Restore Smooth, Reliable Shifting to Your Buick Terraza
If your 2006-2007 Buick Terraza is suffering from harsh shifting, getting stuck in gear, or throwing transmission-related check engine light codes, a failing Transmission Control Module (TCM) is the most likely culprit. As an experienced technician, I’ve seen countless minivans and family vehicles sidelined by what seems like a major transmission problem, when the real issue is this small electronic brain. This OEM-quality T42 TCM, part number 24230461, is the definitive solution to restore your vehicle’s performance and dependability. It arrives pre-programmed to your Terraza’s specific Vehicle Identification Number (VIN), making it a true plug-and-play fix that eliminates the need for an expensive trip to the dealership.
From the Diagnostic Bay: A Terraza Back on the Road
I remember a customer bringing in their ’07 Terraza, completely frustrated. The van was their only family vehicle, and it was stuck in what we call “limp mode”—it wouldn’t shift past 2nd gear. They were worried about a multi-thousand dollar transmission rebuild. After plugging in my scan tool, I saw a P0700 (Transmission Control System Malfunction) code. Instead of tearing into the transmission, I checked the TCM. After confirming power and ground, it was clear the module itself had failed internally. We installed one of these pre-programmed T42 modules. In less than an hour, the van was shifting perfectly, the codes were gone, and the family was back on the road for a fraction of what they feared. This is the power of a proper diagnosis and a quality part.
Is Your Terraza Exhibiting These Transmission Problems?
A faulty TCM can manifest in several ways. If you’re experiencing any of the following, this module is the solution you need. The key to avoiding a costly, unnecessary transmission replacement is correctly identifying the symptoms of a failed 2006-2007 Terraza Transmission Control Module.
- ✔ Abrupt, jerky, or delayed gear shifts.
- ✔ The vehicle is stuck in a single gear (limp mode) and won’t upshift or downshift.
- ✔ Check Engine Light or Transmission Warning Light is illuminated with codes like P0700, P0750, or other solenoid-related DTCs.
- ✔ A noticeable drop in fuel economy due to inefficient shifting.
- ✔ The transmission feels like it’s slipping between gears.
- ✔ No communication with the TCM when using a diagnostic scan tool.
A Straightforward Guide to Installation
One of the best features of this module is its ease of installation. For the Buick Terraza, this job is well within the reach of a DIY enthusiast. No specialized tools are required, and you can have your vehicle running smoothly again in under 30 minutes.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electronic component replacement. This prevents electrical shorts and helps reset the vehicle’s systems.
- Locate the Module: On your 2006-2007 Terraza, the TCM is typically located on the driver’s side of the engine bay, mounted to the LH strut tower. 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. Keep the hardware in a safe place.
- Install the New Module: Bolt the new, pre-programmed TCM into place. Securely reconnect the wiring harnesses, ensuring they click into place to confirm a solid connection.
- Final Steps: Reconnect the battery terminal. Start the vehicle and allow it to idle for a few minutes. If you have a basic scan tool, it’s a good practice to clear any stored fault codes. Take the vehicle for a test drive to confirm that all shifting issues are resolved.
Verified Vehicle Compatibility List
While this part is a direct-fit solution for the 2006-2007 Buick Terraza, this versatile T42 module also fits a wide range of other General Motors vehicles. Please confirm your specific model and location notes below. This module is interchangeable with part numbers: 24252114, 24234503, 24234274, 24235340, and more.
- Buick Terraza: 2006-2007 (Transmission; LH strut tower)
- Chevrolet Cobalt / HHR: 2006-2011 (Transmission; LH strut tower / engine compartment)
- Chevrolet Impala / Monte Carlo: 2006-2011 (Transmission; lower air cleaner housing)
- Chevrolet Silverado / Tahoe / Suburban: 2007-2013 (Transmission; next to battery)
- GMC Sierra / Yukon: 2007-2013 (Transmission; next to battery)
- Pontiac G6 / Grand Prix: 2006-2010 (Transmission; LH strut tower / lower air cleaner housing)
- Saturn Vue / Aura: 2007-2010 (Transmission; LH front engine compartment / frame rail)
- …and many other GM models listed in the fitment data.
Frequently Asked Questions
Do I need to have this module programmed by a dealer?
No. This module comes fully pre-programmed to your vehicle’s VIN. It is ready for installation right out of the box, saving you time and money on dealership programming fees.
What is a core charge? Do I need to send my old part back?
There is no core charge for this part. You can keep your old module, recycle it, or dispose of it at your convenience without any extra fees.
Will this fix a P0700 trouble code?
Yes. A P0700 code indicates a general fault in the transmission control system. In most cases, a failing TCM is the root cause, and replacing it with this module will resolve the code and the underlying shifting problems.
Is the 2006-2007 Terraza Transmission Control Module difficult to access?
No, it’s one of the more accessible modules. On the Terraza, it’s located on the driver’s side strut tower in the engine bay, making for a quick and easy swap with basic hand tools.