End Frustrating Shifting Problems in Your Terraza
If your 2006-2007 Terraza is suffering from harsh shifting, getting stuck in gear, or throwing transmission-related check engine lights, you’re not alone. Over my 20+ years in the shop, I’ve seen countless GM vehicles with these exact issues, and the culprit is almost always a failing Transmission Control Module (TCM). This isn’t just an annoyance; it’s a reliability issue that can leave you stranded. This T42 series TCM, part number 24239224, is the definitive, hassle-free solution to restore your minivan’s smooth and predictable performance.
The TCM is the brain of your automatic transmission, controlling every shift point, managing torque converter lockup, and monitoring for problems. When it fails, communication breaks down, leading to the erratic behavior you’re experiencing. Our module is a direct-fit replacement, but with one critical advantage: it arrives at your door fully programmed to your vehicle’s specific VIN. This means you can skip the expensive and time-consuming trip to the dealership for programming. It’s a true plug-and-play fix designed for both professional mechanics and DIY-savvy owners.
A Technician’s Notebook
I remember a customer with a 2007 Uplander (which uses the same platform and TCM as the Terraza) who was at his wit’s end. The van would slam into gear and was stuck in limp mode, making it unsafe for his family. He was quoted over $800 at the dealership for a new module and programming. I recommended one of our VIN-programmed units. He installed it himself in his driveway in under 30 minutes using basic tools. The van drove perfectly afterward, and he saved hundreds of dollars. That’s the power of a ready-to-install, quality part.
Is Your Minivan Showing These Symptoms?
A failing TCM will give you clear warning signs. If you’re experiencing any of the following, it’s highly likely your module needs replacement. A faulty 2006-2007 Terraza TCM is a common point of failure that can be easily resolved.
- âś” Unpredictable, hard, 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 on.
- âś” Diagnostic Trouble Codes (DTCs) are present, such as P0700, P0750, or other solenoid-related faults.
- âś” Failure to upshift or downshift correctly.
- âś” Noticeable decrease in fuel economy.
- âś” Complete loss of communication with the transmission.
A Straightforward Guide to Installation
One of the best parts about this solution is how simple it is to install. For the 2006-2007 Terraza, the TCM is conveniently located and accessible for a quick swap. You don’t need a vehicle lift or specialized equipment.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts and help reset the system.
- Locate the Module: On your Terraza, the TCM is found at the driver’s side (LH) strut tower in the engine compartment. It’s a silver box with electrical connectors.
- Disconnect and Remove: Carefully unplug the electrical harnesses. Then, unbolt the module from its mounting bracket.
- Install the New TCM: Mount your new, pre-programmed TCM in the same location. Securely plug in the electrical connectors—they will only fit one way.
- 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.
Guaranteed Vehicle Compatibility
This module is a direct replacement for part number 24239224 and is interchangeable with several other service numbers. While this page focuses on the 2006-2007 Terraza TCM, it also fits a wide range of other GM vehicles. Please verify your vehicle is on the list below.
Fitment Information:
- 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)
- ALLURE 06-09 Transmission; (lower air cleaner housing)
- COBALT 06-10 Transmission; (LH strut tower)
- DTS 06-11 Transmission; (RH front engine compartment)
- G5 07-10 Transmission; (LH strut tower)
- G6 06-10 Transmission; (LH strut tower)
- GRAND PRIX 06-08 Transmission; (lower air cleaner housing)
- HHR 06-11 Transmission; (LH engine compartment)
- IMPALA 06-11 Transmission; (lower air cleaner housing)
- ION 06-07 Transmission; (behind LH strut tower)
- LACROSSE 06-09 Transmission; (lower air cleaner housing)
- LUCERNE 06-11 Transmission; (LH engine compartment)
- MALIBU 06-10 Transmission; (LH frame rail)
- MONTE CARLO 06-07 Transmission; (lower air cleaner housing)
- And many more GM trucks, vans, and SUVs.
Do I need to program this module?
Do I need to program this module?
No. This is the biggest benefit of our service. We program the module to your vehicle’s VIN before shipping it. It arrives ready for a plug-and-play installation, saving you a trip to the dealership.
Where is the TCM on a 2007 Terraza?
The Transmission Control Module on the 2006-2007 Terraza is located in the engine bay, mounted to the driver’s side (LH) strut tower.
Will this fix my transmission problems for good?
If your vehicle’s symptoms and diagnostic codes point to a faulty TCM, this part is the correct and reliable solution. It’s built to OEM standards and addresses the common failure points of the original module, restoring proper transmission function.
Do I have to send my old part back?
No, there is no core charge for this part. You can keep or dispose of your old module without any hassle.
What if I have questions during installation?
We have expert support available to help you. We’re committed to ensuring you have a successful repair, from diagnosis to installation.