Restore Peak Transmission Performance in Your GM Vehicle
Is your 2006-2014 GMC Savana 3500 or other GM vehicle suffering from harsh shifting, getting stuck in gear, or displaying transmission-related error codes? A failing Transmission Control Module (TCM) is often the culprit behind these frustrating and potentially damaging issues. This genuine OEM-quality T42 TCM, service number 24230461, is the definitive solution to restore the precise, smooth operation of your automatic transmission. As the electronic brain of your transmission, the TCM governs every shift point, controls torque converter lockup, and monitors system health. When it fails, drivability is severely compromised.
From the Diagnostic Bay
We had a 2011 Chevy Express van come in with a classic complaint: it would intermittently get stuck in 3rd gear (limp mode) and had a P0700 code stored. The owner had already replaced two different shift solenoids based on sub-codes, but the problem persisted. After a quick data scan, we saw erratic communication from the TCM. Instead of chasing more internal transmission parts, we installed one of our VIN-programmed T42 modules. The van was shifting perfectly within 30 minutes of arrival. It’s a prime example of how diagnosing the root cause—the module itself—saves time, money, and unnecessary repairs.
Symptoms of a Failing GM T42 TCM
A faulty TCM can manifest in various ways, often mimicking internal transmission problems. If you’re experiencing any of the following, your module is the most likely cause:
- ✔ Erratic and Harsh Shifting: Abrupt, jerky, or delayed gear changes that make driving uncomfortable and unpredictable.
- ✔ Stuck in Limp Mode: The vehicle refuses to shift out of a single gear (usually 2nd or 3rd) to protect the transmission from further damage.
- ✔ Warning Lights: The Check Engine Light or a dedicated transmission warning light is illuminated on your dashboard.
- ✔ Diagnostic Trouble Codes (DTCs): Common codes include P0700 (Transmission Control System Malfunction) and various solenoid-specific codes (e.g., P0750, P0753, P0758).
- ✔ No Upshift or Downshift: The transmission fails to shift into higher gears as you accelerate or downshift as you slow down.
- ✔ Poor Fuel Economy: Inefficient shifting and torque converter operation lead to a noticeable decrease in MPG.
- ✔ Complete Communication Loss: In severe cases, the TCM may fail entirely, preventing the vehicle from starting or moving.
The Critical Advantage of Our Programmed Savana 3500 TCM
This isn’t just a replacement part; it’s a complete, ready-to-install solution. The single most important feature is our complimentary VIN programming service. We flash the module with your vehicle’s specific Vehicle Identification Number and the latest GM software updates before it ships. This ensures the TCM communicates flawlessly with your vehicle’s engine computer (ECU) and other systems right out of the box. You avoid the expensive and time-consuming trip to a dealership for programming, making this a true plug-and-play repair for both professional technicians and DIY mechanics.
Built to strict OEM standards, this module guarantees reliability and longevity. It directly replaces a wide range of original part numbers, including 24252114, 24234503, 24230461, and many others, ensuring broad compatibility across the GM lineup of trucks, vans, and SUVs equipped with 4-speed automatic transmissions like the 4L60E, 4L65E, and 4L80E.
Effortless Installation
Replacing the TCM is a straightforward process. On the 2006-2014 Savana 3500, the module is typically located in the engine compartment on the right-hand side. For other models, it can be found near the battery, on the LH strut tower, or under the air cleaner box. Simply disconnect the battery, unplug the electrical connectors from the old module, unbolt it, and install the new one in its place. Reconnect the battery, and you’re ready to go. We recommend using a basic scan tool to clear any old fault codes after installation. Best of all, there is no core charge, so you can keep your old part without any hassle.
Frequently Asked Questions
Why is VIN programming so important for this part?
VIN programming loads your vehicle’s specific software and calibration files onto the TCM. Without it, the module cannot communicate correctly with the engine and other systems, leading to continued shifting problems, error codes, or even a no-start condition. Our pre-programming service makes the part plug-and-play.
Is this a difficult part to install myself?
For most individuals with basic mechanical skills, this is an easy installation that typically takes less than 30 minutes. It involves disconnecting the battery, locating the old module in the engine bay, swapping the electrical connectors, and bolting the new module in place.
Will this module fit vehicles other than the Savana 3500?
Yes, this T42 TCM is compatible with a vast range of 2006-2014 General Motors vehicles, including the Chevrolet Silverado, Tahoe, Express, GMC Sierra, Yukon, Buick LaCrosse, Cadillac DTS, and many more that use a 4-speed automatic transmission. Please check the detailed fitment list.
What happens if I continue driving with a bad TCM?
Continuing to drive with a faulty TCM can lead to severe and expensive damage to your transmission’s internal mechanical parts. Harsh shifting and improper fluid pressure can burn out clutches and damage hard parts, potentially requiring a complete transmission rebuild.
Do I need to return my old part?
No, there is no core charge for this transmission control module. You can keep or dispose of your old part at your convenience without any additional fees or hassle.