Get Your Work Van Back on the Road: A Reliable Fix for Transmission Faults
As a mechanic with over two decades of experience, I’ve seen countless work vans like the GMC Savana sidelined by transmission problems. When your van is your livelihood, you can’t afford downtime. A faulty Transmission Control Module (TCM) is often the hidden culprit behind erratic shifting, warning lights, and a vehicle that’s stuck in limp mode. This T42 TCM, part number 24230461, is the definitive solution for your 2006-2014 Savana 1500 TCM issues, arriving pre-programmed to your vehicle’s VIN for a hassle-free, plug-and-play repair.
The TCM is the brain of your automatic transmission, controlling everything from shift points to torque converter lockup. Over time, engine heat and vibration can degrade its sensitive internal circuits, leading to frustrating and unpredictable behavior. Instead of a costly trip to the dealership for diagnostics and programming, this module allows you to perform the repair yourself or save your mechanic significant time, getting you back to work faster.
Case Study: The Contractor’s Intermittent Shifting Nightmare
I remember a local contractor bringing in his ’09 Savana 1500. The van would shift perfectly for days, then suddenly start banging into gear or refuse to shift out of 2nd. He’d already replaced a solenoid based on a code, but the problem persisted. After checking the wiring, we focused on the TCM. Intermittent electrical faults inside the module were causing the unpredictable commands. We installed a VIN-programmed T42 module, and the van was back on the job site the same afternoon, shifting like new. This pre-programmed solution saved him from losing another day of work and the expense of a dealership visit.
Is Your Savana Van Showing These Transmission Problems?
A failing TCM can manifest in several ways. If you’re experiencing any of the following, this module is likely the solution you need. In my shop, these are the classic signs I look for when diagnosing a 2006-2014 Savana 1500 TCM failure.
- ✔ Harsh, slamming, or delayed gear shifts.
- ✔ Vehicle is stuck in “limp mode” (usually 2nd or 3rd gear).
- ✔ Check Engine Light or Transmission warning light is on.
- ✔ Diagnostic Trouble Codes (DTCs) like P0700, P0750, or other solenoid-related faults are present.
- ✔ The transmission refuses to upshift or downshift correctly.
- ✔ A noticeable drop in fuel economy.
- ✔ Complete loss of communication with the transmission module.
A Straightforward Installation Guide for Your Savana
One of the best features of this part is its simple installation. You don’t need specialized equipment, and the job can be done in your driveway in under 30 minutes. For your specific Savana Van, the module is easy to access.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts and help reset the system.
- Locate the TCM: On the 2006-2014 Savana Van, the TCM is located in the engine compartment on the right-hand (passenger) side.
- Disconnect and Remove: Carefully unclip the wiring harness connectors. Then, unbolt the module from its mounting bracket and remove it from the vehicle.
- Install the New Module: Mount the new, pre-programmed TCM in the same location and securely fasten it. Reconnect the wiring harnesses, ensuring they click into place.
- Final Steps: Reconnect the negative battery terminal. While the module is plug-and-play, it’s good practice to use a basic OBD2 scan tool to clear any stored fault codes from the vehicle’s memory.
Verified Vehicle Compatibility
This T42 TCM is a direct replacement for a wide range of General Motors vehicles equipped with 4-speed automatic transmissions like the 4L60E, 4L65E, and 4L80E. It is interchangeable with part numbers 24252114, 24234503, 24230461, and more. While this page is focused on the 2006-2014 Savana 1500 TCM, it also fits the following models:
- Chevrolet: Silverado, Tahoe, Suburban, Express, Impala, Cobalt, HHR, Monte Carlo
- GMC: Sierra, Yukon, Savana, Envoy, Canyon
- Buick: LaCrosse, Lucerne, Rainier, Rendezvous
- Cadillac: DTS
- Pontiac: G6, G5, Grand Prix
- Saturn: Vue, Aura, Ion
- Hummer: H3
- Saab: 9-7X
Frequently Asked Questions
Does this module require programming at the dealership?
No. This Transmission Control Module comes fully programmed to your vehicle’s specific VIN. It is ready for installation right out of the box, saving you time and money.
What tools do I need for installation?
Basic hand tools are all that’s required, typically a socket set to remove the mounting bolts and a tool to disconnect the battery terminal. A scan tool is recommended to clear old codes but is not required for the module to function.
Is there a core charge for my old part?
No, there is no core charge. You can keep your old part or dispose of it without the hassle of returning it.
Will this fix a P0700 trouble code?
A P0700 code is a general fault request from the TCM to the main engine computer (ECM) to turn on the check engine light. While this module often resolves the underlying issue causing the P0700, it’s important to scan for other transmission-specific codes (like P0750-P0758) to confirm the diagnosis.
What is the warranty on this part?
This part comes with a one-year replacement warranty, ensuring it provides lasting and reliable performance for your vehicle.