Is your 2006-2007 Buick Terraza suffering from harsh shifting, delayed gear engagement, or a frustrating check engine light? These are classic signs of a failing Transmission Control Module (TCM), the electronic brain of your automatic transmission. A faulty TCM can cripple your vehicle’s performance, leaving it stuck in limp mode and making it unreliable. This replacement T42 TCM, part number 24235753, is the definitive solution to restore your vehicle’s shifting performance and get you back on the road with confidence.
From the Diagnostic Bay
We had a 2007 Terraza come into the shop that was stuck in third gear. The owner was frustrated, thinking they needed a full transmission rebuild. The scanner showed a P0700 code, which is a general transmission fault request. After checking the basics, we focused on the TCM. We swapped in one of our VIN-programmed modules, cleared the codes, and took it for a test drive. The van shifted perfectly through all gears, smooth as the day it left the factory. It’s a prime example of how a targeted electronic fix can save thousands over a mechanical repair.
Symptoms of a Failing Terraza TCM
- ✔ Harsh, erratic, or delayed shifting between gears.
- ✔ Vehicle is stuck in one gear (often called “limp mode”).
- ✔ The check engine light or transmission warning light is illuminated.
- ✔ Common Diagnostic Trouble Codes (DTCs) like P0700, P0750, or other solenoid-related faults.
- ✔ Poor fuel economy and a feeling of sluggish performance.
- ✔ Complete loss of communication with the transmission, preventing it from shifting at all.
Why Choose Our 2006-2007 Terraza TCM?
This isn’t just a replacement part; it’s a complete, ready-to-install solution. The most critical feature is our complimentary VIN programming service. We flash the module with your vehicle’s specific Vehicle Identification Number and the latest GM software updates before it ships. This ensures that the TCM communicates flawlessly with your Terraza’s engine computer and other systems right out of the box. You can skip the expensive trip to the dealership for programming, saving you time and money.
Built to strict OEM specifications, this module directly replaces a wide range of original part numbers, including 24242391, 24234503, 24252114, and more, ensuring a perfect fit and function. For the 2006-2007 Buick Terraza, the TCM is typically located on the driver’s side (LH) strut tower, making for a straightforward installation that can often be completed in under 30 minutes. Simply disconnect the battery, swap the modules, reconnect the battery, and clear any stored codes with a basic scan tool.
Frequently Asked Questions
What does ‘VIN Programmed’ mean for my Terraza?
It means we pre-load the module with your vehicle’s unique VIN and the correct software from GM. This makes the unit plug-and-play, allowing it to work correctly with your specific vehicle’s systems without needing any additional programming from a dealer.
Will this fix a P0700 trouble code?
A P0700 code indicates that the TCM has detected a fault and has requested the check engine light to be turned on. While this module often resolves the root cause (the faulty TCM itself), you should ensure there are no other issues like bad solenoids or wiring problems. In most cases, replacing a failed TCM will clear the P0700 code.
Is this part difficult to install?
For the 2006-2007 Terraza, the TCM is located on the LH strut tower in the engine compartment, which is relatively accessible. Installation involves disconnecting the battery, unplugging the electrical connectors, unbolting the old module, and installing the new one. Most DIY mechanics with basic tools can complete the job in under an hour.
Do I need to send my old part back?
No, there is no core charge for this module. You can keep your old part, which simplifies the process and saves you the hassle and cost of return shipping.
Is this compatible with other GM vehicles?
Yes, this T42 TCM is compatible with a wide array of 2006-2014 GM vehicles equipped with 4-speed automatic transmissions like the 4L60E, 4L65E, and 4L70E. This includes many Chevrolet, GMC, Buick, Pontiac, and Cadillac models.