Restore Peak Transmission Performance in Your GM Vehicle
Is your 2006-2014 GMC Savana 3500 or other GM vehicle suffering from erratic shifting, getting stuck in gear, or throwing transmission-related trouble codes? A faulty Transmission Control Module (TCM) is often the culprit. This essential component is the brain of your automatic transmission, responsible for managing shift points, torque converter clutch engagement, and fluid pressure. When it fails, it can lead to poor performance, decreased fuel economy, and potentially catastrophic transmission damage. This genuine GM T42 TCM, service part number 24235753, is the definitive solution to restore your vehicle’s factory-perfect shifting and reliability.
From the Diagnostic Bay
We had a 2011 Savana 3500 work van come into the shop that the owner described as ‘possessed.’ It would shift perfectly for days, then suddenly start slamming into gear and get stuck in 3rd. The check engine light was on with a P0700 code and a few solenoid circuit codes. After checking the wiring harness and solenoids, we suspected the TCM. We installed one of our VIN-programmed T42 modules. The installation took less than 20 minutes. After a quick battery disconnect to clear the adaptive memory and a test drive, the van was shifting like it just rolled off the assembly line. The owner called a week later to say his van had never driven better and his fuel mileage had even improved. This is the difference a correctly programmed, high-quality module makes.
Signs Your Savana 3500 Transmission Module is Failing
A failing TCM can manifest in various ways, from subtle annoyances to critical failures. Being able to identify these symptoms early can save you from more extensive and costly transmission repairs down the road. This module is the direct fix for these common issues.
- âś” Harsh or Erratic Shifting: Experiencing sudden, jerky shifts, or a noticeable delay when the transmission engages Drive or Reverse.
- âś” Stuck in Limp Mode: The vehicle refuses to shift out of a single gear (often 2nd or 3rd) to protect the transmission from further damage.
- âś” Warning Lights: The Check Engine Light or a dedicated transmission warning light illuminates on your dashboard.
- âś” Diagnostic Trouble Codes (DTCs): Common codes like P0700 (Transmission Control System Malfunction), P0750-P0758 (Shift Solenoid Errors), or other transmission-specific codes are stored.
- âś” Poor Fuel Economy: Inefficient shifting and incorrect torque converter lockup can lead to a significant drop in your vehicle’s MPG.
- âś” No Shifting: The transmission may refuse to upshift or downshift, regardless of engine speed or vehicle load.
- âś” Complete Transmission Failure: In severe cases, a bad TCM can lead to a complete loss of communication and transmission function.
The Critical Advantage: Plug-and-Play VIN Programming
Don’t settle for a generic, unprogrammed module that requires an expensive trip to the dealership for flashing. We take care of the most critical step for you. Before this module ships, we program it with your vehicle’s specific Vehicle Identification Number (VIN) and load 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. This tailored programming guarantees optimal shift strategies, correct torque converter operation, and resolves common software-related DTCs without any additional setup. It’s a true plug-and-play solution designed for both professional technicians and DIY installers.
Installation and Compatibility
Installation is straightforward. On the 2006-2014 Savana 3500, the module is typically located in the engine compartment on the right-hand side. For other models like the Silverado, Tahoe, or Impala, it may be next to the battery, on the LH strut tower, or under the air cleaner box. The process generally takes less than 30 minutes. Simply disconnect the battery, unplug the electrical connectors from the old module, unbolt it, and install the new one in its place. Reconnect everything, and you’re ready to go. We recommend using a scan tool to clear any lingering DTCs after installation for a clean slate.
This T42 TCM is a direct replacement for a wide range of GM vehicles equipped with 4-speed automatic transmissions like the 4L60E, 4L65E, 4L70E, and 4L80E. It is interchangeable with numerous part numbers, including: 24252114, 24234503, 24230461, 24234274, 24235340, 24235754, 24238856, 24239224, 24239926, 24240400, 24241806, 24243901, 24243921, 24255280, 24256960, 24235732, 24240449, and YNXS.
Frequently Asked Questions
Why is VIN programming so important for a TCM?
VIN programming loads your vehicle’s specific software, including shift point data, torque converter strategy, and communication protocols. Without it, a new TCM won’t communicate correctly with the engine and other modules, leading to poor performance, error codes, or the vehicle not starting at all. Our pre-programming saves you a costly and time-consuming trip to the dealership.
Will this module fit vehicles other than the Savana 3500?
Yes, absolutely. This T42 TCM is used across a vast range of 2006-2014 GM vehicles, including the Chevrolet Silverado, Tahoe, Express, Impala; GMC Sierra, Yukon; Cadillac DTS; Buick LaCrosse, and many others with compatible 4-speed automatic transmissions. We program it specifically for the vehicle you provide the VIN for.
Is this installation difficult for a DIY mechanic?
For most individuals with basic mechanical skills, this is a very manageable job. It typically involves disconnecting the battery, unplugging a few electrical connectors, and removing a few bolts. The key is locating the module, which is easily accessible in the engine bay on most models. No special tools are required.
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 and has requested the check engine light be turned on. Often, replacing a faulty TCM will resolve the underlying issue causing the P0700 and any related specific transmission codes (like for solenoids or sensors). After installation, be sure to clear all codes with a scan tool.
Is there a core charge for this part?
No, there is no core charge required for this transmission control module. You can keep your old part without the hassle of returning it, saving you time and money.