, you’re not alone. These are classic signs of a failing Transmission Control Module (TCM). After years on the road, the original T42 TCM can develop internal faults, leading to poor communication with the transmission. This replacement module, part number 24243921, is the definitive solution to restore your vehicle’s drivability and reliability. We pre-program it to your Rendezvous’s specific VIN, making it a true plug-and-play fix that eliminates the need for an expensive trip to the dealership.
Case Study: A Tricky Diagnosis
A customer brought in a 2007 Rendezvous with what they thought was a completely failed transmission. It was banging into gear and wouldn’t shift past 2nd. The initial codes were all over the place—solenoid faults, communication errors (U-codes), and a generic P0700. In my shop, I’ve seen this exact scenario dozens of times. Before condemning a costly mechanical part like the transmission itself, the first place I check is the TCM. Heat cycles and vibrations, especially with its location under the air cleaner box, cause internal solder joints to fail. We swapped in one of our VIN-programmed modules, cleared the codes, and the Rendezvous shifted like it just rolled off the factory floor. It saved the customer thousands on an unnecessary transmission replacement.
Is Your Rendezvous Showing These Symptoms?
A faulty TCM can manifest in various ways, often mimicking mechanical transmission failure. Here are the most common indicators that your module needs replacement:
- ✔ Harsh, jerky, or erratic gear changes.
- ✔ The vehicle gets stuck in one gear (often called “limp mode”).
- ✔ Check Engine Light or Transmission Warning Light is illuminated.
- ✔ Diagnostic Trouble Codes (DTCs) are present, such as P0700, P0750, or other solenoid-related faults.
- ✔ Delayed engagement when shifting from Park to Drive or Reverse.
- ✔ Poor fuel economy and a feeling of lost power.
- ✔ Complete loss of communication with the scan tool or other modules.
A Straightforward Guide to Installation
You don’t need to be a master mechanic to install this part. The process is straightforward and can be completed in your driveway in under 30 minutes. This is a critical repair for any 2006-2007 Rendezvous TCM failure.
- 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 2006-2007 Buick Rendezvous, the TCM is conveniently located under the air cleaner box in the engine compartment.
- Remove the Old Unit: Unplug the electrical connectors from the old module. Then, unbolt it from its mounting bracket.
- Install the New Module: Bolt the new, pre-programmed TCM into place and securely reconnect the electrical harnesses.
- Final Steps: Reconnect the battery terminal. While our programming handles the heavy lifting, it’s good practice to use a basic OBD2 scan tool to clear any lingering fault codes from the vehicle’s memory.
Why Choose a Pre-Programmed Module?
The brain of your automatic transmission, the 2006-2007 Rendezvous TCM, requires precise software to function correctly. Our service eliminates the biggest headache of this repair. We flash the module with the latest GM-certified software using your vehicle’s VIN before it ships. This ensures that all shift points, torque converter lockup strategies, and diagnostic parameters are perfectly matched to your Rendezvous, providing OEM-level performance right out of the box. No programming fees, no dealer appointments, and no compatibility issues.
Verified Vehicle Compatibility
This T42 Transmission Control Module is a direct replacement for part number 24243921 and other interchangeable numbers. While this page focuses on the Buick Rendezvous, it is also compatible with a wide range of other GM vehicles. Please verify your part number or contact us for fitment confirmation.
Buick: Allure, LaCrosse, Lucerne, Rainier, Rendezvous (2006-2007)
Cadillac: DTS
Chevrolet: Avalanche, Cobalt, Colorado, Express, HHR, Impala, Malibu, Monte Carlo, Silverado, SSR, Suburban, Tahoe, Trailblazer
GMC: Canyon, Envoy, Savana, Sierra, Yukon
Hummer: H3
Pontiac: G5, G6, Grand Prix, Pursuit, Montana, Torrent
Saab: 9-7X
Saturn: Aura, Ion, Vue
Frequently Asked Questions
Do I need to have the dealer program this 2006-2007 Rendezvous TCM?
No. This module arrives fully programmed to your vehicle’s VIN. It is ready for immediate installation without any additional programming required.
Is this a simple DIY job?
Yes, for most people with basic hand tools. On the Rendezvous, the TCM is located under the air cleaner box, making it accessible. The entire process typically takes less than 30 minutes.
What if my problem isn’t the TCM?
While the symptoms listed are highly indicative of a TCM failure, it’s always best to perform a proper diagnosis. Common DTCs like P0700 (Transmission Control System Malfunction) strongly point to an electronic issue, making the TCM the most likely culprit.
Is there a core charge for my old part?
No, we do not require you to send back your old module. There is no core charge associated with this purchase, saving you time and hassle.
What warranty is included?
This transmission control module is backed by our one-year, hassle-free warranty, giving you confidence and peace of mind in your repair.