Restore Peak Performance to Your GM Vehicle’s Transmission
Is your 2006-2007 Buick Rainier, or another GM vehicle, suffering from erratic shifting, getting stuck in gear, or displaying a check engine light? These are classic signs of a failing Transmission Control Module (TCM). The TCM is the electronic brain of your automatic transmission, responsible for orchestrating gear changes, managing torque converter clutch lockup, and monitoring system health. When it fails, it can lead to poor performance, decreased fuel economy, and potentially catastrophic transmission damage. This OEM-quality T42 TCM, part number 24239224, is the definitive solution to restore your vehicle’s smooth, reliable operation.
From the Diagnostic Bay
We had a 2007 Chevy Silverado 1500 come into the shop with the classic complaint: “It slams into gear and sometimes won’t shift past second.” The customer was worried he needed a full transmission rebuild. We hooked up the scanner and immediately pulled a P0700 (Transmission Control System Malfunction) and several solenoid performance codes. Instead of jumping to the worst conclusion, we checked the TCM connections and power. Everything looked good. Knowing these T42 modules are a common point of failure, we swapped in one of our VIN-programmed units. After a 20-minute installation and clearing the codes, the truck shifted perfectly. The customer saved thousands on an unnecessary transmission rebuild, all by correctly diagnosing and replacing the faulty TCM.
Common Symptoms of a Failing T42 TCM
- ✔ Harsh, erratic, or delayed gear shifts that disrupt your driving experience.
- ✔ The vehicle enters “limp mode,” often getting stuck in 2nd or 3rd gear as a protective measure.
- ✔ Illumination of the Check Engine Light or Transmission Warning Light on your dashboard.
- ✔ Diagnostic Trouble Codes (DTCs) such as P0700, P0750, or other solenoid-related faults are stored in the system.
- ✔ Inability to upshift or downshift, leading to poor acceleration and high RPMs.
- ✔ A noticeable decrease in fuel efficiency as the transmission operates inefficiently.
- ✔ Intermittent loss of communication with the module, causing unpredictable behavior.
The Solution: A Pre-Programmed Rainier Transmission Module
Don’t let a faulty module sideline your vehicle. Our Rainier Transmission Module arrives at your door pre-programmed to your vehicle’s specific Vehicle Identification Number (VIN). This critical step ensures complete compatibility and eliminates the need for expensive trips to the dealership for programming. We install the latest GM software updates, so you receive a component that is ready for immediate, plug-and-play installation. This direct-fit replacement is designed to meet or exceed original equipment specifications, providing a dependable, long-term fix for your transmission woes.
This module is a direct replacement for a wide range of service numbers, including 24252114, 24234503, 24230461, 24239224, and many more, making it a versatile solution for numerous GM cars, trucks, and SUVs from 2006-2014. Whether you’re working on a GMC Sierra, a Chevrolet Impala, or a Cadillac DTS, this T42 TCM restores the precise electronic control your transmission needs.
Key Features & Benefits
- ✔ VIN Programmed for You: Simply provide your VIN during checkout, and we handle the programming. The module arrives ready to install, saving you time and money.
- ✔ Restores Smooth Shifting: By precisely controlling shift solenoids and hydraulic pressure, this module eliminates harsh engagement and gear hunting.
- ✔ OEM-Standard Quality: Built to rigorous standards for durability and performance, ensuring it can handle the demands of daily driving and heavy use.
- ✔ No Core Charge: Keep your old part without the hassle or expense of returning a core. The price you see is the price you pay.
- ✔ Broad Compatibility: An ideal component for repairs or replacements on dozens of GM models equipped with 4-speed automatic transmissions like the 4L60E, 4L65E, and 4L70E.
Simple Installation Process
Replacing the TCM is a straightforward job that can typically be completed in under an hour with basic hand tools. The module is located in the engine bay, with common locations being next to the battery, on the LH strut tower, or under the air cleaner box, depending on your specific model. Always disconnect the vehicle’s battery before beginning the installation to prevent electrical damage and help reset the system. After installing the new module and reconnecting the battery, use a standard OBD2 scan tool to clear any lingering DTCs from the system’s memory. Your vehicle will then be ready for a test drive to confirm the fix.
Frequently Asked Questions
Will this Transmission Control Module require programming?
No. This module is sold as a fully programmed unit. We flash it with your vehicle’s specific VIN and the latest GM software before shipping, making it a true plug-and-play solution. No further dealership visits are necessary.
How can I be sure my TCM is the problem?
Common symptoms include harsh shifting, getting stuck in one gear (limp mode), and transmission-related check engine light codes like P0700. While these are strong indicators, it’s always best to have a professional mechanic or use a quality scan tool to confirm the diagnosis before ordering.
Where is the TCM located on my 2007 Buick Rainier?
On the 2006-2007 Buick Rainier, as well as similar platforms like the Trailblazer and Envoy, the Transmission Control Module is typically located in the engine compartment on the driver’s side (LH) of the vehicle.
Is this part compatible with my Chevy Silverado?
Yes, this T42 TCM is compatible with a vast range of GM vehicles from 2006-2014, including many Chevrolet Silverado, Tahoe, Suburban, GMC Sierra, and Yukon models. Please check the detailed fitment list on this page to confirm compatibility with your specific year and engine configuration.
What is the warranty on this part?
This part comes with our standard one-year warranty, covering any defects in materials or workmanship to give you peace of mind with your purchase.