Restore Peak Performance to Your GM Vehicle’s Transmission
If you’re experiencing frustrating and unpredictable shifting, warning lights on your dashboard, or your vehicle being stuck in ‘limp mode,’ a faulty Transmission Control Module (TCM) is the most likely cause. This vital component is the brain of your automatic transmission, and when it fails, it can cause a host of performance issues. This replacement GM T42 TCM, service number 24230461, is the definitive solution for your 2006-2007 Buick Rainier and a wide range of other GM vehicles, engineered to restore the smooth, reliable operation you depend on.
From the Diagnostic Bay
We had a 2008 Silverado 1500 come into the shop that the owner was ready to give up on. It was slamming into gear and occasionally refusing to shift past 3rd. The dash was lit up with a Check Engine light, and our scanner pulled a P0700 and several solenoid circuit codes. Initially, the owner suspected a major internal transmission failure. However, after checking the wiring and solenoid resistances, we identified the culprit: the original T42 TCM was failing intermittently. Instead of a multi-thousand dollar transmission job, we installed a VIN-programmed module just like this one. In under an hour, all codes were cleared, and the truck was shifting perfectly. It’s a common story, and this part is often the simple fix.
Is Your Vehicle Showing These Telltale Symptoms?
A failing TCM doesn’t just degrade your driving experience; it can put stress on your entire transmission. If you notice any of the following signs, it’s time to diagnose your TCM:
- ✔ Harsh, erratic, or delayed gear shifts.
- ✔ The vehicle is stuck in a single gear (limp mode).
- ✔ Check Engine Light or Transmission Warning Light is illuminated.
- ✔ Diagnostic Trouble Codes (DTCs) such as P0700, P0750, or other solenoid-related codes are present.
- ✔ Complete failure to upshift or downshift.
- ✔ A noticeable decrease in fuel economy.
- ✔ The transmission seems to be overheating more than usual.
The Superior Solution: A Pre-Programmed Rainier Transmission Module
What sets this module apart is our expert VIN programming service. We flash the unit with your vehicle’s specific Vehicle Identification Number and the latest GM software updates before it ships. This means the module arrives at your door ready for a true plug-and-play installation. You can bypass the expensive programming fees and scheduling hassles at a dealership. This Rainier Transmission Module is built to meet or exceed original equipment standards, ensuring long-lasting reliability and performance. It directly controls shift solenoids, torque converter lockup, and line pressure, restoring the precise logic your transmission needs to operate efficiently.
Effortless Installation Process
Designed for the confident DIYer or professional technician, installation is straightforward. The TCM is typically located in the engine compartment—often near the battery, on a strut tower, or under the air cleaner box, depending on your specific model. Simply disconnect the vehicle’s battery, unplug the electrical connectors from the old module, unbolt it, and install the new one in its place. Once reconnected, use a standard OBD2 scan tool to clear any stored fault codes. With no core charge, you don’t have to worry about the hassle of returning your old part.
This module is a direct replacement for a wide array of part numbers, including 24252114, 24234503, 24234274, 24239224, 24256960, and many more, making it a versatile solution for countless GM cars, trucks, and SUVs from 2006 to 2014. Whether you’re fixing a Chevrolet Tahoe, GMC Sierra, Cadillac DTS, or Pontiac G6, this part delivers consistent results.
Frequently Asked Questions
Do I need to have this TCM programmed by a dealer?
No. This module comes pre-programmed to your vehicle’s specific VIN. It is ready for installation right out of the box, saving you time and money on dealership programming fees.
Will this fix a P0700 transmission fault code?
In many cases, yes. The P0700 code is a general fault code indicating that the TCM has detected a problem and requested the check engine light. If the TCM itself is the source of the fault, replacing it with this programmed unit will resolve the code and the underlying issue.
Where is the TCM located on my vehicle?
The location varies by model. Common locations include the LH or RH side of the engine compartment, next to the battery, on the LH strut tower, or under the air cleaner housing. Please consult a service manual for your specific vehicle for the exact location.
Is this a genuine OEM part?
This is an OEM-quality part built to the same stringent standards and specifications as the original factory module. It is designed to provide equivalent performance and durability.
Is there a core charge for this part?
No, there is no core charge. You are not required to return your old, faulty module, making the process simpler and more convenient for you.