Restore Smooth, Reliable Shifting to Your Terraza
Is your 2006-2007 Terraza suffering from harsh shifting, delayed gear engagement, or a frustrating check engine light? These are classic signs of a failing Transmission Control Module (TCM). Over my 20+ years in automotive diagnostics, I’ve seen how a faulty TCM can sideline a perfectly good vehicle, causing unpredictable performance and safety concerns. This VIN-programmed T42 TCM, part number 24239224, is the definitive solution to get your minivan back to driving like new, without the excessive cost and hassle of a dealership visit.
The TCM is the brain of your automatic transmission, responsible for every gear change, torque converter lockup, and line pressure adjustment. When it fails, communication breaks down, leading to the problems you’re likely experiencing. Our module is programmed specifically to your vehicle’s VIN before it ships, ensuring it integrates perfectly with your Terraza’s systems right out of the box. This eliminates the need for expensive on-vehicle programming, making it a straightforward fix for both DIY mechanics and professional shops.
Case Study: A Tricky Diagnosis
A customer brought in a 2007 Terraza with an intermittent shifting problem. It would sometimes slam into gear or refuse to upshift, but only after driving for 20 minutes. The local shop had already replaced two shift solenoids without success. After connecting my scan tool, I noticed erratic voltage readings from the TCM, but only once the module itself got hot. Heat soak was causing an internal circuit failure—a common issue. We installed one of our VIN-programmed TCMs, and the problem was solved permanently. It wasn’t the transmission’s mechanical parts; it was the electronic controller all along.
Is Your Terraza Showing These Telltale Symptoms?
- ✔ Harsh, banging, or erratic gear shifts.
- ✔ The vehicle is stuck in “limp mode” (usually 2nd or 3rd gear).
- ✔ Check Engine Light or Transmission Warning Light is illuminated.
- ✔ Diagnostic Trouble Codes (DTCs) are present, such as P0700 (Transmission Control System Malfunction), P0750-P0758 (Shift Solenoid Faults), or other transmission-related codes.
- ✔ Failure to shift into higher or lower gears.
- ✔ A noticeable decrease in fuel economy.
- ✔ The transmission feels like it’s slipping between gears.
A Straightforward Guide to Installation
Replacing the 2006-2007 Terraza TCM is a job most owners can handle in their own driveway in under 30 minutes. No specialized tools are required.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent electrical shorts and reset the system.
- Locate the Module: On the Terraza, the TCM 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. Use a socket wrench to remove the bolts holding the old module in place.
- Install the New TCM: Mount your new, VIN-programmed TCM and tighten the bolts. Reconnect the electrical connectors, ensuring they click securely into place.
- Final Steps: Reconnect the battery terminal. While the module is plug-and-play, it’s good practice to use a basic scan tool to clear any stored fault codes from the vehicle’s memory.
Verified Vehicle Compatibility
This module is a direct-fit replacement for the 2006-2007 Terraza TCM and is also compatible with a wide range of other General Motors vehicles. It is interchangeable with part numbers 24252114, 24234503, 24230461, 24234274, 24238856, and more.
Frequently Asked Questions
Do I need to take my vehicle to a dealer for programming?
No. This Transmission Control Module is pre-programmed to your vehicle’s VIN before shipping. It arrives ready for installation, saving you time and money. Simply provide your VIN at checkout.
What is the warranty on this part?
We stand behind our products with a one-year, hassle-free warranty. This module is built to meet or exceed OEM specifications for long-lasting reliability.
Is there a core charge for my old part?
No, there is no core charge. You can keep your old part or dispose of it at your convenience without the need to ship it back to us.
Will this fix a P0700 trouble code?
A P0700 code indicates a general fault request from the TCM. While a failing TCM is a very common cause for this code, it’s essential to check for other specific transmission codes that may accompany it. In a high percentage of cases, replacing a faulty TCM will resolve the P0700 code and the underlying issue.