Restore Your Van’s Shifting Performance with a VIN-Programmed TCM
If your 2006-2014 GMC Savana 2500 Van is suffering from erratic shifting, getting stuck in gear, or throwing transmission codes, the culprit is often a failing Transmission Control Module (TCM). As the electronic brain of your automatic transmission (like the 4L80E), the T42 TCM governs every gear change and torque converter operation. When it fails, it can bring your workhorse van to a standstill. This replacement module, part number 24235340, is the reliable, cost-effective solution to get you back on the road without a costly trip to the dealership.
Case Study: A Tricky Diagnosis
I had a 2011 Savana 2500 from a local plumbing company come into my shop. The driver complained of intermittent, violent downshifts and occasional failure to shift out of 2nd gear after a hot restart. No single solenoid code was consistently present, just a general P0700 (Transmission Control System Malfunction). We checked the fluid, wiring harness, and solenoids—all looked fine. After hours of diagnostics, we traced the issue to heat-soak failure within the original TCM. The internal circuits were breaking down when the engine bay got hot. Replacing it with a pre-programmed T42 module like this one solved the problem instantly. The plumber was back in business the same day, saving significant downtime and diagnostic labor costs.
Is Your Savana Van Exhibiting These Transmission Issues?
A faulty TCM can manifest in several ways that are often misdiagnosed as internal transmission failure. Before you consider a costly transmission rebuild, check if your vehicle is showing these common signs.
- ✔ Harsh, banging shifts or delayed gear engagement.
- ✔ Vehicle is stuck in “limp mode” (typically 2nd or 3rd gear only).
- ✔ The Check Engine Light or Transmission Warning Light is on.
- ✔ Diagnostic Trouble Codes (DTCs) are present, such as P0700, P0750, or other solenoid-specific faults.
- ✔ Inconsistent or no upshifting/downshifting.
- ✔ A noticeable drop in fuel economy.
- ✔ Intermittent loss of communication with the TCM on a scan tool.
DIY-Friendly Installation: Get Your Van Back to Work
One of the biggest benefits of this module is its simple, plug-and-play installation. Because we program it to your van’s VIN before shipping, you don’t need any special scan tools or a trip to the dealer. The entire job can be done in your driveway in under 30 minutes.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent electrical shorts and reset the system.
- Locate the TCM: On the Savana 2500 Van, the TCM is typically found in the engine compartment on the right-hand (passenger) side.
- Remove the Old Module: Carefully unplug the electrical connectors. Then, unbolt the old TCM from its mounting bracket.
- Install the New Module: Bolt the new VIN-programmed TCM into place and securely reconnect the electrical connectors.
- Final Steps: Reconnect the battery terminal. Start the vehicle and allow it to idle for a few minutes. If you have a basic scan tool, clear any stored DTCs. Test drive to confirm smooth shifting.
Why Choose Our Pre-Programmed 2006-2014 Savana 2500 TCM?
This isn’t just a replacement part; it’s a complete solution designed for reliability and ease of use. It’s built to meet or exceed original equipment specifications and is backed by a one-year warranty for your peace of mind.
- ✔ VIN-Programmed for You: We load the latest GM software calibrated specifically to your van’s VIN. This ensures perfect communication with the engine computer and other modules for optimal performance right out of the box.
- ✔ Restores Smooth Operation: Eliminates the harsh shifting and performance issues caused by a failing module, protecting your transmission from further damage.
- ✔ No Core Charge: Keep your old part. There’s no need to worry about the hassle and expense of returning a core.
- ✔ Broad Compatibility: This T42 module is a direct replacement for multiple part numbers, including 24252114, 24234503, 24230461, 24234274, and more.
Verified Fitment Across the GM Lineup
While this is the perfect fit for your Savana Van, this versatile T42 TCM is also compatible with a wide range of other GM vehicles that use the 4L60E, 4L65E, 4L70E, and 4L80E transmissions. Key models include:
- Chevrolet Express / GMC Savana Vans (1500, 2500, 3500)
- Chevrolet Silverado / GMC Sierra Pickups
- Chevrolet Tahoe / GMC Yukon / Cadillac Escalade
- Chevrolet Colorado / GMC Canyon
- Chevrolet Impala, HHR, Cobalt
- Hummer H3, Buick LaCrosse, Pontiac G6, and many more.
Frequently Asked Questions
Do I need to take this part to a dealer for programming?
No. We pre-program the module to your vehicle’s specific VIN before it ships. It arrives ready for plug-and-play installation, with no additional programming required.
Where is the TCM located on my 2009 Savana 2500?
On most 2006-2014 Savana and Express vans, the Transmission Control Module (TCM) is located in the engine bay on the right-hand (passenger) side.
Will this fix a P0700 diagnostic trouble code?
A P0700 code is a general fault code indicating the TCM has detected a problem. If the TCM itself is the source of the fault (which is very common), then replacing it with this module will resolve the code and the underlying issue.
Is there a core charge for this part?
No, there is no core charge. You are not required to send your old part back, saving you time and shipping costs.
What kind of warranty is included?
This module comes with a comprehensive one-year warranty, giving you confidence in the quality and durability of your repair.