Restore Smooth Shifting to Your Chevrolet Tahoe
If you’re dealing with the headaches of a faulty transmission—harsh shifts, getting stuck in gear, or a persistent check engine light—you’re not alone. In my 20+ years of experience, I’ve seen countless GM trucks and SUVs, especially the 2007-2009 Tahoe, come into the shop with these exact issues. More often than not, the culprit is a failing Transmission Control Module (TCM). This T42 series TCM, part number 24235754, is the definitive solution to get your vehicle’s transmission operating like new again. It’s not just a part; it’s peace of mind in a box.
This module is the brain of your automatic transmission, controlling everything from shift points and line pressure to torque converter lockup. When it fails, communication breaks down, leading to the unpredictable and often unsafe performance you’re experiencing. We take the guesswork and high dealership costs out of the repair by pre-programming this module to your vehicle’s specific VIN. This ensures it works seamlessly with your Tahoe’s 4L60E, 4L65E, or 4L70E transmission right out of the box, with no need for an expensive trip to the dealer for programming.
From the Diagnostic Bay: The Misleading Solenoid Code
A customer brought in his 2008 Tahoe, convinced he needed a new shift solenoid. His scanner was showing a P0750-range code, and the transmission was shifting erratically. We could have just replaced the solenoid, but experience told me to dig deeper. After checking the wiring harness for continuity, we tested the TCM itself. We found that the module’s driver for that solenoid circuit had failed internally. We installed one of our VIN-programmed T42 modules, cleared the codes, and the truck shifted perfectly. The customer saved hundreds on what would have been an incorrect repair and unnecessary internal transmission work. This highlights why a failing TCM is often the root cause, even when symptoms point elsewhere.
Is Your Tahoe Showing These Warning Signs?
A failing TCM can manifest in several ways. If you’re noticing any of the following, it’s a strong indicator that your module needs replacement. Addressing it now with a reliable 2007-2009 Tahoe Transmission Module can prevent more severe, and costly, damage to your transmission’s mechanical components.
- ✔ Harsh, jerky, or delayed gear shifts.
- ✔ The vehicle is stuck in “limp mode” (usually 2nd or 3rd gear).
- ✔ Check Engine Light or Transmission Warning Light is on.
- ✔ Diagnostic Trouble Codes (DTCs) are present, such as the general P0700 or specific solenoid codes (e.g., P0751, P0756).
- ✔ Failure to upshift or downshift properly.
- ✔ A noticeable decrease in fuel economy.
- ✔ The transmission seems to slip out of gear.
A Straightforward Guide to Installation
One of the best features of this part is its simple, DIY-friendly installation. You don’t need to be a master mechanic to get this job done in your own driveway in under 30 minutes.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts and to help reset the system.
- Locate the Module: On most 2007-2009 Tahoes, the TCM is conveniently located in the engine compartment, right next to the battery.
- Disconnect and Remove: Carefully unplug the electrical connectors from the old module. Then, unbolt it from its mounting bracket.
- Install the New Module: Bolt the new, pre-programmed TCM into place. Reconnect the electrical connectors, ensuring they click securely into place.
- Final Steps: Reconnect the battery terminal. While our programming handles the critical setup, it’s always good practice to use a basic OBD2 scan tool to clear any stored fault codes. Start the vehicle and enjoy the restored performance.
Verified Vehicle Compatibility List
This T42 TCM is a direct replacement for a wide range of General Motors vehicles. While this page focuses on the 2007-2009 Tahoe Transmission Module, please verify your specific model and year below. This module interchanges with part numbers 24252114, 24234503, 24235754, and others.
Fits Models Including:
- Chevrolet Tahoe: 2007-2009 (next to battery)
- Chevrolet Silverado 1500: 2007-2013 (next to battery)
- GMC Yukon / Yukon XL 1500: 2007-2009 (next to battery)
- GMC Sierra 1500: 2007-2013 (next to battery)
- Chevrolet Avalanche 1500: 2007-2008 (next to battery)
- Chevrolet Express / GMC Savana Vans: 2006-2014 (RH engine compartment)
- Cadillac DTS: 2006-2011 (RH front engine compartment)
- Buick Lucerne: 2006-2011 (LH engine compartment)
- And many more GM cars, trucks, and SUVs from 2006-2014.
Do I need to get this module programmed by a dealer?
Do I need to get this module programmed by a dealer?
No. We handle all the programming for you. Simply provide your vehicle’s VIN during checkout, and the module will arrive ready for plug-and-play installation, saving you time and money.
Is there a core charge for my old part?
No, there is no core charge. You can keep your old part or dispose of it without the hassle of shipping it back to us.
What if I install it and still have problems?
Our modules are rigorously tested and come with a one-year warranty. If you still experience issues, it may indicate another problem with the vehicle (e.g., wiring, solenoids). Our expert support team is here to help you troubleshoot.
How do I know this is the exact part I need?
You can match the part number 24235754 (or any of the interchangeable numbers listed) from your original module. You can also use our vehicle fitment tool or contact us with your VIN, and we will guarantee compatibility.
Will this fix a P0700 diagnostic trouble code?
Yes, in many cases. A P0700 code is a general fault request from the TCM to the Engine Control Module (ECM) to turn on the check engine light. A failing TCM is a very common cause for this code, and replacing it often resolves the issue.