Is your GMC Savana 2500 work van letting you down with unpredictable shifting, getting stuck in gear, or a persistent check engine light? A faulty Transmission Control Module (TCM) is one of the most common culprits behind these frustrating and costly issues. For over 20 years in the shop, I’ve seen how a failing TCM can sideline a perfectly good workhorse. This T42 TCM, part number 24239224, is the definitive solution, arriving pre-programmed to your van’s specific VIN for a true plug-and-play fix.
This module is the electronic brain for your automatic transmission, managing everything from shift solenoid activation to torque converter clutch engagement. When it fails, you get the classic symptoms: harsh bangs into gear, delayed shifts, or being stuck in limp mode. Our VIN programming service means you can skip the expensive trip to the dealership for calibration. We flash the module with the latest GM software for your exact vehicle, ensuring it communicates flawlessly with the Engine Control Module (ECM) right out of the box. This restores the smooth, reliable performance your 2006-2014 Savana 2500 TCM was designed to deliver.
A Technician’s Notebook
I remember a fleet manager bringing in a 2011 Savana 2500 with a complaint that stumped his regular mechanic. The van would randomly refuse to shift out of 2nd gear, but only after it was fully warmed up and had been running for over an hour. There were no consistent solenoid codes, just a general P0700 (Transmission Control System Malfunction). After checking the wiring and fluid, we suspected the TCM was failing internally due to heat soak. We swapped in one of our VIN-programmed T42 modules, and the problem vanished instantly. The driver reported back a week later that the van shifted better than it had in years. That’s the difference a reliable, correctly programmed module makes.
Common Signs of a Failing T42 TCM in Your Van
- ✔️ Harsh, erratic, or delayed gear shifts that make driving uncomfortable and unsafe.
- ✔️ The vehicle enters ‘limp mode,’ often getting stuck in 2nd or 3rd gear to protect the transmission.
- ✔️ Check Engine Light or Transmission Warning Light is illuminated on the dash.
- ✔️ Diagnostic Trouble Codes (DTCs) are present, such as P0700, P0750-P0758 (solenoid circuit faults), or U-codes indicating communication loss.
- ✔️ A noticeable decrease in fuel economy as the transmission operates inefficiently.
- ✔️ Complete failure to shift, or the transmission feels like it’s slipping between gears.
Get Your Van Back on the Road: A 30-Minute Installation Guide
Installing your replacement 2006-2014 Savana 2500 TCM is a straightforward job for any DIYer or professional. No specialized tools are needed.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electronic component replacement.
- Locate the Module: On most Savana and Express vans, the TCM is located in the engine compartment on the right-hand (passenger) side, often mounted near the battery or on the firewall.
- Disconnect and Remove: Carefully unclip the electrical connectors. Be gentle with the locking tabs, as they can become brittle over time. Then, unbolt the module from its mounting bracket.
- Install the New Module: Bolt the new, pre-programmed module into place and securely reconnect the electrical harnesses. You should hear a click as they lock in.
- Final Steps: Reconnect the negative battery terminal. While the module is plug-and-play, it’s good practice to use a basic scan tool to clear any stored fault codes from the vehicle’s memory. Start the engine and test drive to confirm smooth shifting.
Verified Fitment Across the GM Lineup
While this is the ideal solution for your Savana van, this versatile T42 module is also a direct replacement for a wide range of GM cars, trucks, and SUVs equipped with 4-speed automatic transmissions like the 4L60E, 4L65E, and 4L80E. It is interchangeable with part numbers 24252114, 24234503, 24230461, and more. Please see the detailed list below to confirm compatibility.
This part will fit these makes and models with these options
SAVANA 2500 VAN 06-14 Transmission; (RH engine compartment)
EXPRESS 2500 VAN 06-14 Transmission; (RH engine compartment)
SAVANA 3500 VAN 06-14 Transmission; (RH engine compartment)
EXPRESS 3500 VAN 06-14 Transmission; (RH engine compartment)
… and many more models.
Frequently Asked Questions
Do I need to do any programming after I receive this module?
No. We handle all the programming for you. This module is flashed with your vehicle’s VIN and the latest GM software before shipping, making it ready for immediate installation.
What is the warranty on this 2006-2014 Savana 2500 TCM?
This part is backed by our comprehensive one-year warranty, giving you peace of mind and protection against defects.
Is there a core charge? Do I need to send my old part back?
No, there is absolutely no core charge. You can keep your old part, saving you the time and hassle of return shipping.
Will this fix a P0700 code?
A P0700 code is a general fault code indicating the TCM has detected a problem. While this module often resolves the root cause (like an internal TCM failure that triggers the P0700), you should ensure other potential issues like wiring or solenoids have been checked. In many cases, a faulty TCM is the direct cause.
How do I provide my VIN for programming?
You will be prompted to enter your vehicle’s 17-digit VIN during the checkout process. Please double-check it for accuracy to ensure proper programming.