If your 2006-2014 GMC Savana 2500 is experiencing harsh shifting, getting stuck in gear, or throwing transmission codes, you’re likely dealing with a failed Transmission Control Module (TCM). As the electronic brain of your automatic transmission (like the 4L60E, 4L65E, or 4L80E), a faulty TCM can bring your work van to a grinding halt. This replacement T42 TCM, part number 24239224, is the definitive, reliable solution to restore your vehicle’s performance and get you back on the road without a costly trip to the dealership.
The biggest hurdle with TCM replacement has always been the need for expensive programming. We eliminate that step entirely. By providing your vehicle’s VIN at checkout, we program the module with the latest GM software specifically for your Savana. This means it arrives ready for a true plug-and-play installation, saving you time, money, and the headache of scheduling a dealer appointment.
A Technician’s Notebook: The Intermittent Limp Mode Case
A contractor brought his ’09 Savana 2500 into my shop, frustrated with a ghost in his transmission. The van would randomly drop into limp mode (stuck in 3rd gear) with a P0700 code, but only after it was fully warmed up on hot days. He’d already replaced a shift solenoid with no luck. After connecting my scan tool and monitoring live data, I saw the TCM was intermittently losing communication and commanding erratic line pressure. This is a classic sign of internal circuit failure within the module due to heat soak. Instead of a costly transmission teardown, we installed a VIN-programmed TCM. The problem vanished immediately. It’s a textbook example of why correctly diagnosing the electronics first saves hundreds, if not thousands, in unnecessary mechanical repairs.
Is Your Savana Van Showing These Warning Signs?
A failing Savana 2500 Transmission Module can manifest in several ways. If you’re noticing any of the following, it’s time to consider a replacement:
- ✔ Harsh, banging shifts or delayed gear engagement.
- ✔ The vehicle is stuck in “limp mode” and will not shift out of 2nd or 3rd gear.
- ✔ An illuminated Check Engine Light with Diagnostic Trouble Codes (DTCs) like P0700, P0750, P0753, P0758, or other solenoid-related faults.
- ✔ Complete loss of upshifting or downshifting capabilities.
- ✔ Poor fuel economy and a feeling of sluggish performance.
- ✔ The transmission seems to overheat more easily than normal.
Simple Installation to Get Your Van Back to Work
This is a repair you can confidently tackle yourself. For the GMC Savana 2500, the TCM is typically easy to access. Follow these steps for a smooth installation in under 30 minutes.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts and help reset the system.
- Locate the Module: On most Savana and Express vans, the TCM is located in the engine compartment on the right-hand (passenger) side.
- Disconnect and Remove: Carefully unplug the electrical connectors. Press the release tabs firmly to avoid breaking them. Then, unbolt the old module from its mounting bracket.
- Install the New Module: Bolt the new, pre-programmed TCM into place and securely reconnect the electrical harnesses. You should hear a click as they lock in.
- Final Steps: Reconnect the battery terminal. While the module is pre-programmed, it’s good practice to use a basic OBD2 scan tool to clear any stored fault codes from the ECU. Start the vehicle and test drive to confirm smooth shifting.
Verified Fitment For These GM Vehicles
This T42 TCM is a direct replacement for part number 24239224 and is interchangeable with many other service numbers. It fits a wide range of 2006-2014 General Motors vehicles, including but not limited to:
- GMC Savana 1500/2500/3500 Van (2006-2014)
- Chevrolet Express 1500/2500/3500 Van (2006-2014)
- Chevrolet Silverado & GMC Sierra (Multiple Years)
- Chevrolet Tahoe & GMC Yukon (Multiple Years)
- Cadillac, Buick, Pontiac, Saturn, Hummer, and Saab models.
Please verify your specific model in the fitment chart or contact us with your VIN to ensure 100% compatibility.
Frequently Asked Questions
Do I need to program this module?
No. This module is delivered to you fully programmed to your vehicle’s VIN. It is ready for installation right out of the box, with no need for a scan tool or dealership visit for programming.
Where is the TCM located on my Savana 2500?
On the 2006-2014 Savana and Express vans, the Transmission Control Module is typically found in the engine bay, mounted on the right-hand (passenger) side.
Will this fix a P0700 trouble code?
A P0700 code is a general fault request from the TCM to the main engine computer. While this module often resolves the root cause (like a faulty solenoid circuit inside the TCM), it’s crucial to check for other transmission-specific codes that are usually present alongside the P0700 to confirm the diagnosis.
Is there a core charge for my old part?
No, there is no core charge. You can keep your old module without the hassle of returning it, saving you time and money.
What kind of warranty is included?
This module is backed by our one-year warranty, giving you peace of mind and assurance in the quality and reliability of your repair.