Restore Peak Transmission Performance in Your Savana Van
Is your 2006-2014 GMC Savana 2500 experiencing frustrating and unreliable transmission behavior? Symptoms like harsh shifting, delayed gear engagement, or getting stuck in limp mode are often tell-tale 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 disrupt your vehicle’s drivability, fuel economy, and overall reliability. This replacement GM T42 TCM, part number YNXS, is the definitive solution to get your workhorse van back on the road and performing flawlessly.
From the Diagnostic Bay
We had a local contractor bring in his 2011 Savana 2500 work van. The complaint was intermittent but severe: one moment it would drive fine, the next it would slam into gear or refuse to shift past 2nd. The check engine light was on with a P0700 code, pointing to a general transmission fault. After checking the fluid and solenoids, our diagnostics pointed directly to an erratic TCM. The van was his livelihood, and dealership delays were not an option. We installed one of our VIN-programmed T42 modules. The installation took less than 30 minutes, and after clearing the codes, the van shifted like it just rolled off the factory floor. He was back on the job the same afternoon, a testament to how a precise, pre-programmed part can solve complex issues efficiently.
Symptoms of a Failing Savana 2500 TCM
- ✔ Erratic Shifting: Experiencing sudden, hard shifts, or a noticeable hesitation between gears.
- ✔ Stuck in Gear: The transmission may lock itself into a single gear (often 2nd or 3rd) as a protective measure, known as “limp mode.”
- ✔ Warning Lights: The Check Engine Light or a specific transmission warning light will illuminate on your dashboard.
- ✔ Diagnostic Trouble Codes (DTCs): A scan tool may reveal codes like P0700 (Transmission Control System Malfunction), P0750, or other solenoid-related faults.
- ✔ Poor Fuel Economy: Inefficient shifting and torque converter lockup caused by a bad TCM can lead to a significant drop in gas mileage.
- ✔ No Communication: In severe cases, a scan tool may be unable to communicate with the TCM, indicating a complete module failure.
The Importance of a Programmed 2006-2014 Savana 2500 TCM
Modern vehicles like your GMC Savana rely on a network of computers that communicate constantly. The TCM must be programmed with your vehicle’s specific Vehicle Identification Number (VIN) to function correctly. An unprogrammed module simply won’t work. Our service eliminates the need for an expensive trip to the dealership for programming. We flash the module with the latest GM software updates specific to your VIN before it ships. This ensures that it is a true plug-and-play component, ready for immediate installation and operation. This process not only guarantees perfect compatibility but also helps resolve common software-related drivability issues, ensuring optimal shift points and transmission longevity.
Simple Installation and Lasting Quality
Replacing the TCM on your Savana 2500 is a straightforward job. The module is conveniently located in the engine compartment on the right-hand side. The process typically involves disconnecting the battery, unplugging the electrical connectors from the old module, unbolting it, and installing the new one in its place. Once the new module is connected and the battery is reconnected, the vehicle is ready to go. We recommend using a basic scan tool to clear any stored DTCs after installation. Built to meet or exceed OEM specifications, this module is backed by a one-year warranty, giving you peace of mind and dependable performance for the long haul. No core charge is required, so you can keep your old part without any hassle.
This module is a direct replacement for a wide range of GM vehicles using the T42 controller and is interchangeable with part numbers such as 24252114, 24234503, 24230461, and YNXS. Don’t let a faulty TCM sideline your vehicle. Restore its smooth, reliable operation with this pre-programmed, high-quality replacement.
Frequently Asked Questions
What does this T42 TCM do in my Savana van?
The Transmission Control Module (TCM) acts as the central computer for your automatic transmission. It processes data from various sensors to control shift solenoids, regulate transmission fluid pressure, and manage the torque converter lock-up, ensuring smooth and efficient gear changes.
Is this TCM ready to install out of the box?
Yes. This module is expertly programmed to your vehicle’s specific VIN before shipping. This makes it a true plug-and-play solution, requiring no additional programming or trips to the dealership for setup.
Where is the TCM located on a 2006-2014 Savana 2500?
On the GMC Savana 2500 and Express vans from this era, the TCM is typically found in the engine compartment on the right-hand (passenger) side. Always confirm the location before beginning the replacement.
Will this part fix a P0700 diagnostic trouble 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. While a faulty TCM is a very common cause for this code, it’s essential to diagnose the specific secondary codes stored in the TCM to confirm the root cause. Replacing a failed TCM will resolve the P0700 code associated with its failure.
Do I need to return my old TCM?
No, there is no core charge for this part. You can keep or dispose of your old module without the need to return it, simplifying the repair process for you.