End Your Terraza’s Shifting Nightmares
If your 2006-2007 Terraza is suffering from harsh shifts, getting stuck in gear, or throwing transmission codes, you’re not just dealing with an annoyance—you’re facing a common failure point: the Transmission Control Module (TCM). As the electronic brain of your automatic transmission, a failing TCM can make driving unpredictable and frustrating. This replacement T42 TCM, part number 24241806, is the definitive solution, arriving pre-programmed to your vehicle’s VIN for a hassle-free, direct-fit installation that restores the smooth, reliable performance you depend on.
From the Diagnostic Bay: The Misleading Solenoid Code
I remember a 2007 Terraza that came into my shop. The owner had already replaced two shift solenoids based on a P0750-range code, but the erratic shifting and limp mode persisted. After a quick check of the wiring harness, my experience pointed straight to the TCM. These modules, especially the T42 generation, are notorious for internal circuit board failures that manifest as solenoid faults. We installed a VIN-programmed module, and in less than an hour, the van was shifting perfectly. The customer saved hundreds on further diagnostic guesswork and unnecessary parts. This is why a quality, correctly programmed 2006-2007 Terraza TCM is often the first and final fix.
Is Your Terraza Exhibiting These Transmission Issues?
A faulty TCM can cause a wide range of symptoms that are often misdiagnosed. If you’re experiencing any of the following, this module is your likely solution:
- âś” Harsh, slamming shifts or delayed gear engagement.
- âś” Vehicle is stuck in “limp mode” (usually 2nd or 3rd gear).
- âś” The Check Engine Light or transmission warning light is on.
- âś” Diagnostic Trouble Codes (DTCs) are present, such as P0700 (Transmission Control System Malfunction) or various solenoid-specific codes (P0751, P0756, etc.).
- âś” Inability to upshift or downshift, leading to poor acceleration and fuel economy.
- âś” Complete loss of communication with the transmission module.
A Straightforward Installation Guide for Your Terraza
One of the biggest advantages of this module is its simple, plug-and-play installation. Because it arrives programmed to your VIN, you can perform the replacement right in your driveway, saving a costly trip to the dealership. For the 2006-2007 Terraza, the process is particularly easy.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts and to help reset the system’s adaptive memory.
- Locate the TCM: On your Terraza, the Transmission Control Module is conveniently located on the driver’s side of the engine bay, mounted to the LH strut tower.
- Disconnect and Remove: Carefully unplug the electrical connectors from the old module. Then, unbolt the module from its mounting bracket.
- Install the New Module: Mount your new, pre-programmed TCM onto the bracket and securely reconnect the electrical connectors. Ensure they click into place.
- Final Steps: Reconnect the battery terminal. Start the vehicle and let it idle for a few minutes. It’s a good practice to use a basic OBD2 scanner to clear any stored fault codes after the installation is complete.
Verified Fitment for Your Vehicle
This module is a direct replacement for part number 24241806 and other interchangeable numbers. While it is guaranteed to fit the specified models below, this listing is specifically for the 2006-2007 Terraza TCM. Please provide your VIN upon checkout to ensure perfect programming.
- TERRAZA 06-07 Transmission; (LH strut tower)
- UPLANDER 06-09 Transmission; (LH strut tower)
- MONTANA 06-09 Transmission; (LH strut tower)
- RENDEZVOUS 06-07 Transmission; (air cleaner box)
- And many other GM cars, trucks, and SUVs from 2006-2014.
Do I need to take my van to the dealer for programming?
Do I need to take my van to the dealer for programming?
No. This module comes fully programmed to your vehicle’s specific VIN. This makes it a true plug-and-play solution, eliminating the need for expensive dealership programming or special tools.
What is a T42 TCM?
The T42 is the specific generation of Transmission Control Module used by General Motors in a wide range of vehicles, primarily with 4-speed automatic transmissions like the 4L60E and 4T65E. It is the electronic controller responsible for all shifting operations.
Will this fix a P0700 trouble code?
A P0700 code is a general fault request from the TCM to the main engine computer (ECM) to turn on the check engine light. While this module often resolves the root cause that triggers a P0700, it’s important to scan for other, more specific transmission codes (like P07xx) to confirm the diagnosis.
Is there a core charge for my old part?
No, there is no core charge required for this part. You can keep or dispose of your old module without the hassle of returning it.