Restore Smooth, Reliable Shifting to Your 2006-2007 Terraza
If your 2006-2007 Buick Terraza is suffering from erratic shifting, getting stuck in gear, or has an illuminated check engine light, a failing Transmission Control Module (TCM) is the most likely culprit. As a seasoned technician, I’ve seen countless minivans like the Terraza develop frustrating and unpredictable transmission behavior, not because the transmission itself is shot, but because this critical electronic brain has failed. This T42 series TCM, part number 24235753, is the definitive solution to restore the dependable performance your family relies on.
This isn’t just a replacement part; it’s a complete, ready-to-install fix. We pre-program the module to your vehicle’s specific VIN, ensuring it communicates flawlessly with the engine computer and transmission from the moment you plug it in. This eliminates the need for expensive dealership visits for programming, saving you both time and money. By precisely managing shift points, torque converter lockup, and line pressure, this module resolves common issues and prevents the excessive wear and tear on your transmission that a faulty TCM can cause. Get your Terraza back to being the reliable family hauler it was meant to be.
Case Study: A Tricky Diagnosis
A customer brought in their ’07 Terraza, convinced they needed a full transmission rebuild. It was slamming into gear and occasionally wouldn’t shift past 2nd. The quote from another shop was astronomical. I hooked up my scanner and saw a generic P0700 code, but also a few intermittent solenoid circuit faults. Instead of condemning the transmission, I checked the TCM. Sure enough, after swapping in a programmed T42 module, every single issue vanished. The van shifted like new. It was a 30-minute fix that saved the customer thousands and reinforced a key lesson: always check the electronics first.
Is Your Terraza Showing These Transmission Warning Signs?
- âś” Harsh, slamming, or delayed gear engagement.
- âś” Vehicle is stuck in “limp mode” and won’t shift out of 2nd or 3rd gear.
- âś” The Check Engine Light or Transmission Warning Light is on.
- âś” Diagnostic Trouble Codes (DTCs) like P0700, P0750, or other solenoid-related faults are present.
- âś” Inconsistent shifting, flaring between gears, or a sudden loss of power.
- âś” Poor fuel economy directly related to incorrect gear selection.
A Straightforward Guide to Installation
- âś” Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts and to help reset the vehicle’s computer systems.
- âś” Locate the Module: On the 2006-2007 Buick Terraza, the TCM is conveniently located on the driver’s side, mounted to the LH strut tower in the engine bay.
- âś” Disconnect and Remove: Carefully unplug the electrical connectors. Note the tab locations to avoid damage. Then, unbolt the module from its mounting bracket.
- âś” Install the New TCM: Mount the new, pre-programmed module in place and securely fasten the bolts. Reconnect the electrical harnesses, ensuring they click into place.
- âś” 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 codes. A short test drive will confirm the fix.
Verified Vehicle Compatibility
This T42 Transmission Control Module is a direct-fit, programmed solution for the 2006-2007 Buick Terraza. It is also compatible with a wide range of other General Motors vehicles. While this module fits the models listed below, always confirm your part number (24235753) or contact us with your VIN to guarantee perfect fitment.
- Buick: Terraza (06-07), Allure, LaCrosse, Lucerne, Rainier, Rendezvous
- Chevrolet: Avalanche, Cobalt, Colorado, Express, HHR, Impala, Malibu, Monte Carlo, Silverado, SSR, Suburban, Tahoe
- GMC: Canyon, Envoy, Savana, Sierra, Yukon
- Pontiac: G5, G6, Grand Prix, Pursuit, Montana
- Saturn: Aura, Ion, Vue
- Hummer: H3
- Saab: 9-7X
Frequently Asked Questions
Do I need to take this part to a dealer for programming?
No. This module arrives pre-programmed to your vehicle’s VIN. It is a plug-and-play solution that requires no additional programming or flashing. Just install it and you’re ready to go.
What is the warranty on this 2006-2007 Terraza TCM?
This part is backed by our comprehensive one-year, unlimited mileage warranty, giving you peace of mind with your purchase.
Is this part difficult for a DIYer to install?
Not at all. For the Buick Terraza, the TCM is located on the driver’s side strut tower, making it one of the easier modules to access. With basic hand tools, most DIY enthusiasts can complete the job in under 30 minutes.
Will this fix a P0700 trouble code?
A P0700 code is a general fault request from the TCM to the main engine computer (PCM) to turn on the check engine light. While this module often resolves the underlying issue causing the P0700, it’s important to scan for more specific transmission codes (like P07xx) to confirm the diagnosis.
What makes this better than a used part from a junkyard?
A used part carries the same risk of failure as your old one and will not be programmed for your specific vehicle, leading to compatibility issues. Our module is tested for reliability, loaded with the latest GM software for your VIN, and backed by a warranty.