Is Your 2006-2014 Savana 2500 Shifting Erratically?
If your GMC Savana 2500 is experiencing harsh shifting, delayed gear engagement, or has a check engine light with transmission codes, a failing Transmission Control Module (TCM) is the most likely culprit. The TCM is the electronic brain of your automatic transmission, responsible for orchestrating every shift, managing torque converter lockup, and monitoring system health. When it fails, it can leave your reliable workhorse feeling unpredictable and unsafe, potentially even stuck in “limp mode.” This replacement GM T42 TCM, part number 24239926, is the definitive solution to restore your vehicle’s factory performance and dependability.
The Plug-and-Play Solution: Pre-Programmed for Your VIN
Forget expensive dealership visits and the hassle of programming tools. We take the guesswork out of the repair by programming this module directly to your vehicle’s unique Vehicle Identification Number (VIN) before it ships. This crucial step ensures that the module communicates flawlessly with your van’s Engine Control Module (ECM) and other onboard systems right out of the box. It arrives loaded with the latest GM software updates, guaranteeing optimal shift points, fuel efficiency, and electronic compatibility. This is a true plug-and-play repair that you can perform with basic hand tools.
From the Diagnostic Bay
We had a 2011 Savana 2500 work van come into the shop with a classic complaint: harsh 1-2 upshifts and a P0751 code for Shift Solenoid ‘A’ Stuck Off. The owner had already spent a few hundred dollars replacing the solenoid himself, but the problem persisted. After a quick diagnostic check, we confirmed the solenoid circuit was electrically sound. The real issue was a failing driver circuit inside the original TCM. We installed one of our VIN-programmed T42 modules, cleared the codes, and the van was shifting like new in under 30 minutes. It’s a common scenario where chasing codes leads to replacing good parts, when the root cause lies within the module itself.
Why Choose Our Savana 2500 Transmission Module?
This isn’t just a replacement part; it’s a comprehensive fix for a wide range of transmission issues. Built to strict OEM specifications, this T42 module directly addresses the common failure points of the original unit. By installing our pre-programmed Savana 2500 Transmission Module, you are ensuring the long-term health and performance of your vehicle’s 4L60E, 4L65E, 4L70E, or 4L80E automatic transmission. It’s the same quality you’d get from a dealership, but without the prohibitive cost and scheduling delays.
Symptoms of a Failing GM T42 TCM
- ✔ Erratic Shifting: Experiencing sudden, hard shifts, or a noticeable delay when the transmission changes gears.
- ✔ Stuck in Gear: The vehicle may get stuck in one gear (often 2nd or 3rd), a condition known as limp mode, to prevent further damage.
- ✔ Warning Lights: The Check Engine Light or a dedicated transmission warning light will illuminate on your dashboard.
- ✔ Diagnostic Trouble Codes (DTCs): Common codes include P0700 (Transmission Control System Malfunction) and various solenoid-specific codes (e.g., P0751, P0756).
- ✔ Poor Fuel Economy: Inefficient shifting and torque converter operation can lead to a significant drop in miles per gallon.
- ✔ No Communication: In severe cases, a scan tool may be unable to communicate with the TCM, indicating a complete module failure.
Simple Installation and Wide Compatibility
Installation is straightforward. On most Savana and Express vans, the TCM is located in the engine compartment on the right-hand side. 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. Because this Savana 2500 Transmission Module is part of the widely used T42 platform, it is also a direct replacement for a vast number of other GM vehicles from 2006-2014, including the Chevrolet Silverado, Tahoe, Impala, GMC Sierra, Yukon, and many more. This unit is interchangeable with numerous part numbers such as 24252114, 24234503, 24239224, and 24256960.
Frequently Asked Questions
What does “VIN Programmed” actually mean?
It means we flash the module with your vehicle’s specific factory software using your 17-digit VIN. This ensures the TCM works perfectly with your engine, options, and tire size, eliminating the need for any additional programming by a dealer. It’s a plug-and-play installation.
Is this part difficult to install myself?
No, for most DIY mechanics, this is a simple repair. The TCM is typically located in an accessible spot in the engine bay. The process involves disconnecting the battery, removing a few bolts, and swapping electrical connectors. It usually takes less than 30 minutes with basic tools.
Will this fix a P0700 transmission code?
A P0700 code is a general fault code indicating the TCM has detected a problem and has requested the Check Engine Light to be turned on. While this module can resolve the underlying issue causing the P0700, you should use a scanner to retrieve the more specific transmission codes (like P07xx) to confirm the diagnosis.
Do I need to return my old module?
No, there is no core charge for this part. You can keep your old module, recycle it, or dispose of it as you see fit, saving you the time and expense of shipping a core back.
How can I be sure this fits my vehicle?
This module fits 2006-2014 GMC Savana 2500 vans and a wide range of other GM vehicles. You can confirm fitment by matching your original part number to the list of interchangeable numbers on this page or by using our vehicle lookup tool. Providing your VIN at checkout guarantees we send you a perfectly programmed part.