Restore Peak Transmission Performance in Your Buick Rainier
Are you experiencing frustrating and unpredictable shifting in your 2006-2007 Buick Rainier? Issues like harsh gear changes, getting stuck in limp mode, or an illuminated check engine light are common signs of a failing Transmission Control Module (TCM). This critical component is the brain of your automatic transmission, managing everything from shift points to torque converter lockup. When it fails, it can make your vehicle unreliable and unsafe to drive. This genuine OEM-quality T42 TCM, service part number 24235732, is the definitive solution, pre-programmed to your vehicle’s specific VIN for a true plug-and-play installation.
From the Diagnostic Bay
We had a 2007 GMC Envoy (which shares the same platform as the Rainier) come into the shop with a classic complaint: ‘It shifts hard sometimes, and yesterday it wouldn’t shift out of 2nd gear.’ The customer had already replaced a shift solenoid with no luck. A quick scan showed a P0700 code and several intermittent solenoid circuit faults. Instead of chasing electrical gremlins for hours, we inspected the TCM. We identified it as the culprit based on common failure patterns for the T42 module. Installing a VIN-programmed replacement like this one cleared all the codes instantly. The customer was back on the road with a perfectly shifting transmission in under an hour, saving hundreds in diagnostic fees and avoiding a costly trip to the dealership.
Signs You Need a New 2006-2007 Rainier Transmission Module
A failing TCM can manifest in various ways, often mimicking other transmission problems. If your vehicle is exhibiting any of the following symptoms, a faulty module is a likely cause. Replacing your 2006-2007 Rainier Transmission Module can resolve these issues and restore your vehicle’s drivability.
- ✔ Harsh, erratic, or delayed gear shifting.
- ✔ Vehicle is stuck in a single gear (limp mode).
- ✔ Check Engine Light or Transmission Warning Light is on.
- ✔ Diagnostic Trouble Codes (DTCs) such as P0700, P0750, or other solenoid-related codes are present.
- ✔ Inability to upshift or downshift properly.
- ✔ Noticeable decrease in fuel economy.
- ✔ Complete loss of communication with the transmission module.
Plug-and-Play Solution with VIN Programming
The biggest challenge with replacing modern electronic modules is the need for expensive dealership programming. We eliminate that step completely. Simply provide your vehicle’s VIN during checkout, and we will program this module with the latest GM software specific to your Buick Rainier. This ensures that all factory shift strategies and communication protocols are correctly loaded, making the installation process as simple as swapping the part. No extra tools, no software subscriptions, and no trips to the dealer are required.
This module is a direct replacement for a wide range of GM vehicles using the T42 controller and 4-speed automatic transmissions like the 4L60E, 4L65E, and 4L70E. It is interchangeable with numerous part numbers, including 24252114, 24234503, 24230461, and 24235732, guaranteeing a perfect fit and function.
Frequently Asked Questions
Why is VIN programming necessary for this module?
VIN programming loads your vehicle’s specific software and calibrations onto the TCM. This ensures the module communicates correctly with the engine computer and other systems, controlling shift points, line pressure, and torque converter lockup exactly as the manufacturer intended for your specific model and powertrain.
Where is the 2006-2007 Rainier Transmission Module located?
On the 2006-2007 Buick Rainier and similar GM platforms like the Trailblazer and Envoy, the TCM is typically located in the engine compartment on the driver’s side (LH side), often near the firewall or strut tower.
Can I install this part myself?
Yes, this is a straightforward installation for a confident DIYer. It typically involves disconnecting the battery, unplugging the electrical connectors from the old module, unbolting it, and then installing the new one in reverse order. The entire process often takes less than 30 minutes.
Will this fix a P0700 transmission code?
A P0700 code is a general fault code indicating that the TCM has detected a problem and has requested the check engine light to be turned on. While this module can resolve the root cause of the P0700, it’s essential to scan for other specific transmission codes (like P07xx) to confirm the diagnosis. A failing TCM is a very common cause for this code.
Is there a core charge for my old part?
No, there is no core charge required for this module. You can keep your old part without the hassle of returning it, saving you time and money on shipping.