Get Your Workhorse Back on the Road: A Reliable Fix for Your Savana Van’s Transmission
For a business owner, a work van like the GMC Savana 3500 isn’t just a vehicle; it’s a critical tool. When your transmission starts acting up—slipping gears, shifting harshly, or getting stuck in limp mode—it means downtime, delayed jobs, and lost revenue. This T42 Transmission Control Module (TCM), part number 24234274, is the definitive solution to restore the dependable performance your 2006-2014 Savana 3500 Van needs. As the electronic brain of your 4L80E or other compatible GM automatic transmission, this module governs every shift, ensuring your van runs smoothly and efficiently, day in and day out.
What sets our modules apart is the pre-configuration service. We program each Savana 3500 Van TCM to your vehicle’s specific VIN before it ships. This means no expensive trips to the dealership for programming. It arrives at your door ready for a true plug-and-play installation, getting your van back in service with minimal delay.
From the Diagnostic Bay: The Case of the Limping Fleet Van
I remember a local contractor bringing in his 2011 Savana 3500. The van was randomly dropping into limp mode (stuck in 3rd gear), making highway driving impossible and city routes a nightmare. His scanner showed a generic P0700 code. After 20 years in the business, I know that P0700 is just the messenger; the real culprit is often the TCM itself. Internal circuit failure due to heat and vibration is the most common cause I see. We ordered a VIN-programmed module. The swap took less than 20 minutes, and the van was back on the road the same afternoon, shifting perfectly. He avoided a costly dealership visit and, more importantly, got his primary work vehicle back immediately.
Is Your Savana Van Showing These Transmission Problems?
A failing TCM can manifest in several ways. If you’re experiencing any of the following, it’s a strong indicator that your module needs attention:
- ✔ Harsh, erratic, or delayed gear shifts that make driving uncomfortable.
- ✔ The vehicle is stuck in “limp mode,” usually in 2nd or 3rd gear, with limited power.
- ✔ Check Engine Light or Transmission Warning Light is illuminated on the dash.
- ✔ Diagnostic Trouble Codes (DTCs) are present, such as P0700 (Transmission Control System Malfunction), P0750-P0758 (Shift Solenoid Errors), or other communication codes.
- ✔ A noticeable drop in fuel economy as the transmission operates inefficiently.
- ✔ The transmission seems to slip out of gear or fails to engage properly from Park or Neutral.
DIY Installation: Get Your Van Back to Work in Under 30 Minutes
Replacing the Savana 3500 Van TCM is a straightforward job that most DIYers or fleet mechanics can handle with basic tools. Because it’s pre-programmed, you skip the hardest part of the process.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts and to help reset the system.
- Locate the Module: On the Savana 2500/3500 vans, the TCM is typically located in the engine compartment on the right-hand (passenger) side.
- Disconnect and Remove: Carefully unplug the electrical connectors. Press the release tabs firmly. Then, unbolt the module from its mounting bracket.
- Install the New Module: Mount the new, pre-programmed TCM in the same location and securely fasten the bolts. Reconnect the electrical harnesses, ensuring they click into place.
- Final Steps: Reconnect the battery terminal. Start the vehicle and let it idle for a few minutes. While not always necessary, using a basic scan tool to clear any stored fault codes is a good final step.
Verified Vehicle Compatibility
This T42 TCM is a direct replacement for a wide range of General Motors vehicles equipped with 4-speed automatic transmissions. While this page is focused on the Savana 3500 Van TCM, it also fits the following models. Always confirm your part number and vehicle details.
- GMC: Savana 1500/2500/3500 Van (2006-2014), Sierra 1500/2500, Yukon, Yukon XL, Envoy, Canyon
- Chevrolet: Express 1500/2500/3500 Van (2006-2014), Silverado 1500/2500, Tahoe, Suburban, Avalanche, Impala, Monte Carlo, Cobalt, HHR, Colorado, SSR
- Buick: LaCrosse, Lucerne, Allure, Rainier, Rendezvous, Terraza
- Cadillac: DTS
- Pontiac: G5, G6, Grand Prix, Pursuit, Montana
- Saturn: Vue, Aura, Ion
- Hummer: H3
- Saab: 9-7X
Frequently Asked Questions
What does “VIN Programmed” actually mean?
It means we load the module with the specific software and calibration files from GM that match your vehicle’s unique Vehicle Identification Number (VIN). This ensures it communicates perfectly with your engine computer and other systems right out of the box, just like a part from the dealer.
Do I need to return my old TCM?
No, there is no core charge or need to send your old part back to us. You can dispose of it or keep it, making the process hassle-free for you.
Will this part fix a P0700 trouble code?
A P0700 code indicates a general fault in the transmission control system. While a failing TCM is a very common cause, the code can also be triggered by faulty wiring or internal transmission components. However, if you’re also experiencing symptoms like erratic shifting or limp mode, replacing the TCM is the most probable solution.
Is this a new or used part?
This is a high-quality, OEM-standard replacement part that has been expertly inspected and programmed to ensure reliability. It is backed by our one-year warranty for your peace of mind.
What if I have questions during installation?
We pride ourselves on expert support. If you have any questions, our team of experienced automotive professionals is here to help guide you through the process.