Restore Smooth, Reliable Shifting to Your Buick Terraza
If your 2006-2007 Buick Terraza is suffering from harsh shifts, getting stuck in gear, or throwing transmission codes, the problem is very likely a failed Transmission Control Module (TCM). As an automotive technician with over two decades of diagnostic experience, I’ve seen hundreds of these T42 modules cause headaches for vehicle owners. The electronics inside are susceptible to failure from years of heat and vibration, leading to communication breakdowns that your minivan’s transmission relies on to function properly. Don’t let a faulty module sideline your family vehicle or lead to a misdiagnosis of a much more expensive transmission failure.
This replacement TCM, part number 24255280, is the definitive solution. We take the guesswork and extra cost out of the repair by pre-programming the module to your Terraza’s specific Vehicle Identification Number (VIN). This means it arrives ready for a true plug-and-play installation, restoring the precise, factory-intended communication between your engine and transmission. Get your minivan back to being the dependable vehicle you need it to be.
Case Study: The Terraza That Didn’t Need a New Transmission
A customer brought in their ’07 Terraza with a classic complaint: it would randomly slam into gear and the check engine light was on. Another shop had quoted them over $3,000 for a transmission rebuild, assuming the worst. I pulled the codes and saw a P0700 (Transmission Control System Malfunction) and a few solenoid circuit codes. From experience, I know this combination on GM vehicles often points directly to the TCM, not internal mechanical failure. We ordered a VIN-programmed module, I swapped it out in under 20 minutes, cleared the codes, and the van shifted perfectly. The customer saved thousands and drove away with a reliable vehicle, all thanks to a correct diagnosis and the right part.
Is Your Terraza Exhibiting These Transmission Issues?
A failing TCM can manifest in several ways. If you’re experiencing any of the following, this module is the likely solution for your 2006-2007 Terraza TCM problems:
- ✔ Harsh, banging, or erratic gear shifts.
- ✔ Vehicle is stuck in “limp mode” (usually 2nd or 3rd gear).
- ✔ Check Engine Light or Transmission Warning Light is illuminated.
- ✔ Diagnostic Trouble Codes (DTCs) are present, such as P0700, P0750, or other solenoid-related faults.
- ✔ Delayed engagement when shifting from Park to Drive or Reverse.
- ✔ A noticeable decrease in fuel economy.
A Straightforward Guide to Your TCM Installation
One of the best features of this part is how simple the installation is, making it a perfect job for a DIYer. For the Buick Terraza, the TCM is located on the driver’s side of the engine bay, attached to the strut tower. You can have this swapped in about 30 minutes.
- Safety First: Always disconnect the negative terminal on your vehicle’s battery before starting any electronic repair.
- Locate the Module: Open the hood and find the TCM on the driver’s side (LH) strut tower.
- Disconnect and Remove: Carefully unplug the electrical connectors. Use a socket wrench to remove the bolts holding the old module in place.
- Install the New TCM: Mount the new, pre-programmed module in the same location and tighten the bolts. Reconnect the electrical harnesses securely.
- Final Steps: Reconnect the battery terminal. While the module is plug-and-play, it’s good practice to use a basic OBD2 scan tool to clear any stored fault codes from the vehicle’s memory.
Verified Vehicle Compatibility List
While this part is the correct solution for the 2006-2007 Buick Terraza, it is also compatible with a wide range of other General Motors vehicles. This module is interchangeable with part numbers 24252114, 24234503, 24230461, and others. Below is a partial list of confirmed applications:
- Buick Terraza: 2006-2007 (Transmission; LH strut tower)
- Buick Allure/LaCrosse: 2006-2009 (Transmission; lower air cleaner housing)
- Chevrolet Cobalt/HHR/Impala: 2006-2011 (Varies: LH strut tower or lower air cleaner housing)
- Chevrolet Silverado/Tahoe: 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)
- Saturn Aura/Vue: 2007-2010 (Transmission; LH frame rail or front engine compartment)
Frequently Asked Questions About the 2006-2007 Terraza TCM
Frequently Asked Questions
What does ‘VIN Programmed’ actually mean for me?
It means the module arrives at your door already loaded with the correct software for your Terraza’s specific configuration. This allows it to work perfectly upon installation without requiring a trip to a mechanic or dealer for expensive programming.
Will this fix a P0700 check engine light code?
In many cases, yes. The P0700 code is a general fault code indicating the TCM has detected a problem. If the TCM itself is the source of the failure, replacing it with this new module will resolve the root cause and allow the code to be cleared.
Do I need any special tools for this installation?
No special tools are required. A basic socket set to remove the mounting bolts and disconnect the battery is all you’ll need. The entire process is designed to be straightforward for anyone with basic mechanical skills.
Is there a core charge for my old part?
No, we do not require you to send back your old, faulty module. There is no core charge, which simplifies the process and saves you the hassle and cost of return shipping.
What kind of warranty comes with this module?
This transmission control module is backed by our one-year warranty, giving you peace of mind that you’re installing a quality, dependable part built to last.