Restore Peak Transmission Performance in Your GMC Savana
Is your 2006-2014 GMC Savana 1500 struggling with erratic shifting, getting stuck in gear, or displaying a check engine light? These are classic signs of a failing Transmission Control Module (TCM). The TCM is the electronic brain of your automatic transmission, responsible for orchestrating every gear change and ensuring smooth, efficient operation. When it fails, it can lead to frustrating and potentially damaging driving conditions. This genuine GM T42 Transmission Control Module, service part number 24243921, is the definitive solution to restore your van’s drivability and reliability.
From the Diagnostic Bay
We had a 2011 Savana 2500 work van come into the shop, and the owner was at his wit’s end. His local mechanic had already replaced two shift solenoids trying to chase down a persistent P0752 (Shift Solenoid ‘A’ Stuck On) code, but the harsh 1-2 shift and intermittent limp mode wouldn’t go away. The van was crucial for his business, and the downtime was costing him money. After a quick scan and data stream analysis, we saw erratic command signals from the TCM. The solenoids were just following bad orders. We installed one of our VIN-programmed T42 modules, cleared the codes, and the van shifted perfectly on the test drive. The problem wasn’t the mechanical parts; it was the computer controlling them. This is a common scenario that highlights the importance of correctly diagnosing TCM failure.
Signs Your Savana 1500 TCM is Failing
A faulty TCM can manifest in various ways, often mimicking mechanical transmission problems. If you’re experiencing any of the following, your TCM is the likely culprit:
- ✔ Harsh or Delayed Shifting: Your van may slam into gear, hesitate before shifting, or feel like it’s slipping between gears.
- ✔ Stuck in Limp Mode: The transmission may refuse to shift out of a single gear (usually 2nd or 3rd) to prevent further damage.
- ✔ Warning Lights: The Check Engine Light or a specific transmission warning light will illuminate on your dashboard.
- ✔ Diagnostic Trouble Codes (DTCs): Common codes associated with TCM failure include P0700 (Transmission Control System Malfunction), U0101 (Lost Communication with TCM), and various solenoid-specific codes (P0750-P0774).
- ✔ Poor Fuel Economy: Inefficient shifting and torque converter lockup issues caused by a bad TCM can lead to a noticeable drop in MPG.
- ✔ Complete Loss of Shifting: In severe cases, the vehicle may not engage in Drive or Reverse at all.
The Plug-and-Play Solution: VIN Programmed for Your Van
Forget expensive dealership visits and complex programming procedures. Our key advantage is the pre-shipment VIN programming. When you order, you provide your vehicle’s 17-digit VIN, and we flash the module with the latest GM-certified software specific to your 2006-2014 Savana 1500. This ensures the TCM communicates flawlessly with your van’s Engine Control Module (ECM) and other systems right out of the box. This process eliminates compatibility issues and allows for a straightforward, plug-and-play installation.
Installation is Simple
For the GMC Savana 1500, the TCM is conveniently located in the engine compartment on the right-hand side. The replacement process is simple enough for a seasoned DIYer or any professional technician.
- Safety First: Disconnect the negative terminal from your vehicle’s battery.
- Locate the Module: Find the TCM on the RH side of the engine bay.
- Disconnect and Remove: Carefully unplug the electrical connectors and unbolt the old module from its mounting bracket.
- Install the New Module: Bolt the new, programmed TCM into place and securely reconnect the electrical harnesses.
- Final Steps: Reconnect the battery. While our programming handles the critical software, it’s always best practice to use a scan tool to clear any stored DTCs from the vehicle’s memory.
This module is a direct replacement for a wide range of GM part numbers, including 24252114, 24234503, 24243901, and more, making it a versatile solution for many GM trucks, vans, and SUVs equipped with 4-speed automatic transmissions like the 4L60E, 4L65E, and 4L70E.
Frequently Asked Questions
Do I need to take my van to the dealer for programming after installation?
No. This module arrives fully programmed to your vehicle’s specific VIN. The installation is plug-and-play, saving you the time, cost, and hassle of a dealership visit.
Where is the TCM located on a 2008 GMC Savana 1500?
On 2006-2014 GMC Savana vans, the Transmission Control Module (TCM) is typically found in the engine compartment, mounted on the right-hand (passenger) side.
Will this part fix a P0700 trouble code?
A P0700 code is a general fault code indicating the TCM has detected a problem and has requested the Check Engine Light to be turned on. While this module can resolve the underlying issue causing the P0700, it’s crucial to have the vehicle scanned for other transmission-specific codes (like solenoid or sensor codes) to confirm the TCM is the root cause.
Is this a new or used part?
This is a high-quality, OEM-standard component that has been expertly prepared and programmed to ensure it meets or exceeds original factory performance specifications. It is backed by our one-year warranty for your peace of mind.
Is there a core charge for my old TCM?
No, there is no core charge required for this part. You can keep your old module without the need to return it, simplifying the repair process for you.