End Frustrating Shifting Problems in Your Buick Terraza
If your 2006-2007 Buick Terraza is suffering from harsh shifts, getting stuck in gear, or throwing transmission-related check engine lights, the problem is often not the transmission itself, but its electronic brain: the Transmission Control Module (TCM). As a technician with over two decades of experience, I’ve seen countless drivers worry about costly transmission rebuilds when the real issue was a faulty TCM. This VIN-programmed T42 series module is the direct, reliable solution to restore your minivan’s performance and give you peace of mind on the road.
This isn’t just a replacement part; it’s a complete fix. We program the module to your vehicle’s specific VIN before shipping, ensuring it communicates flawlessly with your Terraza’s systems right out of the box. This eliminates the need for an expensive trip to the dealership for programming, saving you time and money. By precisely managing shift points, torque converter lockup, and line pressure, a new 2006-2007 Terraza TCM will make your transmission operate as smoothly as it did from the factory.
From the Diagnostic Bay
I remember a family who brought their minivan into the shop, a 2007 Terraza, convinced they needed a new transmission. It was shifting violently and occasionally wouldn’t shift out of 2nd gear—a classic limp mode symptom. They were quoted over $3,000 for a rebuild at another shop. I hooked up my scan tool and immediately saw a P0700 code, along with several solenoid circuit faults. These codes pointed directly to an internal failure in the TCM, not a mechanical issue. We installed a VIN-programmed module, cleared the codes, and had them test drive it. The van shifted perfectly. They saved thousands of dollars by correctly diagnosing the problem, a testament to replacing the right part the first time.
Is Your Terraza Showing These Transmission Warning Signs?
- ✔ Unpredictable or harsh gear shifts that slam into place.
- ✔ 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 on the dash.
- ✔ Diagnostic Trouble Codes (DTCs) are present, such as P0700, P0750, or other solenoid-related codes.
- ✔ Delayed engagement when shifting from Park to Drive or Reverse.
- ✔ A noticeable decrease in fuel economy due to inefficient shifting.
DIY Installation: Get Your Minivan Back on the Road Fast
Replacing the 2006-2007 Terraza TCM is a straightforward job that most DIYers can complete in under 30 minutes with basic hand tools. No complex procedures are required.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electronic work.
- Locate the Module: On the 2006-2007 Buick Terraza, the TCM is typically 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 mounting bolts holding the old module in place.
- Install the New Module: Mount your new, pre-programmed TCM in the same location and secure it with the bolts. Reconnect the electrical harnesses firmly.
- Final Steps: Reconnect the battery terminal. While the module is plug-and-play, it’s best practice to use a basic OBD2 scan tool to clear any stored fault codes from the vehicle’s memory.
Confirmed Vehicle Fitment List
This T42 Transmission Control Module, part number 24241806, is a direct replacement for a wide range of General Motors vehicles. Please verify your model and location notes below.
This part will fit these makes and models with these options:
- TERRAZA 06-07 Transmission; (LH strut tower)
- ALLURE 06-09 Transmission; (lower air cleaner housing)
- AURA 07-09 Transmission; (LH frame rail front)
- AVALANCHE 1500 07-08 Transmission; (next to battery)
- CANYON 08-12 Transmission; (RH rear engine compartment)
- COBALT 06-10 Transmission; (LH strut tower)
- COLORADO 08-12 Transmission; (RH rear engine compartment)
- DTS 06-11 Transmission; (RH front engine compartment)
- ENVOY 06-07 Transmission; (LH engine compartment), (8 cylinder)
- ENVOY 08-09 Transmission; (LH engine compartment)
- ENVOY XL 06 Transmission; (LH engine compartment), (8 cylinder)
- EXPRESS 1500 VAN 06-14 Transmission; (RH engine compartment)
- EXPRESS 2500 VAN 06-14 Transmission; (RH engine compartment)
- EXPRESS 3500 VAN 06-14 Transmission; (RH 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)
- HUMMER H3 08-10 Transmission; (RH rear 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 06-07 Transmission; (4.6L), (LH engine compartment)
- LUCERNE 08-11 Transmission; (LH engine compartment)
- MALIBU 06-10 Transmission; (LH frame rail)
- MONTE CARLO 06-07 Transmission; (lower air cleaner housing)
- MONTANA 06-09 Transmission; (LH strut tower)
- PURSUIT 06 Transmission; (LH strut tower)
- RAINIER 06-07 Transmission
- RENDEZVOUS 06-07 Transmission; (air cleaner box)
- SAAB 9-7X 06-09 Transmission; (LH engine compartment)
- SAVANA 1500 VAN 06-14 Transmission; (RH engine compartment)
- SAVANA 2500 VAN 06-14 Transmission; (RH engine compartment)
- SAVANA 3500 VAN 06-14 Transmission; (RH engine compartment)
- SIERRA 1500 PICKUP 07 Transmission; (new style, smooth door skin), (next to battery)
- SIERRA 1500 PICKUP 08 Transmission; (next to battery)
- SIERRA 1500 PICKUP 09-13 Transmission; (next to battery), w/o hybrid option
- SIERRA 2500 PICKUP 07 Transmission; new style (smooth door skin), 6.0L, (next to battery)
- SILVERADO 1500 PICKUP 07 Transmission; (new style, smooth door skin), (next to battery)
- SILVERADO 1500 PICKUP 08 Transmission; (next to battery)
- SILVERADO 1500 PICKUP 09-13 Transmission; (next to battery), w/o hybrid option
- SILVERADO 2500 PICKUP 07 Transmission; new style (smooth door skin), 6.0L, (next to battery)
- SSR 05-06 Transmission; (front LH frame)
- SUBURBAN 1500 07-08 Transmission; (next to battery)
- TAHOE 07 Transmission; (next to battery)
- TAHOE 08-09 Transmission; (next to battery), w/o auxiliary oil cooler pump
- TRAILBLAZER 06-07 Transmission; (LH engine compartment), (8 cylinder)
- TRAILBLAZER 08-09 Transmission; (LH engine compartment)
- TRAILBLAZER EXT 06 Transmission; (LH engine compartment), (8 cylinder)
- UPLANDER 06-09 Transmission; (LH strut tower)
- VUE 07-08 Transmission; 2.4L, (LH front engine compartment)
- VUE 09 Transmission; 2.4L, w/hybrid, LH side front engine compartment, (shift control)
- VUE 09 Transmission; 2.4L, w/o hybrid; (LH front engine compartment)
- VUE 10 Transmission
- YUKON 07 Transmission; (next to battery)
- YUKON 08 Transmission; (next to battery), w/o auxiliary oil cooler control
- YUKON 09 Transmission; (next to battery), w/o auxiliary oil cooler pump
- YUKON XL 1500 07-08 Transmission; (next to battery)
Frequently Asked Questions About This 2006-2007 Terraza TCM
Frequently Asked Questions
Do I need to do any programming myself?
No. This module comes fully programmed to your vehicle’s VIN. It is a plug-and-play solution that requires no additional flashing or setup at a dealership.
Is there a core charge for my old part?
There is no core charge required for this module. You can keep or dispose of your old part without the hassle of returning it.
What is the warranty on this TCM?
This transmission control module is backed by our one-year warranty, covering any defects in materials or workmanship for your complete confidence.
Will this fix a P0700 check engine light code?
Yes, a P0700 code is a general transmission fault request. If the underlying cause is a failed TCM or related solenoid circuits that the TCM controls, replacing it with this module will resolve the issue and allow the code to be cleared.
What tools do I need for installation?
You will typically only need a basic socket set to remove the mounting bolts and a tool to disconnect the battery terminal. A standard OBD2 scan tool is also recommended to clear any stored codes after the installation is complete.