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 signs of a failing Transmission Control Module (TCM). The TCM is the electronic brain of your automatic transmission, responsible for managing shift points, torque converter clutch engagement, and fluid pressure. When it fails, it can leave you stranded or cause unpredictable driving behavior. This replacement T42 TCM, service number 24256960, is the definitive solution to restore your minivan’s smooth and reliable operation.
From the Diagnostic Bay
We recently had a 2007 Terraza come into the shop that was stuck in ‘limp mode’—it wouldn’t shift out of 3rd gear. The owner was worried about a costly transmission rebuild. After a quick scan, we pulled a P0700 code, indicating a general transmission fault. Further digging pointed to an internal failure in the TCM. Instead of a multi-thousand dollar mechanical repair, we installed one of our VIN-programmed T42 modules. In under an hour, the codes were cleared, and the van was shifting perfectly through all gears. It’s a common issue, and this part is the correct fix.
Common Symptoms of a Failing Terraza TCM
- ✔ Harsh, jerky, or delayed shifting between gears.
- ✔ The vehicle gets stuck in a single gear (limp mode).
- ✔ Check Engine Light or Transmission Warning Light is illuminated.
- ✔ Diagnostic Trouble Codes (DTCs) such as P0700, P0750, or other solenoid-related faults are present.
- ✔ Inconsistent acceleration and poor fuel economy.
- ✔ Complete loss of communication with the transmission, leading to a no-shift condition.
Why Choose Our Programmed 2006-2007 Terraza TCM?
This isn’t just a replacement part; it’s a comprehensive, ready-to-install solution. The most critical feature is our complimentary VIN programming service. We flash the module with your Terraza’s specific Vehicle Identification Number and the latest GM-certified software before it ships. This ensures the TCM communicates flawlessly with your vehicle’s engine computer (ECU) and other systems right out of the box. You get optimal shift strategies and fuel efficiency without needing an expensive trip to the dealership for programming.
Built to meet or exceed original equipment specifications, this module guarantees reliability and longevity. It directly interchanges with a wide range of part numbers, including 24252114, 24234503, and 24242391, making it a versatile solution for many GM vehicles from that era. For your 2006-2007 Terraza TCM, this part provides a dependable and lasting repair.
Simple, Straightforward Installation
Replacing the TCM on your Terraza is a job most DIY mechanics can handle. The module is typically located on the driver’s side, attached to the LH strut tower. The process is as simple as disconnecting the battery, unplugging the old module’s electrical connectors, unbolting it, and installing the new one in its place. Once installed, reconnect the battery, and you’re ready to go. We recommend using a basic OBD2 scan tool to clear any stored fault codes after installation. Best of all, there is no core charge, so you can keep your old part without any hassle.
Frequently Asked Questions
What is VIN programming and why is it necessary?
VIN programming loads your vehicle’s specific software and calibration files onto the TCM. This is crucial for ensuring the transmission shifts correctly based on your Terraza’s engine, tire size, and axle ratio. Without it, the vehicle may not shift at all or perform poorly. Our service does this for you, so the part is plug-and-play.
Will this module fit other GM vehicles?
Yes, this T42 TCM is compatible with a wide array of GM models from 2006-2014, including the Chevrolet Uplander, Pontiac Montana, and Saturn Relay, which share a platform with your Terraza. It also fits many trucks and SUVs. We program it specifically for the vehicle you order it for.
Is any special tool required for installation?
No special tools are needed. Basic hand tools like a socket set will be sufficient for removing the mounting bolts. An OBD2 scanner is helpful for clearing codes after the installation is complete, but not strictly required for the part to function.
Do I need to return my old TCM?
No, there is no core charge or requirement to return your old module. You can dispose of it or keep it without any extra fees or hassle.
What warranty is included with this part?
This transmission control module comes with a one-year warranty, giving you peace of mind and protection against any defects in materials or workmanship.