Restore Peak Transmission Performance in Your Buick Rainier
Is your 2006-2007 Buick Rainier experiencing frustrating transmission issues like harsh shifting, delayed gear engagement, or getting stuck in limp mode? These are classic signs of a failing Transmission Control Module (TCM). The TCM is the electronic brain of your automatic transmission, responsible for orchestrating every gear change, managing torque converter lockup, and monitoring system health. When it fails, it can disrupt your vehicle’s drivability, fuel economy, and overall reliability.
This OEM-quality T42 Transmission Control Module, part number 24235754, is the definitive solution. We pre-program each module to your vehicle’s specific VIN, ensuring it works perfectly right out of the box. This critical step eliminates the need for expensive and time-consuming dealership visits for programming, making it a true plug-and-play fix for both professional technicians and DIY mechanics.
From the Diagnostic Bay
We recently had a 2007 GMC Yukon in the shop with a ghost-in-the-machine problem. The owner complained of intermittent, violent shifts and the transmission light would flash on and then disappear. Standard diagnostic codes pointed towards a solenoid, but replacing it didn’t solve the issue. After checking the wiring harness, we suspected the TCM. Once we installed a VIN-programmed T42 module just like this one, the erratic behavior vanished completely. The internal circuitry of the old module was failing under certain temperature conditions, a common issue these units face over time. This highlights why replacing the entire module is often the only permanent fix.
Key Symptoms of a Failing 2006-2007 Rainier TCM
- ✔ Harsh, erratic, or delayed gear shifts that disrupt smooth driving.
- ✔ The vehicle enters ‘limp mode,’ often getting stuck in 2nd or 3rd gear.
- ✔ An illuminated Check Engine Light or Transmission Warning Light on your dashboard.
- ✔ Diagnostic trouble codes (DTCs) such as P0700, P0750, or other solenoid-related faults.
- ✔ A noticeable decrease in fuel efficiency due to improper gear management.
- ✔ Inability to shift up or down, or complete loss of transmission function.
Why Choose Our VIN-Programmed TCM?
Our commitment is to provide a seamless and effective repair. This T42 module is not just a replacement part; it’s a complete solution designed for longevity and performance. It directly interchanges with numerous part numbers, including 24252114, 24234503, and 24235754, making it a versatile component for a wide range of GM vehicles from 2006-2014 equipped with 4-speed automatic transmissions like the 4L60E, 4L65E, and 4L70E.
Installation is straightforward. The module is typically located in the engine compartment (e.g., next to the battery, on the strut tower, or under the air cleaner box). Simply disconnect the vehicle’s battery, swap the module, and reconnect. Using a basic scan tool to clear any stored DTCs after installation is recommended. Best of all, there is no core charge, so you can complete your repair without the hassle of returning the old part.
Frequently Asked Questions
What does this Transmission Control Module do?
The TCM acts as the central computer for your automatic transmission. It receives data from various vehicle sensors to control shift solenoids, regulate hydraulic pressure, and engage the torque converter clutch, ensuring smooth and efficient operation.
Why is VIN programming so important for this part?
VIN programming loads your vehicle’s specific software and calibration files onto the module. This ensures the TCM communicates correctly with the engine computer and other systems, providing optimal shift points and performance tailored to your exact vehicle configuration. Without it, the transmission may not function correctly, if at all.
Will I need to visit a dealership after installing this module?
No. Because we pre-program the module to your VIN before shipping, it arrives ready for installation. This plug-and-play process saves you the time, cost, and inconvenience of a trip to the dealer for programming.
Is this part difficult for a DIY mechanic to install?
For most models, the installation is relatively simple and can be completed in under 30 minutes with basic hand tools. The module is usually easily accessible in the engine bay. Always disconnect the battery before starting the replacement.
What happens if I ignore the symptoms of a failing TCM?
Ignoring a failing TCM can lead to more severe and expensive problems. Continued erratic shifting can cause excessive wear and tear on internal transmission components like clutches and bands, potentially leading to a complete transmission failure that requires a costly rebuild or replacement.