Restore Peak Transmission Performance to Your GM Vehicle
Is your Cadillac DTS, Chevrolet Silverado, or GMC Yukon suffering from erratic shifting, delayed gear engagement, or a persistent 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 every shift with precision. When it fails, it can lead to poor performance, decreased fuel economy, and even leave you stranded in limp mode. This genuine OEM-quality T42 Transmission Control Module, service part 24239224, is the definitive solution to restore your vehicle’s drivability and peace of mind.
From the Diagnostic Bay
We had a 2008 Chevy Tahoe come into the shop with the customer complaining of harsh, unpredictable shifts and the transmission light flashing. The scanner pulled a P0700 (Transmission Control System Malfunction) and a few solenoid circuit codes. Initially, we suspected a bad solenoid pack inside the transmission, but after checking the wiring harness and finding no issues, we focused on the TCM. We noticed that the shifting problems were worse once the engine bay got hot. By swapping in one of our pre-programmed T42 modules, all the codes cleared, and the Tahoe shifted as smoothly as it did the day it left the factory. This simple external component saved the customer from a costly and unnecessary transmission rebuild.
Symptoms of a Failing T42 Transmission Control Module
A faulty TCM can manifest in various ways, often mimicking internal transmission problems. Before considering a costly transmission replacement, check if your vehicle is exhibiting any of these common symptoms:
- ✔ Harsh, slamming, or erratic gear shifts.
- ✔ The vehicle gets stuck in one gear (often 2nd or 3rd), known as “limp mode.”
- ✔ Delayed engagement when shifting from Park to Drive or Reverse.
- ✔ Illumination of the Check Engine Light or Transmission Warning Light.
- ✔ Diagnostic Trouble Codes (DTCs) such as P0700, P0750, P0753, P0758, or other solenoid-related codes.
- ✔ Complete failure to upshift or downshift.
- ✔ Noticeable decrease in fuel efficiency.
- ✔ Intermittent loss of communication with the TCM, visible on a scan tool.
Why Our Programmed Cadillac DTS TCM is the Superior Solution
This isn’t just a replacement part; it’s a complete, ready-to-install solution. The most critical feature is our complimentary VIN programming service. When you order, we flash the module with your vehicle’s specific Vehicle Identification Number and the latest GM software updates. This ensures that the TCM communicates flawlessly with your vehicle’s Engine Control Module (ECM) and other systems right out of the box. You avoid the expensive and time-consuming trip to the dealership for programming, making this a true plug-and-play repair. Built to strict OEM specifications, this module guarantees the reliability and longevity your vehicle deserves.
This module is a direct replacement for a wide range of popular GM vehicles equipped with 4-speed automatic transmissions like the 4L60E, 4L65E, and 4L70E. It is compatible with numerous service numbers, including 24252114, 24234503, 24230461, and many more, ensuring a perfect fit for models like the Cadillac DTS, Chevy Impala, GMC Sierra, Hummer H3, and Buick Lucerne.
Frequently Asked Questions
What does “VIN Programmed” mean for my installation?
VIN programming means we load your vehicle’s specific software onto the module before shipping it to you. This makes the installation plug-and-play, as the module is ready to communicate with your car’s other computers immediately. It eliminates the need for expensive programming tools or a trip to the dealership.
Will this part fix my P0700 check engine light code?
A P0700 code is a general fault code indicating the TCM has detected a problem. This module is a very common fix for P0700 and related solenoid codes (like P0753, P0758, etc.), especially if you are also experiencing physical shifting issues. After installation, you should clear all codes with a scan tool.
Where is the TCM located on my vehicle?
The location varies by model. Common locations include the engine compartment on the driver’s or passenger’s side, next to the battery, under the air cleaner box, or on the LH frame rail. For a 2006-2011 Cadillac DTS, it’s typically found in the RH front of the engine compartment. The installation is straightforward and usually takes less than 30 minutes.
Do I need to return my old TCM? (Core Charge)
No, there is no core charge for this part. You can keep your old module without any extra fees or hassle, simplifying the repair process for you.
How can I be certain this is the correct part for my car?
You can verify the fitment by matching the part number 24239224 (or any of the interchangeable numbers listed) to your old unit. You can also use the comprehensive fitment list on this page or contact our expert support team with your VIN, and we will confirm the correct part for you.