Fix Your GMC Savana’s Shifting Problems for Good
As a mechanic with over two decades of diagnostic experience, I know how frustrating a faulty transmission can be, especially in a workhorse like the GMC Savana 1500. When your van is your livelihood, you can’t afford downtime caused by harsh shifting, getting stuck in gear, or a glowing check engine light. This T42 Transmission Control Module (TCM), part number 24239926, is the definitive solution, arriving pre-programmed to your van’s specific VIN for a true plug-and-play repair.
The TCM is the brain of your automatic transmission, controlling everything from shift points to torque converter lockup. When it fails, the symptoms can be alarming. But the fix doesn’t have to be a costly trip to the dealership. We handle the complex programming so you can handle the simple installation.
Is Your Savana Van Exhibiting These Telltale Signs?
A failing TCM often mimics other transmission problems. In my shop, I’ve seen these symptoms point directly to a bad module hundreds of times. Check if your vehicle is showing any of these classic indicators:
- ✔ Abrupt, jerky, or delayed gear shifts that make driving uncomfortable.
- ✔ The vehicle enters “limp mode,” often getting stuck in 2nd or 3rd gear.
- ✔ Check Engine Light or Transmission Warning 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 economy.
- ✔ Complete loss of communication with the module, preventing diagnostics.
Case Study: The Work Van That Wouldn’t Shift
A local contractor brought in his 2011 Savana 1500, complaining it was stuck in third gear. His mobile scanner pulled a P0700 (Transmission Control System Malfunction). He was worried he needed a full transmission rebuild, which would have put his van out of commission for days and cost thousands. After a quick diagnostic, I confirmed the TCM itself was the culprit—a common failure point. Instead of sending him to a dealer for a new module and programming, we ordered one of these pre-programmed units. It arrived the next day, I installed it in under 20 minutes, and he was back on the road to his next job. He saved over $500 and, more importantly, avoided critical business downtime.
Your Pre-Programmed Solution to a Complex Problem
The biggest hurdle in replacing a Savana 1500 Transmission Module has always been the expensive and time-consuming programming required at a GM dealership. We eliminate that step entirely. Simply provide us with your vehicle’s VIN during checkout, and our technicians will flash the module with the latest GM software specific to your van. It will be ready to install right out of the box, instantly restoring communication and proper function to your 4L60E, 4L65E, or 4L70E transmission.
Get Your Van Back to Work: A 30-Minute Installation Guide
This is a straightforward repair that a confident DIYer or any professional technician can complete quickly. For the 2006-2014 Savana Van, the TCM is conveniently located and easy to access.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent electrical shorts and help reset the system.
- Locate the Module: On the Savana, 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. Then, unbolt the module from its mounting bracket.
- Install the New Module: Bolt the new, pre-programmed TCM into place and securely reconnect the electrical harnesses. You should hear a click as they lock in.
- Final Steps: Reconnect the battery terminal. Start the vehicle and use a standard OBD2 scan tool to clear any stored fault codes from the previous module. Your van is now ready for a test drive.
Verified Fitment Across the GM Lineup
While this is the perfect fix for your Savana, this T42 TCM is also a direct replacement for a wide range of GM vehicles. This module is interchangeable with part numbers 24252114, 24234503, 24230461, 24239926, and more.
This part will fit these makes and models with these options:
SAVANA 1500 VAN 06-14 Transmission; (RH engine compartment)
EXPRESS 1500 VAN 06-14 Transmission; (RH engine compartment)
SAVANA 2500 VAN 06-14 Transmission; (RH engine compartment)
EXPRESS 2500 VAN 06-14 Transmission; (RH engine compartment)
SAVANA 3500 VAN 06-14 Transmission; (RH engine compartment)
EXPRESS 3500 VAN 06-14 Transmission; (RH engine compartment)
SILVERADO 1500 PICKUP 07 Transmission; (new style, smooth door skin), (next to battery)
SIERRA 1500 PICKUP 07 Transmission; (new style, smooth door skin), (next to battery)
SILVERADO 1500 PICKUP 08-13 Transmission; (next to battery), w/o hybrid option
SIERRA 1500 PICKUP 08-13 Transmission; (next to battery), w/o hybrid option
TAHOE 07-09 Transmission; (next to battery)
YUKON 07-09 Transmission; (next to battery)
… and many more GM cars, trucks, and SUVs from 2006-2014.
Frequently Asked Questions
Do I need to do any programming myself?
Absolutely not. This module is fully programmed to your vehicle’s VIN before it ships. It is a true plug-and-play solution, saving you a trip to the dealer.
Is this part difficult to install?
No, it’s one of the easier electronic module replacements. For a Savana van, it’s located in the engine bay and requires only basic hand tools. The entire process typically takes less than 30 minutes.
Will this fix a P0700 code?
A P0700 code indicates a general fault in the transmission control system. While it can be caused by other issues, a failing TCM is a very common root cause. Replacing a faulty module with this unit will resolve the issue.
What is your warranty policy?
We stand behind our parts with a one-year warranty, ensuring you receive a reliable and durable component that meets or exceeds OEM specifications.
Do I need to return my old part (core charge)?
No, there is no core charge for this part. You can keep or dispose of your old module without any hassle or extra fees.