Get Your Work Van Back on the Road with a Reliable, Programmed TCM
If your 2006-2014 GMC Savana 2500 is suffering from unpredictable shifting, getting stuck in gear, or throwing transmission codes, the culprit is often a failing Transmission Control Module (TCM). As a technician with over two decades of experience, I’ve seen firsthand how a faulty TCM can bring a dependable workhorse to a standstill. This isn’t just an inconvenience; it’s lost time and money. This T42 TCM, part number 24230461, is the definitive solution, arriving pre-programmed to your van’s specific VIN. This means you can skip the expensive trip to the dealership for programming and get right to the fix.
The TCM is the brain of your automatic transmission, managing everything from shift points and line pressure to torque converter lockup. When it fails, communication breaks down, leading to the frustrating symptoms you’re likely experiencing. Our module restores that critical communication, ensuring the 4L80E or other compatible transmission in your van operates with the smoothness and reliability you depend on. This isn’t just a replacement part; it’s a restoration of your vehicle’s core performance and your peace of mind.
Case Study: The Ghost in the Transmission
A local contractor brought in his 2011 Savana 2500, complaining of intermittent, violent shifts and occasionally getting stuck in 3rd gear (limp mode). He’d already replaced two shift solenoids based on codes, but the problem persisted. After hooking up my scanner, I saw communication dropouts with the TCM. Instead of throwing more parts at it, we installed a VIN-programmed Savana 2500 Transmission Module. The problem was solved instantly. The pre-programming meant the van was back in service the same afternoon, saving him from another day of lost work.
Is Your Van Showing These Symptoms?
A failing TCM can manifest in several ways. If you’re noticing any of the following, it’s a strong indicator that your module needs attention:
- ✔ Harsh, banging shifts or delayed gear engagement.
- ✔ Vehicle is stuck in a single gear (often called ‘limp mode’).
- ✔ Check Engine Light is on with transmission-related Diagnostic Trouble Codes (DTCs) like P0700, P0750-P0758, or other solenoid circuit faults.
- ✔ Inability to upshift or downshift properly.
- ✔ A sudden drop in fuel economy or signs of the transmission overheating.
- ✔ Complete loss of communication with the transmission.
A Straightforward Guide to Installation
Replacing the Savana 2500 Transmission Module is a job most DIYers or any professional can handle in under 30 minutes. No specialized programming tools are required.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- Locate the Module: On the Savana and Express vans, the TCM is typically found 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 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 battery terminal. While our programming handles the heavy lifting, it’s good practice to use a basic scan tool to clear any stored fault codes from the vehicle’s memory. Start the vehicle and test drive to confirm smooth shifting.
Verified Vehicle Compatibility
This module is a direct-fit replacement for a wide range of General Motors vehicles equipped with the T42 TCM. While this page is focused on the Savana 2500 Transmission Module, it is also confirmed to fit the following models. Please verify your part number (24230461) or one of the interchanges (24252114, 24234503, etc.) for a perfect match.
- GMC Savana 1500/2500/3500 Van (2006-2014)
- Chevrolet Express 1500/2500/3500 Van (2006-2014)
- Chevrolet Silverado & GMC Sierra Pickups (Check specific years/engines)
- Chevrolet Tahoe/Suburban & GMC Yukon/Yukon XL (Check specific years)
- Cadillac, Buick, Pontiac, Saturn, Hummer, and Saab models from 2006-2011.
Does this module really not need to be programmed by a dealer?
Does this module really not need to be programmed by a dealer?
Correct. We program the module to your vehicle’s VIN before shipping it. This makes it a true plug-and-play solution, saving you the time and expense of a dealership visit.
Is this a new or used part?
This is an OEM-quality replacement part, built to meet or exceed original factory specifications and backed by our one-year warranty for your confidence.
Where is the TCM located on my 2009 Savana 2500?
On the 2006-2014 Savana and Express vans, the Transmission Control Module is located in the engine compartment, mounted on the right-hand (passenger) side.
Do I need to send my old part back? Is there a core charge?
No, there is absolutely no core charge for this part. You can keep your old module, recycle it, or dispose of it at your convenience without any hassle.
Will this fix a P0700 trouble code?
A P0700 code is a general fault request from the TCM to the main computer. While a faulty TCM is a very common cause, you should always diagnose the specific codes stored within the TCM itself (like solenoid or sensor codes) to be certain. In many cases, replacing a failed TCM will resolve the P0700 code and its underlying causes.