Restore Peak Performance to Your Van’s Transmission
Is your 2006-2014 GMC Savana 1500 suffering from erratic shifting, getting stuck in gear, or displaying a 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 orchestrating smooth gear changes, managing torque converter lockup, and ensuring overall drivetrain efficiency. When it fails, it can cause a host of frustrating and potentially damaging issues. This genuine OEM-quality T42 TCM, part number 24243901, is the definitive solution to restore your vehicle’s factory performance and reliability.
From the Diagnostic Bay
We had a 2011 Savana work van come into the shop with a classic complaint: it was stuck in 3rd gear (limp mode) and the driver reported incredibly harsh shifts before it failed completely. The initial codes pointed towards a faulty shift solenoid. After replacing the solenoid with no change, we dug deeper. A quick check of the TCM communication data showed intermittent signal loss. Instead of continuing to replace internal transmission parts, we installed a VIN-programmed T42 TCM. The van immediately started shifting perfectly, all codes cleared, and the client was back on the road making deliveries the same afternoon. It’s a textbook case of how a faulty module can mimic internal transmission failure, making a correct diagnosis crucial.
Is Your Savana 1500 Showing Signs of a Faulty TCM?
A failing TCM can manifest in various ways, often being misdiagnosed as a more severe mechanical problem. If you’re experiencing any of the following symptoms, your TCM is the likely culprit:
- ✔ Harsh or Delayed Shifting: The vehicle slams into gear, hesitates between shifts, or feels like it’s slipping.
- ✔ Stuck in Limp Mode: The transmission will not shift out of a single gear (usually 2nd or 3rd) to prevent 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 like P0700 (Transmission Control System Malfunction) or various solenoid-specific codes (P0750, P0753, etc.) are present.
- ✔ Poor Fuel Economy: Inefficient shifting and torque converter operation lead to a noticeable drop in MPG.
- ✔ No Communication: A scan tool is unable to communicate with the transmission module, indicating a complete electrical failure.
The Benefits of Our Programmed Savana 1500 TCM
This isn’t just a replacement part; it’s a complete, ready-to-install solution. We take the guesswork and extra expense out of the repair process. Our key advantage is the pre-programming service, which ensures this module is a perfect match for your vehicle right out of the box. This T42 Savana 1500 TCM is engineered to meet and exceed original equipment standards, providing a dependable and long-lasting repair for your workhorse van.
Effortless Plug-and-Play Installation
For the GMC Savana 1500 models from 2006-2014, the TCM is typically located in the engine compartment on the right-hand side, making it easily accessible. The installation process is straightforward and can often be completed in under 30 minutes with basic hand tools.
- Safety First: Disconnect the negative terminal from your vehicle’s battery.
- Locate the Old Module: Find the TCM in the RH engine compartment.
- Disconnect and Remove: Carefully unplug the electrical connectors and unbolt the old module from its mounting bracket.
- Install the New Module: Bolt the new, pre-programmed TCM into place and securely reconnect the wiring harnesses.
- Final Steps: Reconnect the battery. While our programming handles the critical software, it’s good practice to use a scan tool to clear any stored DTCs from the vehicle’s memory.
Guaranteed Compatibility
This module is a direct replacement for a wide range of GM vehicles equipped with 4-speed automatic transmissions like the 4L60E, 4L65E, and 4L70E. It is interchangeable with numerous part numbers, including 24252114, 24234503, 24230461, 24243901, and more, ensuring you get the correct part for your specific application. Each unit is backed by a one-year warranty for your peace of mind.
Frequently Asked Questions
What exactly does this T42 TCM do for my Savana?
The T42 Transmission Control Module acts as the computer for your automatic transmission. It receives data from various sensors (like vehicle speed and engine RPM) to control shift points, line pressure, and torque converter clutch engagement, ensuring smooth and efficient operation.
Is this part truly plug-and-play?
Yes. We program the module to your vehicle’s specific Vehicle Identification Number (VIN) before shipping. This loads the correct software and calibrations, allowing you to install it without needing any additional programming from a dealership or specialized shop.
Do I need to send my old TCM back (core charge)?
No, there is absolutely no core charge required. You can keep your old part, which simplifies the process and saves you the hassle and expense of return shipping.
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 will often resolve the root cause that triggered the P0700, it’s important to scan for other specific codes (like P07xx) to confirm the diagnosis.
Where is the TCM located on my 2006-2014 Savana 1500?
For the Savana and Express vans in this year range, the Transmission Control Module is consistently found in the engine bay, mounted on the right-hand (passenger) side.