Restore Peak Transmission Performance in Your Buick Terraza
Is your 2006-2007 Buick Terraza suffering from erratic shifting, delayed gear engagement, or a persistent check engine light? These are classic symptoms of a failing Transmission Control Module (TCM). The TCM is the electronic brain of your automatic transmission, responsible for orchestrating shift points, managing torque converter lockup, and monitoring overall transmission health. When it fails, it can leave your vehicle feeling unreliable and, in some cases, completely immobile. This VIN-programmed T42 TCM, part number 24241806, is the definitive solution to restore your vehicle’s factory performance and drivability.
From the Diagnostic Bay
We had a 2007 Buick Terraza come into the shop with the check engine light on and a complaint of harsh, unpredictable shifts. The customer was worried they were looking at a complete transmission rebuild, which would have cost thousands. A quick scan revealed the notorious P0700 code—a generic transmission fault. Digging deeper, we found specific solenoid circuit codes pointing towards an internal TCM failure. Instead of a costly mechanical repair, we installed one of our VIN-programmed T42 modules. The installation took less than 30 minutes. After clearing the codes, the Terraza shifted as smoothly as it did the day it left the factory. The customer was thrilled to have their van back on the road for a fraction of the feared cost.
Symptoms of a Failing 2006-2007 Terraza TCM
A faulty TCM can manifest in various ways, often mimicking more severe mechanical transmission problems. If you’re experiencing any of the following issues, your TCM is the most likely culprit:
- ✔ Harsh or Erratic Shifting: Abrupt, jerky gear changes or unpredictable shifting patterns during acceleration and deceleration.
- ✔ Delayed Engagement: A noticeable pause when shifting from Park into Drive or Reverse.
- ✔ Stuck in Gear / Limp Mode: The transmission may refuse to shift out of a single gear (often 2nd or 3rd) to prevent further damage.
- ✔ Warning Lights: The Check Engine Light or a dedicated transmission warning light will illuminate on your dashboard. Common diagnostic trouble codes (DTCs) include P0700, P0750, and other solenoid-related faults.
- ✔ Poor Fuel Economy: Inefficient shifting leads to the engine working harder than necessary, causing a significant drop in gas mileage.
- ✔ No Communication: In severe cases, a scan tool may be unable to communicate with the TCM, indicating a complete module failure.
Why Choose Our Programmed T42 Transmission Module?
This isn’t just a replacement part; it’s a comprehensive, plug-and-play solution designed for a seamless repair. We handle the complex programming so you don’t have to. When you order, we flash the module with your vehicle’s specific Vehicle Identification Number (VIN) and the latest GM software updates. This ensures perfect communication between the TCM, the engine control module (ECM), and other vehicle systems right out of the box.
Key Features and Benefits:
- ✔ 100% Plug-and-Play: Arrives pre-programmed to your VIN. No expensive trips to the dealership for programming are required.
- ✔ Restores Factory Performance: Corrects shifting issues, eliminates fault codes, and restores the smooth, efficient operation of your 4-speed automatic transmission (like the 4L60E/4L65E).
- ✔ OEM-Standard Quality: Built to meet or exceed original equipment specifications for durability and long-term reliability.
- ✔ No Core Charge: Keep your old module. There’s no need to worry about returning a core or extra charges.
- ✔ Broad Compatibility: While perfect for your Terraza, this T42 module is also a direct replacement for a wide array of GM vehicles, including models from Chevrolet, GMC, Pontiac, Saturn, and more. It interchanges with part numbers 24252114, 24234503, 24241806, and others.
Simple Installation Guide
Replacing the TCM on your 2006-2007 Buick Terraza is a straightforward job that can be completed with basic hand tools. The module is conveniently located on the LH (driver’s side) strut tower in the engine compartment.
- Safety First: Disconnect the negative terminal of your vehicle’s battery.
- Locate the TCM: Find the module on the driver’s side strut tower.
- Disconnect Connectors: Carefully unplug the electrical connectors from the old module.
- Remove Old Module: Unbolt the old TCM from its mounting bracket.
- Install New Module: Bolt the new, pre-programmed TCM into place, reconnect the electrical connectors, and reconnect the battery.
- Final Steps: Use a standard OBD2 scan tool to clear any stored diagnostic trouble codes. Start the vehicle and take it for a test drive to confirm the issue is resolved.
Frequently Asked Questions
Will this part require programming at a dealership?
No. This Transmission Control Module is delivered fully programmed to your vehicle’s VIN. It is a true plug-and-play solution, saving you time and the high cost of dealer programming.
Where is the TCM located on a 2006-2007 Buick Terraza?
On the 2006-2007 Terraza, the TCM is located in the engine bay, mounted on the driver’s side (LH) strut tower.
Will this TCM fix a P0700 trouble code?
A P0700 code is a general transmission fault indicator, meaning the TCM has detected a problem. This code is often accompanied by more specific codes. If the underlying cause is a faulty TCM, replacing it with our programmed unit will resolve the P0700 code and related issues.
Is this a new or used part?
This is a high-quality, OEM-standard replacement part that has been expertly prepared and programmed to ensure reliability and performance that meets or exceeds original specifications.
Do I need to return my old TCM?
No, there is no core charge for this part. You can keep or dispose of your old module without any additional fees or hassle.