End Transmission Headaches in Your Work Van
If your 2006-2014 GMC Savana 3500 is experiencing delayed shifts, getting stuck in gear, or throwing transmission codes, your workday grinds to a halt. A faulty Transmission Control Module (TCM) is often the culprit, creating frustrating and unreliable performance. I’ve seen it in my shop countless times: a perfectly good transmission sidelined by a failing electronic module. This T42 TCM, part number 24230461, is the definitive solution, arriving pre-programmed to your van’s specific VIN for a true plug-and-play fix that gets you back on the road and back to work without a costly trip to the dealership.
Is Your Savana Van Showing These Telltale Signs?
A failing TCM will give you clear warnings. If you’re noticing any of the following, it’s time to diagnose the module. A faulty 2006-2014 Savana 3500 TCM can cripple your vehicle’s ability to function correctly.
- ✔ Harsh, banging shifts or erratic gear hunting.
- ✔ The vehicle is stuck in “limp mode,” usually in 2nd or 3rd gear.
- ✔ Check Engine Light is on with Diagnostic Trouble Codes (DTCs) like P0700, P0750, or other solenoid-related faults.
- ✔ Failure to upshift or downshift, leading to poor acceleration and terrible fuel mileage.
- ✔ The transmission feels like it’s slipping or hesitating to engage from Park to Drive.
- ✔ Intermittent loss of communication with the module, causing unpredictable behavior.
From the Diagnostic Bay: The Case of the Intermittent Limp Mode
A local contractor brought in his ’11 Savana 3500 work van, complaining that it would randomly get stuck in 3rd gear, especially on hot days after a lot of stop-and-go driving. He’d already replaced a shift solenoid with no luck. After scanning it, I found a P0700 (Transmission Control System Malfunction) and a history of communication loss codes. Instead of throwing more parts at it, we tested the TCM. We found that heat soak was causing internal circuit failure. We installed one of our VIN-programmed T42 modules, and the problem was solved instantly. It’s a classic failure mode for these hard-working vans, and a new module is the only reliable fix.
Get Your Van Back to Work: A 30-Minute Installation Guide
Replacing the 2006-2014 Savana 3500 TCM is a straightforward job that most DIYers or any professional mechanic can complete quickly. No special programming tools are needed.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts and to help reset the vehicle’s electronic systems.
- Locate the Module: On the Savana and Express vans, the TCM is typically found in the engine compartment on the right-hand (passenger) side, mounted near the firewall.
- Disconnect and Remove: Carefully unclip the wiring harness connectors. Be gentle to avoid damaging the plastic tabs. Then, unbolt the module from its mounting bracket.
- Install the New TCM: Bolt the new, pre-programmed module into place. Reconnect the wiring harnesses, ensuring they click securely into position.
- Final Steps: Reconnect the negative battery terminal. Start the vehicle and let it idle for a few minutes. 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. Test drive the vehicle to confirm smooth shifting.
Verified Fitment for Your General Motors Vehicle
This T42 TCM is a direct replacement for part number 24230461 and other interchangeable numbers. While it’s a perfect fit for the Savana, it’s also compatible with a wide range of GM cars, trucks, and SUVs equipped with 4-speed automatic transmissions like the 4L60E, 4L65E, and 4L80E. Please verify your vehicle in the list below.
Partial Fitment List:
- GMC Savana 1500/2500/3500 Van (2006-2014)
- Chevrolet Express 1500/2500/3500 Van (2006-2014)
- Chevrolet Silverado & GMC Sierra (Select models 2007-2013)
- Chevrolet Tahoe, Suburban & GMC Yukon (Select models 2007-2009)
- Chevrolet Colorado & GMC Canyon (2008-2012)
- Hummer H3 (2008-2010)
- And many more GM models…
Frequently Asked Questions
Do I need to take my van to the dealer after installing this?
No. This module comes fully programmed to your vehicle’s VIN. It is a plug-and-play installation that does not require any additional programming or flashing from a dealership, saving you time and money.
Is this a new or used part?
This is an OEM-quality, tested component that has been expertly programmed with the latest GM software for your vehicle. It is backed by our one-year warranty for your peace of mind.
What tools do I need for the installation?
You’ll typically only need basic hand tools, such as a socket wrench set to remove the module’s mounting bolts and a flathead screwdriver to help with the connector clips if they are stiff.