Restore Peak Performance to Your Van’s Transmission
Is your 2006-2014 GMC Savana 1500 experiencing erratic shifting, getting stuck in gear, or displaying a transmission-related 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 managing shift points, torque converter clutch engagement, and fluid pressure. When it fails, it can lead to poor performance, decreased fuel economy, and potential damage to your transmission. This genuine GM T42 TCM, part number 24235754, is the definitive solution to restore your vehicle’s drivability and reliability.
From the Diagnostic Bay
We had a 2011 Savana 1500 work van come into the shop that the owner described as ‘possessed.’ It would shift hard from 1st to 2nd when cold, and then refuse to shift past 3rd gear on the highway. The check engine light was on, and our scan tool pulled a P0700 (Transmission Control System Malfunction) and a P0752 (Shift Solenoid ‘A’ Stuck On). After verifying the wiring and solenoids were good, we knew the culprit was the internal logic of the TCM. We installed one of our VIN-programmed T42 modules. After a quick battery disconnect and clearing the codes, the van shifted like it just rolled off the factory floor. The customer was back on the road making deliveries the same afternoon, problem solved.
Symptoms of a Failing T42 TCM
- ✔ Harsh, erratic, or delayed gear shifts that disrupt smooth driving.
- ✔ The vehicle enters ‘limp mode,’ often getting stuck in 2nd or 3rd gear.
- ✔ Check Engine Light or Transmission Warning Light is illuminated on the dashboard.
- ✔ Diagnostic Trouble Codes (DTCs) such as P0700, P0750, P0751, P0753, or other solenoid-specific codes are stored.
- ✔ Inability to upshift or downshift properly, leading to high RPMs or bogging.
- ✔ A noticeable decrease in fuel efficiency due to improper gear management.
- ✔ Intermittent loss of communication with the TCM, causing unpredictable behavior.
Why Choose Our Programmed 2006-2014 Savana 1500 Transmission Module?
This isn’t just a replacement part; it’s a complete, ready-to-install solution. The biggest hurdle in replacing a modern TCM is the need for expensive dealership programming. We eliminate that step entirely. By providing your vehicle’s VIN at checkout, we program the module with the latest GM software specific to your Savana 1500. This ensures that all shift strategies and operational parameters are perfectly matched to your vehicle’s configuration. The result is a seamless plug-and-play installation that restores factory performance without any additional costs or hassle. Built to strict OEM standards, this module guarantees durability and precise control over your 4L60E, 4L65E, or 4L70E transmission.
Simple, Hassle-Free Installation
Designed for a straightforward installation, this module can be replaced with basic hand tools. On most Savana vans, the TCM is located in the engine compartment on the right-hand side. Simply disconnect the negative battery terminal, 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. Using a basic scan tool to clear any stored fault codes after installation is recommended. Best of all, there is no core charge, so you don’t have to worry about the cost or inconvenience of sending your old part back.
Frequently Asked Questions
What does ‘VIN Programmed’ mean for my Savana?
VIN programming means we load the module with the specific software calibration file from GM that matches your van’s unique Vehicle Identification Number. This ensures the TCM works perfectly with your engine, axle ratio, and tire size, providing optimal shift points and performance right out of the box.
Will this module fit other GM vehicles besides the Savana?
Yes, this T42 TCM is compatible with a wide range of 2006-2014 GM vehicles equipped with 4-speed automatic transmissions, including the Chevrolet Silverado, Tahoe, Express, GMC Sierra, and Yukon, among many others. Please verify the part number or use our vehicle fitment tool to confirm compatibility.
Do I need any special tools for installation?
No special tools are required. Basic hand tools like a socket set and ratchet are typically all that’s needed. The most important step is to disconnect the vehicle’s battery before you begin to ensure the electrical system is reset.
What is the warranty on this transmission module?
This transmission control module comes with a one-year warranty, giving you peace of mind and protection against any manufacturing defects.
Will this fix a P0700 trouble code?
A P0700 code is a general fault code indicating the TCM has detected a problem. While a faulty TCM is a very common cause, this code can also be triggered by other issues. However, if you are also experiencing shifting problems or have other transmission-specific codes, replacing the TCM is the most likely solution.