Restore Peak Transmission Performance in Your GM Vehicle
Is your 2006-2014 GMC Savana 2500 experiencing 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 gear changes, managing torque converter lockup, and monitoring system health. When it fails, it can cause a cascade of problems that affect drivability, fuel economy, and safety. This OEM-quality T42 Transmission Control Module, service part number 24239224, is the definitive solution to restore your vehicle’s smooth and reliable operation.
From the Diagnostic Bay
We had a 2011 Savana 2500 work van come into the shop with a complaint of harsh shifting and the transmission light on. The driver mentioned it felt like it was “banging” into gear. A quick scan pulled code P0700, which is a general transmission fault request. Digging deeper, we found several solenoid performance codes. While many might jump to replacing the solenoids inside the transmission pan, experience told us to check the TCM first. The T42 modules are known for developing internal faults that mimic solenoid issues. We swapped in a VIN-programmed module, cleared the codes, and the van shifted perfectly. The customer saved hundreds, if not thousands, by avoiding an unnecessary internal transmission repair.
Is Your Transmission Control Module Failing?
A faulty TCM can manifest in various ways, often being misdiagnosed as a mechanical transmission failure. Before considering a costly transmission rebuild, check for these common electronic symptoms. Replacing the TCM is often a faster, more affordable, and correct repair for these issues.
- ✔ Erratic Shifting: Experiencing harsh, delayed, or unpredictable gear changes that make driving uncomfortable and unsafe.
- ✔ Stuck in Limp Mode: The vehicle refuses to shift out of a single gear (usually 2nd or 3rd), a protective measure to prevent further damage.
- ✔ Warning Lights: The Check Engine Light or a specific transmission warning light is illuminated on your dashboard.
- ✔ Diagnostic Trouble Codes (DTCs): Common codes associated with a bad TCM include P0700, P0750, P0751, and other solenoid-related faults.
- ✔ Poor Fuel Economy: Inefficient shifting and torque converter operation caused by the faulty module can lead to a noticeable drop in MPG.
- ✔ No Communication: In severe cases, a scan tool may be unable to communicate with the TCM, indicating a complete module failure.
Why Choose Our Savana 2500 Transmission Module?
This isn’t just a replacement part; it’s a complete, ready-to-install solution for your Savana 2500 Transmission Module needs. We eliminate the guesswork and extra expenses typically associated with electronic component replacement. Our module is meticulously prepared to meet and exceed original factory specifications, ensuring a lasting repair.
Plug & Play Installation: The single greatest benefit is our complimentary VIN programming service. We flash the module with your vehicle’s specific Vehicle Identification Number and the latest GM software updates before it ships. This means no expensive trips to the dealership for programming. Simply install the part, connect the wiring harnesses, and you’re ready to go. It’s designed for a seamless, hassle-free installation process that can be completed in your own garage.
OEM-Standard Quality: Built to the same stringent standards as the original factory part, this T42 TCM ensures durability and reliability. It correctly manages all critical transmission functions, from shift points to line pressure, restoring the precise performance your vehicle was designed to deliver. Each unit comes with a one-year warranty for your peace of mind.
Broad Compatibility Across the GM Lineup
While this is a perfect fit for the 2006-2014 GMC Savana 2500, the T42 TCM was used in a wide array of GM vehicles equipped with 4-speed automatic transmissions like the 4L60E, 4L65E, 4L70E, and 4L80E. This module is a direct replacement for numerous part numbers, including 24252114, 24234503, 24230461, and more. It is also found in popular models such as:
- Chevrolet Silverado, Tahoe, Suburban, Express, Impala
- GMC Sierra, Yukon
- Cadillac DTS
- Buick LaCrosse, Lucerne
- Pontiac Grand Prix, G6
- Hummer H3
Simple Installation Process
Installation is straightforward for a DIY mechanic with basic tools. The module is typically located in the engine compartment. Common locations include the passenger side (RH) firewall, next to the battery, or under the air cleaner box. Always disconnect the negative battery terminal before beginning work. After installing the new module, reconnect the battery. While our programming handles the critical setup, it’s always a good practice to use a basic scan tool to clear any stored DTCs from other modules. With no core charge, you don’t have to worry about the cost or hassle of sending your old part back.
Frequently Asked Questions
What does ‘VIN Programmed’ mean for this Savana 2500 Transmission Module?
It means we load your vehicle’s specific VIN and the latest factory software onto the module before shipping. This ensures it communicates perfectly with your van’s other computers (like the ECU and BCM) right out of the box, eliminating the need for expensive dealer programming.
Will I need any special tools for installation?
No special tools are required. Basic hand tools like a socket set and ratchet are typically all that is needed to remove the mounting bolts and disconnect the wiring harnesses. The entire process usually takes less than 30 minutes.
Is this part compatible with other GM vehicles besides the Savana?
Yes, absolutely. This T42 TCM is compatible with a wide range of 2006-2014 GM trucks, vans, SUVs, and sedans that use a 4-speed automatic transmission. Please check the detailed fitment list on this page or contact us with your VIN to confirm compatibility.
How can I be sure the TCM is the problem and not the transmission itself?
While a professional diagnosis is best, common clues point to the TCM. If you have multiple solenoid-related error codes (e.g., P0751, P0756), intermittent electrical issues, or if a scan tool cannot communicate with the module, the TCM is the most likely culprit. Mechanical failures usually present with specific noises (whining, grinding) or slipping that is consistent, not erratic.
Do I need to return my old part?
No, there is no core charge for this part. You can keep your old module, which saves you the time, money, and hassle of packaging and shipping it back.