Restore Your Terraza’s Drivability with a Programmed Transmission Control Module
If your 2006-2007 Buick Terraza is suffering from erratic shifting, getting stuck in gear, or has the check engine light on with transmission codes, you’re likely dealing with a failed Transmission Control Module (TCM). As a seasoned technician, I’ve seen countless GM vehicles, including the Terraza, sidelined by these exact issues. A faulty TCM doesn’t just make for a frustrating drive; it can compromise safety and lead to more expensive transmission damage if ignored. This T42 TCM, part number 24240400, is the definitive solution, arriving pre-programmed to your van’s specific VIN for a true plug-and-play repair.
Case Study: A Tricky Diagnosis
A customer brought in a 2007 GM minivan with symptoms that were all over the place. One day it would shift perfectly, the next it would slam into gear and get stuck in limp mode. They had already replaced two shift solenoids with no luck. After connecting my scan tool, I noticed intermittent communication loss with the TCM. Instead of throwing more parts at it, we inspected the module itself. These T42 units, especially when located near the strut tower like on the Terraza, are exposed to constant vibration and heat cycles. This can cause internal solder joints to fail over time, leading to the exact intermittent electrical faults the customer was experiencing. A new, programmed 2006-2007 Terraza TCM solved the problem permanently, saving them from a costly transmission rebuild.
Is Your Terraza Exhibiting These Transmission Faults?
A failing TCM will give you clear warning signs. If you’re experiencing any of the following, it’s time for a replacement. Ignoring them can lead to further damage to your transmission’s mechanical components.
- âś” Harsh, jerky, or delayed gear shifts.
- âś” Vehicle is stuck in “limp mode” (usually 2nd or 3rd gear).
- âś” Check Engine Light or Transmission Warning Light is illuminated.
- âś” Diagnostic Trouble Codes (DTCs) are present, such as P0700 (Transmission Control System Malfunction), P0750, P0753, P0758 or other solenoid-related faults.
- âś” The transmission refuses to upshift or downshift properly.
- âś” A noticeable drop in fuel economy.
A Straightforward Guide to Installation
One of the best features of this module is its simple, DIY-friendly installation. You don’t need a trip to the dealership or specialized programming tools. For your 2006-2007 Terraza TCM, the module is located at the driver’s side strut tower. The entire process takes less than 30 minutes.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent electrical shorts and help reset the system.
- Locate the Old TCM: Find the module on the driver-side (LH) strut tower in the engine bay.
- Disconnect and Remove: Carefully unplug the electrical connectors. Then, unbolt the module from its mounting bracket.
- Install the New Module: Bolt the new, pre-programmed TCM into place and securely reconnect the electrical harnesses.
- Final Steps: Reconnect the battery terminal. While the module is plug-and-play, it’s good practice to use a basic OBD2 scanner to clear any stored fault codes from the vehicle’s memory.
Verified Fitment for Your Vehicle
This T42 Transmission Control Module is a direct-fit replacement for your van and is also compatible with a wide range of other GM vehicles. It is interchangeable with part numbers 24242391, 24234503, 24252114, and more. While this list is extensive, this part is guaranteed to be the correct, programmed solution for the following:
- TERRAZA 2006-2007 (Transmission; LH strut tower)
- UPLANDER 2006-2009 (Transmission; LH strut tower)
- MONTANA 2006-2009 (Transmission; LH strut tower)
- RENDEZVOUS 2006-2007 (Transmission; air cleaner box)
- And many other GM cars, trucks, and SUVs from 2006-2014.
By ordering our pre-programmed 2006-2007 Terraza TCM, you are choosing a reliable, cost-effective repair that restores your vehicle’s performance and gets your family safely back on the road. Don’t let a small electronic part cause a major headache—get the right part, programmed and ready to install, right here.
Why is a VIN-programmed module important?
Programming the module to your vehicle’s specific VIN ensures it has the correct software and shift calibrations for your Terraza’s exact configuration. This eliminates compatibility issues and guarantees optimal transmission performance right out of the box, avoiding a mandatory and expensive trip to the dealership for programming.
Will this fix my transmission that is stuck in one gear?
Yes, in most cases. A common failure mode for the TCM is to put the transmission into “limp mode” to protect it from further damage. This is often caused by an internal electronic fault in the module. Replacing it with this pre-programmed unit is the standard repair for that symptom.
Do I need any special tools for this installation?
No. Basic hand tools, like a socket set to remove the mounting bolts, are all that’s required. The most important part of the process is ensuring the battery is disconnected before you begin.
Will this clear a P0700 trouble code?
A P0700 code simply means the TCM has detected a fault and has requested the Check Engine Light to be turned on. The actual problem is indicated by other, more specific codes stored in the TCM. This module will fix the root cause of those codes, and once installed and old codes are cleared, the P0700 code should not return.
Is there a core charge for my old part?
No, there is no core charge. You are not required to send your old, faulty module back to us, saving you time and shipping costs.