Restore Peak Transmission Performance in Your GMC Yukon
Is your 2007, 2008, or 2009 GMC Yukon experiencing frustrating and unpredictable transmission problems? Symptoms like harsh, delayed shifting, getting stuck in limp mode, or an illuminated check engine light often point directly to a failing Transmission Control Module (TCM). As the central computer for your automatic transmission, the TCM dictates every gear change, manages torque converter lockup, and ensures your vehicle operates smoothly and efficiently. When it malfunctions, it can disrupt your entire driving experience.
This genuine GM T42 Transmission Control Module, service part number 24240449, is the definitive solution. We pre-program each module to your vehicle’s specific VIN, ensuring it arrives ready for a simple, plug-and-play installation. This critical step eliminates the need for costly and time-consuming dealership programming, getting you back on the road faster and with less hassle.
From the Diagnostic Bay
We recently worked on a 2008 Yukon XL that came in with a complaint of harsh 1-2 shifts and occasionally getting stuck in 3rd gear. The owner was convinced he needed a full transmission rebuild. However, our diagnostic scan pulled a P0752 code (Shift Solenoid ‘A’ Stuck On). While this points to a solenoid, experience tells us the driver circuit inside the TCM is a common failure point. Instead of starting with a costly internal repair, we installed a VIN-programmed T42 TCM. The result? The Yukon shifted perfectly on the test drive. The problem was never mechanical; it was the electronic brain failing to give the right commands. This saved the customer thousands of dollars and significant vehicle downtime.
Common Symptoms of a Faulty 2007-2009 Yukon TCM
- ✔ Harsh, erratic, or delayed gear shifts.
- ✔ Vehicle stuck in a single gear (limp mode), often 2nd or 3rd.
- ✔ Check Engine Light or Transmission Warning Light is on.
- ✔ Diagnostic Trouble Codes (DTCs) such as P0700, P0750, or other solenoid-related codes.
- ✔ Failure to upshift or downshift properly.
- ✔ Decreased fuel economy and potential for transmission overheating.
- ✔ Complete loss of communication with the transmission.
Plug-and-Play Reliability
The single most important feature of this module is our expert VIN programming service. We load the latest GM software updates specific to your Yukon, ensuring immediate compatibility and optimal transmission function. This process corrects common factory software issues and adapts the shift strategy perfectly to your vehicle’s powertrain. This isn’t just a replacement part; it’s a comprehensive solution for your vehicle’s transmission electronics. By installing this pre-programmed 2007-2009 Yukon TCM, you are restoring the precise electronic control necessary for longevity and performance.
Easy Installation and Broad Compatibility
Designed for a straightforward swap, this TCM is typically located in the engine compartment near the battery or under the air cleaner box. With basic hand tools, most owners can complete the installation in under 30 minutes. Simply disconnect the battery, swap the modules, and reconnect. No core charge means you don’t have to worry about the cost or hassle of returning your old part.
This T42 module is interchangeable with a wide range of part numbers, including 24252114, 24234503, 24230461, 24240400, and more, making it a versatile solution for numerous GM trucks, SUVs, and cars equipped with 4-speed automatic transmissions like the 4L60E, 4L65E, and 4L70E.
Frequently Asked Questions
What does “VIN Programmed” actually mean?
It means we flash the module with the specific software and calibration files from General Motors that match your vehicle’s unique Vehicle Identification Number (VIN). This makes the module electronically identical to the original, ensuring it communicates perfectly with your engine computer and other systems for flawless operation right out of the box.
Do I need any special tools for installation?
No special tools are required. Basic hand tools like a socket set are typically all you need to access and replace the module. The most important step is to disconnect the vehicle’s battery before you begin to ensure safety and help reset the vehicle’s electronic systems.
Will this fix a P0700 trouble code?
A P0700 code is a general code indicating the TCM has detected a fault. While this module often resolves the underlying issue causing the P0700 (like internal circuit failure or solenoid driver faults), you should have the vehicle scanned to retrieve any specific codes (e.g., P0752, P0757) to confirm the diagnosis. A faulty TCM is a very common cause for this code.
Is this a new or used part?
This is a high-quality, OEM-standard component that has been thoroughly inspected and prepared to ensure it meets or exceeds original factory specifications for performance and reliability. It comes with a one-year warranty for your peace of mind.
What happens if I continue driving with a bad TCM?
Continuing to drive with a faulty TCM can lead to more severe and expensive damage. Poor shifting can cause premature wear on clutches and bands inside the transmission, and incorrect line pressure can lead to overheating. This can eventually result in complete transmission failure, requiring a costly rebuild or replacement.