Restore Smooth Shifting to Your Buick Terraza
If your 2006-2007 Buick Terraza is suffering from harsh shifting, getting stuck in gear, or has an illuminated check engine light, a failing Transmission Control Module (TCM) is the most likely culprit. As a mechanic with over two decades of diagnostic experience, I’ve seen how a faulty TCM can mimic a catastrophic transmission failure, causing unnecessary stress and repair bills. This T42 series TCM, part number 24252114, is the definitive solution. It arrives pre-programmed to your van’s specific VIN, making it a true plug-and-play fix that restores the precise, reliable performance you depend on for family trips and daily driving.
A Technician’s Notebook
I remember a 2007 Terraza that came into my shop. The owner was convinced they needed a full transmission rebuild, quoted at over $3,000 elsewhere. The van was stuck in 3rd gear (limp mode) and had a P0700 code. After a quick check of the fluid and connectors, my experience pointed straight to the TCM. These modules, located on the strut tower, are susceptible to engine bay heat and vibration over time, which can corrupt the internal logic. We swapped in a VIN-programmed module just like this one. In under 30 minutes, the van was shifting perfectly, the codes were gone, and the customer saved a fortune. Don’t overlook this critical component—it’s often the simple, effective fix.
Is Your Terraza Exhibiting These Transmission Issues?
A failing TCM sends clear warning signs. If you’re experiencing any of the following, it’s time to consider a replacement. Ignoring these symptoms can lead to further transmission damage.
- ✔ Harsh, delayed, or erratic gear shifts.
- ✔ Vehicle is stuck in one gear (often called “limp mode”).
- ✔ Check Engine Light or Transmission Warning Light is on.
- ✔ Diagnostic Trouble Codes (DTCs) are present, such as P0700, P0750, or other solenoid-related faults.
- ✔ A sudden drop in fuel economy.
- ✔ The transmission seems to slip or fails to engage properly from a stop.
Why Choose Our Programmed 2006-2007 Terraza TCM?
This isn’t just a replacement part; it’s a complete solution designed to get your vehicle back on the road with confidence. We handle the complex part so you don’t have to.
- ✔ VIN Programmed for You: We load the latest GM software calibrated to your specific vehicle’s VIN. This ensures perfect communication between the engine and transmission for optimal shift strategy and fuel efficiency, with no dealer intervention required.
- ✔ OEM-Standard Reliability: Built to meet or exceed original equipment specifications, this module is engineered for durability and long-lasting performance, backed by a solid one-year warranty.
- ✔ No Core Charge: Keep your old part. We don’t require a core return, saving you the time, money, and hassle of shipping your old module back.
Your Step-by-Step Installation Guide
This is a job most DIYers can handle with basic tools in their own garage. For the 2006-2007 Terraza, the TCM is conveniently located, making the swap straightforward.
- 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 Terraza, the TCM is mounted to the driver’s side (LH) strut tower in the engine compartment. It’s a silver box with electrical connectors.
- Disconnect and Remove: Carefully unclip the wiring harness connectors. Then, unbolt the module from its mounting bracket. There are typically just a few bolts holding it in place.
- Install the New TCM: Mount the new module securely onto the bracket and firmly reconnect the wiring harnesses. You should hear a click as they lock into place.
- Final Steps: Reconnect the battery terminal. While the module is plug-and-play, it’s best practice to use a basic OBD2 scan tool to clear any stored transmission fault codes to ensure a clean slate for the new unit.
Verified Vehicle Compatibility
While this module is the perfect fit for your 2006-2007 Buick Terraza, it is also compatible with a wide range of other General Motors vehicles. This part interchanges with numbers 24234503, 24242391, and more, fitting models like:
- ✔ Buick Allure, LaCrosse, Lucerne, Rendezvous
- ✔ Chevrolet Cobalt, HHR, Impala, Malibu, Monte Carlo, Uplander
- ✔ Pontiac G5, G6, Grand Prix, Pursuit
- ✔ Saturn Aura, Ion, Vue
- ✔ And many other GM trucks and SUVs.
Frequently Asked Questions
Do I need to take my van to the dealer for programming after installation?
No. This 2006-2007 Terraza TCM is delivered to you pre-programmed using your vehicle’s VIN. The installation is a simple plug-and-play process, saving you hundreds in dealership fees.
Where is the TCM located on my 2006 Buick Terraza?
You will find the Transmission Control Module in the engine bay, mounted directly on the driver’s side (LH) strut tower.
Will this part fix a P0700 trouble code?
A P0700 code is a general transmission fault request. In many cases, a faulty TCM is the root cause that triggers this code. Replacing the module with our programmed unit is a very common and effective fix for this issue.
What tools are required for this job?
You’ll only need basic hand tools, such as a socket set and ratchet, to remove the mounting bolts and disconnect the battery. A simple OBD2 scanner is recommended for clearing codes post-installation but is not strictly required.
Is there a warranty included with this part?
Yes, this module is backed by our comprehensive one-year, hassle-free warranty for your peace of mind.