Restore Smooth, Reliable Shifting to Your 2006-2007 Terraza
If your 2006-2007 Terraza is suffering from erratic shifting, getting stuck in gear, or throwing transmission codes, a faulty Transmission Control Module (TCM) is the most likely culprit. As a technician with over two decades of experience, I’ve seen how a failing TCM can make a reliable family minivan feel unsafe and unpredictable. This replacement T42-style TCM, part number 24240449, is the definitive solution. It arrives pre-programmed to your Terraza’s specific Vehicle Identification Number (VIN), eliminating the need for expensive dealership visits and ensuring a direct, plug-and-play fix right out of the box.
Is Your Terraza’s Transmission Showing These Signs?
A failing TCM is the electronic brain of your transmission. When it malfunctions, the symptoms can range from annoying to dangerous. Here’s what to look for:
- ✔ Unpredictable or harsh gear changes that jolt the vehicle.
- ✔ The transmission feels like it’s slipping or hesitating to engage a gear.
- ✔ Your minivan is stuck in “limp mode,” often locked in 2nd or 3rd gear.
- ✔ The Check Engine Light or a dedicated transmission warning light is on, with Diagnostic Trouble Codes (DTCs) like P0700, P0750, or other solenoid-related faults.
- ✔ A sudden drop in fuel economy or a transmission that seems to be running hotter than usual.
- ✔ Complete loss of communication with the module, leading to a no-shift condition.
Case Study: A Tricky Diagnosis
I once had a 2007 Uplander (which shares a platform with the Terraza) in my bay with an intermittent shifting problem that was driving the owner crazy. It would shift perfectly for days, then suddenly start banging into gear and get stuck in 3rd. There were no hard solenoid codes, just a generic P0700. After checking the wiring and fluid, I suspected the TCM. Heat soak was causing an internal connection to fail intermittently. Installing a new, pre-programmed TCM like this one resolved the issue completely. It’s a common failure point on these GM vans, and this part is the correct fix.
A Straightforward Guide to Installation
For the 2006-2007 Terraza, replacing the TCM is a job most DIYers can handle in under 30 minutes with basic tools. This module is specifically designed for a hassle-free installation, getting your family back on the road safely.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery to prevent electrical shorts and help reset the system.
- Locate the Module: On your Terraza, the TCM is typically found mounted on or near the driver’s side (LH) strut tower in the engine bay.
- Disconnect and Remove: Carefully unclip the electrical connectors. Press the release tabs firmly. Then, unbolt the module from its mounting bracket.
- Install the New TCM: Mount the new module in the same location, secure the bolts, and firmly reconnect the electrical harnesses. You should hear a click as they lock into place.
- Final Steps: Reconnect the battery terminal. While our VIN programming handles the critical setup, it’s good practice to use a basic OBD2 scanner to clear any stored fault codes after the installation is complete.
Verified Vehicle Compatibility
This module is a direct replacement for part number 24240449 and is interchangeable with many other GM service numbers. While it’s a perfect fit for the 2006-2007 Terraza TCM, it also fits a wide range of other GM vehicles. Please verify your specific model and options below.
- TERRAZA 06-07 Transmission; (LH strut tower)
- UPLANDER 06-09 Transmission; (LH strut tower)
- MONTANA 06-09 Transmission; (LH strut tower)
- HHR 06-11 Transmission; (LH engine compartment)
- COBALT 06-10 Transmission; (LH strut tower)
- G6 06-10 Transmission; (LH strut tower)
- IMPALA 06-11 Transmission; (lower air cleaner housing)
- MONTE CARLO 06-07 Transmission; (lower air cleaner housing)
- LUCERNE 06-11 Transmission; (LH engine compartment)
- …and many other GM cars, trucks, and SUVs.
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. We program the module to your vehicle’s VIN before shipping. It arrives ready for installation, saving you the time and expense of a dealership visit.
Is this a difficult part to install myself?
Not at all. For the Terraza, it’s located on the driver’s side strut tower and is accessible with basic hand tools. The entire process typically takes less than 30 minutes.
What is a core charge? Do I need to send my old part back?
There is no core charge for this module. You can keep your old part without any extra fees or hassle.
Will this fix a P0700 trouble code?
A P0700 code is a general fault request from the TCM. While this module often resolves the root cause of a P0700, it’s important to have the vehicle scanned for more specific codes (like P0750-P0758 for solenoids) to confirm the TCM is the issue. In many cases, a faulty TCM is the primary problem.