Is Your GMC Yukon Shifting Erratically or Stuck in Limp Mode?
A faulty Transmission Control Module (TCM) can turn your reliable and comfortable Yukon into a source of constant stress. If you’re experiencing harsh gear changes, warning lights on the dash, or the vehicle refusing to shift properly, you’re not just dealing with a minor annoyance—you’re facing a problem that compromises performance, fuel economy, and safety. Don’t let a failing module dictate when and how you can drive. This pre-programmed T42 TCM is the definitive, professional-grade solution to get your SUV back to peak operational condition.
Common Symptoms & Your Solution
When the TCM in your Yukon begins to fail, the signs are often unmistakable. This module is the brain of your automatic transmission, and its failure can lead to a cascade of issues. If you’re noticing any of the following, it’s time for a replacement:
- Abrupt, harsh, or delayed shifting between gears
- The vehicle is stuck in one gear (often called “limp mode”)
- Check Engine Light or Transmission Warning Light is illuminated
- Diagnostic Trouble Codes (DTCs) like P0700, P0750, or other solenoid-related codes are present
- A sudden drop in fuel efficiency
- Complete failure to shift up or down
This unit is the direct-fit, plug-and-play answer to these problems. By replacing your faulty module with this expertly programmed 2007-2009 GMC Yukon TCM, you restore the precise, computer-controlled shifting your vehicle was designed for, eliminating frustrating symptoms and preventing further damage to your transmission.
Features & Real-World Benefits
- ✔ Plug & Play Installation: This module arrives pre-programmed to your Yukon’s specific Vehicle Identification Number (VIN). This means no expensive trips to the dealership for programming—simply install it and you’re ready to go.
- ✔ Restored Performance: By installing a module with the latest GM software updates, you ensure your transmission operates with optimal shift points, torque converter lockup, and pressure control for a smoother, more responsive drive.
- ✔ Solve Annoying Warning Lights: This is a direct solution for clearing persistent transmission-related DTCs that trigger the check engine light, allowing you to pass inspections and drive without worry.
- ✔ Built to OEM Standards: Engineered for durability and reliability, this module is designed to meet or exceed original equipment specifications, ensuring long-lasting performance for your daily commute or family road trips.
- ✔ This unit is backed by our one-year replacement warranty.: Drive with confidence knowing your purchase is protected against defects.
- ✔ No Core Charge: Keep your old part without the hassle or expense of returning a core. The price you see is the price you pay.
From Our Experts: Why VIN Programming is Non-Negotiable
“We often see customers consider generic, non-programmed modules to save a few dollars. For a sophisticated vehicle like a 2007-2009 Yukon, this is a critical mistake. The TCM communicates with the Engine Control Module (ECM), ABS, and other systems. Without the correct VIN-specific software, your transmission may never shift correctly, leading to poor performance, reduced fuel economy, and even long-term damage. Our process ensures the 2007-2009 GMC Yukon TCM you receive has the exact software calibration for your vehicle’s specific configuration, guaranteeing a seamless integration and restoring factory performance right out of the box.”
Frequently Asked Questions
Do I need to have this TCM programmed by a dealer?
No. We handle all the programming for you before shipment. Simply provide your vehicle’s VIN during checkout, and the module will arrive ready for a plug-and-play installation. This saves you hundreds of dollars and the hassle of a dealership visit.
Where is the TCM located on my 2007-2009 GMC Yukon?
On most 2007-2009 Yukon and Tahoe models, the Transmission Control Module is located in the engine bay, next to the battery. Installation is straightforward and typically takes less than 30 minutes with basic hand tools.
Will this part 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 root cause, it’s crucial to have the vehicle scanned for other, more specific codes (like P0750, P0751, etc.) to confirm the TCM is the issue. In many cases, replacing a faulty TCM will clear P0700 and related codes.
Is this compatible with other GM vehicles?
Yes, this T42 TCM is compatible with a wide range of GM trucks, vans, and SUVs from 2006-2014 that use 4-speed automatic transmissions like the 4L60E, 4L65E, and 4L70E. While this listing is specific to the 2007-2009 GMC Yukon TCM, it interchanges with numerous part numbers for models like the Silverado, Tahoe, Sierra, and Express.
What is the installation process?
It’s simple. First, disconnect the negative battery terminal. Then, locate the TCM in the engine compartment, unplug the electrical connectors, and unbolt the module. Install the new module, reconnect the connectors, and finally, reconnect the battery. It’s always a good practice to clear any remaining codes with a scan tool after installation.