Restore Smooth, Reliable Shifting to Your Minivan
If your 2006-2007 Terraza is suffering from jarring shifts, delayed gear engagement, or is stuck in limp mode, a failing Transmission Control Module (TCM) is the most likely culprit. As a technician with over two decades of experience, I’ve seen how a faulty TCM can make a reliable family vehicle feel unsafe and unpredictable. This direct-fit T42 Transmission Control Module, part number 24235754, is the definitive solution to restore your transmission’s performance and your peace of mind. It arrives pre-programmed to your vehicle’s specific VIN, eliminating the need for expensive dealership visits and ensuring a seamless, plug-and-play installation.
Case Study: The Terraza That Wouldn’t Shift
A customer brought in their ’07 Terraza with a classic complaint: intermittent, bone-jarring shifts and a persistent transmission warning light. They had already replaced a shift solenoid at another shop, but the problem returned within a week. My scan tool pulled a P0700 (Transmission Control System Malfunction). Instead of just chasing solenoid codes, I checked the TCM communication data. I saw erratic voltage readings and intermittent data loss, classic signs of internal circuit failure in the module itself. After installing our VIN-programmed 2006-2007 Terraza TCM, the shifting became factory-smooth, all codes cleared, and the customer was thrilled to have their dependable van back. This is why addressing the core electronic controller is often the correct first-time fix.
Is Your Terraza Exhibiting These Transmission Issues?
A failing TCM doesn’t just degrade performance; it can be a serious safety concern. If you’re noticing any of the following symptoms, it’s time to inspect your transmission module. Replacing a faulty 2006-2007 Terraza TCM can prevent further, more expensive damage to your transmission’s mechanical components.
- ✔ Harsh, slamming shifts or erratic gear changes.
- ✔ The vehicle is stuck in a single gear (limp mode) and won’t shift up or down.
- ✔ Check Engine Light or Transmission Warning Light is illuminated with DTCs like P0700, P0750, or other solenoid-related codes.
- ✔ Significant delay when shifting from Park into Drive or Reverse.
- ✔ Poor acceleration and a noticeable drop in fuel economy.
- ✔ The transmission seems to slip out of gear while driving.
A Straightforward Guide to Installation
One of the best features of this module is its ease of installation, making it a perfect job for a DIY enthusiast. Since it comes pre-programmed, you won’t need any special diagnostic tools for setup. For the Terraza, the TCM is conveniently located and accessible.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts and to help reset the system.
- Locate the Module: On your 2006-2007 Terraza, you will find the TCM mounted on the driver’s side strut tower in the engine compartment.
- Disconnect and Remove: Carefully unplug the electrical connectors from the old module. Then, unbolt the module from its mounting bracket.
- Install the New TCM: Mount the new module securely onto the bracket and firmly reconnect the electrical harnesses. Ensure they click into place.
- Final Steps: Reconnect the battery terminal. Start the vehicle and allow it to idle for a few minutes. If you have a basic scan tool, it’s good practice to clear any stored fault codes.
Verified Vehicle Compatibility
This T42 TCM is a direct replacement for part number 24235754 and other interchangeable service numbers. While it is the specified part for your minivan, it also fits a wide range of other General Motors vehicles. Please verify your part number before ordering.
Fits 2006-2007 Terraza with the TCM located on the LH strut tower.
Also compatible with models including: Chevrolet Cobalt, HHR, Impala, Malibu, Monte Carlo, Silverado, Tahoe, Express; GMC Canyon, Envoy, Sierra, Yukon, Savana; Buick Allure, LaCrosse, Lucerne, Rainier; Pontiac G5, G6, Grand Prix; Saturn Aura, Ion, Vue; Cadillac DTS; Hummer H3; and Saab 9-7X. A detailed fitment list is available on this page.
Frequently Asked Questions
What does “VIN Programmed” mean for me?
It means we load your vehicle’s specific Vehicle Identification Number (VIN) and the latest GM software onto the module before shipping. This ensures it communicates perfectly with your vehicle’s engine computer and other systems right out of the box, with no extra programming required.
Do I need to send my old TCM back?
No, there is no core charge for this part. You can keep your old module or dispose of it, saving you the hassle and cost of return shipping.
Will this fix a P0700 trouble code?
A P0700 code is a general fault code indicating the TCM has detected a problem. While this module often resolves the root cause of a P0700, it’s important to ensure there are no underlying wiring or solenoid issues. However, in many cases, a faulty TCM is the primary trigger for this code.
Is this an OEM part?
This is a high-quality replacement part built to meet or exceed original equipment manufacturer (OEM) specifications for performance and reliability. It is backed by our one-year warranty.