Restore Peak Performance to Your Workhorse Van
If your 2006-2014 GMC Savana 3500 is experiencing frustrating transmission problems like harsh shifting, getting stuck in gear, or a persistent check engine light, a failing Transmission Control Module (TCM) is the most likely culprit. As the electronic brain of your automatic transmission, the TCM dictates every shift. When it fails, it can bring your work or personal vehicle to a standstill. This replacement T42 TCM, part number 24230461, is the definitive solution, arriving pre-programmed to your van’s specific VIN for a true plug-and-play repair.
Case Study: A Tricky Diagnosis
I remember a fleet manager bringing in a 2011 Savana 3500 work van that was driving his technicians crazy. The complaint was intermittent ‘slamming’ into gear and occasionally refusing to shift past 2nd. They had already replaced two shift solenoids based on the codes, but the problem persisted. After hooking up my pro-level scan tool and monitoring live data, I saw erratic voltage readings from the TCM itself, even when no hard codes were present. This pointed to an internal failure. We installed a VIN-programmed 2006-2014 Savana 3500 TCM, and the van has been running smoothly for over 50,000 miles since. It’s a classic case where chasing codes can be misleading; sometimes the controller itself is the root cause.
Is Your Savana Van Showing These Symptoms?
A faulty TCM can manifest in several ways. If you’re experiencing any of the following, it’s time to consider a replacement. This module is designed to resolve these exact issues.
- ✔ Harsh, erratic, or delayed gear shifts.
- ✔ Vehicle stuck in “limp mode” (usually 2nd or 3rd gear).
- ✔ Check Engine Light or Transmission Warning Light is illuminated.
- ✔ Diagnostic Trouble Codes (DTCs) stored, such as P0700 (Transmission Control System Malfunction), P0750-P0758 (Shift Solenoid errors), or other communication codes.
- ✔ Complete loss of shifting capability or failure to engage gears.
- ✔ Noticeable decrease in fuel economy.
A Straightforward Guide to Installation
Replacing the 2006-2014 Savana 3500 TCM is a job most DIYers or any professional mechanic can complete in under 30 minutes. Our VIN programming means you can skip the expensive trip to the dealership for flashing.
- 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 3500 Van, the TCM is typically found in the engine compartment on the right-hand (passenger) side.
- Disconnect and Remove: Carefully unplug the electrical connectors. Be gentle with the locking tabs. Then, unbolt the old 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.
- Final Steps: Reconnect the battery terminal. While the module is plug-and-play, it’s best practice to use a basic OBD2 scan tool to clear any old fault codes from the vehicle’s memory. Start the engine and test drive to confirm smooth shifting.
Verified Vehicle Compatibility
This T42 Transmission Control Module is a direct-fit replacement for a wide range of General Motors vehicles equipped with 4-speed automatic transmissions like the 4L60E, 4L65E, 4L70E, and 4L80E. While this page focuses on the 2006-2014 Savana 3500 TCM, this part also fits:
Chevrolet: Silverado, Tahoe, Suburban, Express, Avalanche, Cobalt, HHR, Impala, Monte Carlo, Colorado
GMC: Sierra, Yukon, Savana, Envoy, Canyon
Buick: LaCrosse, Lucerne, Rainier, Rendezvous
Cadillac: DTS
Pontiac: G5, G6, Grand Prix
And many other GM models from 2006-2014. Please verify your part number (24230461 or an interchange number like 24252114, 24234503) or use our vehicle selector to ensure perfect fitment.
Frequently Asked Questions
What does ‘VIN Programmed’ actually mean?
It means we load your vehicle’s unique Vehicle Identification Number (VIN) and the latest GM software onto the module before we ship it. This ensures it communicates perfectly with your van’s engine computer and other systems right out of the box, just like an OEM part from the dealer, but without the extra programming cost.
Is there a core charge for my old part?
No, there is absolutely no core charge. You can keep your old module or dispose of it at your convenience without any hassle or extra fees.
Will this fix a P0700 trouble code?
A P0700 code is a general fault request from the TCM to the main engine computer (ECM) to turn on the check engine light. While this module often resolves the underlying issue causing the P0700, it’s crucial to diagnose any other codes that are present alongside it (like solenoid or sensor codes) to confirm the TCM is the root cause.
What is the warranty on this part?
This transmission control module comes with a one-year warranty, covering any defects in materials or workmanship for your peace of mind.
Do I need any special tools for installation?
No special tools are required. Basic hand tools, such as a socket set to remove the mounting bolts, are all you need to complete the installation.