Is Your GMC Yukon Experiencing Transmission Problems?
If your 2007, 2008, or 2009 GMC Yukon is suffering from harsh shifting, getting stuck in gear, or displaying transmission-related error codes, a faulty Transmission Control Module (TCM) is the most likely culprit. The TCM is the electronic brain of your automatic transmission, responsible for every gear change and torque converter operation. When it fails, it can cripple your vehicle’s performance and leave you stranded. This genuine GM T42 Transmission Control Module, service part number 24235753, is the definitive solution to restore your vehicle’s factory performance and reliability.
From the Diagnostic Bay
We had a 2008 Yukon come into the shop that was permanently stuck in third gear—a classic ‘limp mode’ case. The owner was frustrated, having been quoted a massive bill for a full transmission rebuild at another shop. After a quick scan, we saw several solenoid circuit codes pointing to an internal TCM failure. Instead of a costly mechanical repair, we installed one of our VIN-programmed T42 modules. In under 30 minutes, the Yukon was shifting perfectly through all gears, the check engine light was off, and the customer saved thousands. It’s a textbook example of how a targeted electronic fix can solve what seems like a catastrophic mechanical problem.
Symptoms of a Failing Yukon Transmission Control Module
A failing TCM can manifest in several ways, often mimicking more severe mechanical transmission issues. Before considering expensive internal repairs, check if your vehicle is exhibiting any of these common symptoms:
- ✔ Harsh, erratic, or delayed gear shifts that make driving uncomfortable and unpredictable.
- ✔ The vehicle enters ‘limp mode,’ often getting stuck in 2nd or 3rd gear to prevent further damage.
- ✔ The Check Engine Light or a dedicated transmission warning light illuminates on your dashboard.
- ✔ Diagnostic Trouble Codes (DTCs) are stored, such as P0700 (Transmission Control System Malfunction) or various solenoid-specific codes (e.g., P0751, P0756).
- ✔ Complete failure to upshift or downshift, leading to poor acceleration and high RPMs.
- ✔ A noticeable decrease in fuel economy as the transmission operates inefficiently.
- ✔ Intermittent loss of communication with the TCM, causing unpredictable behavior.
The Plug-and-Play Solution: VIN Programming Included
Dealerships often require you to purchase a blank module and then pay for expensive programming and calibration. Our T42 TCMs eliminate that step entirely. We pre-program each module to your vehicle’s specific Vehicle Identification Number (VIN) before it ships. This process loads the latest GM software and calibrations for your exact vehicle configuration, ensuring a seamless, plug-and-play installation. There is no need for additional tools or trips to the dealer. Once installed, your vehicle will recognize the new module as its own, restoring precise shift patterns and communication between the engine and transmission.
Your Direct-Fit 2007-2009 Yukon Transmission Control Module
This module is not a generic, one-size-fits-all part. It is an OEM-quality component designed to meet or exceed General Motors’ specifications for durability and performance. It directly replaces a wide range of original part numbers, including 24242391, 24234503, and 24252114, making it the ideal choice for your repair. By managing shift solenoid activation, line pressure, and torque converter lockup with precision, this module ensures your 4-speed automatic transmission (like the 4L60E, 4L65E, or 4L70E) operates with the smoothness and efficiency you expect. Built with high-quality components and backed by a one-year warranty, you can drive with confidence knowing your transmission is in good hands.
Simple Installation to Get You Back on the Road
Designed for straightforward installation, this TCM can be replaced with basic hand tools in under an hour. On most GMC Yukon, Chevrolet Tahoe, and Silverado models from this era, the module is conveniently located in the engine bay, often next to the battery or under the air cleaner box. Simply disconnect the vehicle’s battery, unplug the electrical connectors from the old module, unbolt it, and install the new one in its place. After reconnecting the battery, the pre-programmed module is ready to go. We recommend using a scan tool to clear any old fault codes from the system’s memory after installation. Best of all, there is no core charge, so you don’t have to worry about the cost or hassle of sending your old part back.
Frequently Asked Questions
What is VIN programming and why is it important?
VIN programming is the process of loading your vehicle’s specific software and calibration files onto the module. This ensures the TCM communicates correctly with your Yukon’s engine controller and other systems, resulting in proper shift points, torque converter operation, and fuel efficiency. Without it, the module will not function correctly.
Is this a difficult part to install myself?
For most individuals with basic mechanical skills, this is a very manageable DIY repair. The module is typically located in an accessible part of the engine bay and requires only simple tools to replace. Since our modules are pre-programmed, the most complex part of the job is already done for you.
Will this module fix my 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 often resolves the root cause (like an internal TCM short or solenoid driver failure), it’s important to diagnose any other specific codes that accompany the P0700 to confirm the TCM is the source of the issue.
Do I need to return my old TCM?
No. We do not require you to return your old part. There is no core charge associated with this purchase, saving you time and money on return shipping.
How do I know this TCM is compatible with my vehicle?
This T42 TCM is compatible with a wide range of 2006-2014 GM vehicles equipped with 4-speed automatic transmissions. The best way to confirm fitment is to match your original part number to one of the service numbers listed (e.g., 24235753, 24252114). You can also use our vehicle fitment tool or contact our expert support team with your VIN.