Is Your 2007-2008 GMC Yukon XL 1500 Shifting Erratically?
If you’re experiencing harsh shifting, delayed gear engagement, or your Yukon XL is stuck in ‘limp mode,’ a failing Transmission Control Module (TCM) is the likely culprit. The TCM is the electronic brain of your automatic transmission, responsible for orchestrating every gear change, managing torque converter lockup, and monitoring system health. When it fails, it can lead to a cascade of problems, from poor fuel economy to a complete inability to drive. Don’t let a faulty module sideline your reliable SUV. This OEM-quality T42 TCM, part number 24241806, is the definitive solution to restore your vehicle’s performance and peace of mind.
From the Diagnostic Bay
We recently had a 2008 Yukon XL 1500 come into the shop with the classic symptoms. The owner reported slamming into gear from a stop and an illuminated check engine light. A quick scan revealed code P0700 (Transmission Control System Malfunction) along with several solenoid-specific codes. Instead of chasing individual solenoids inside the transmission—a costly and often incorrect guess—we identified the root cause: a failing TCM. After installing one of our VIN-programmed T42 modules, we cleared the codes and took it for a test drive. The shifts were crisp and smooth, just like it had left the factory. The customer was back on the road in under an hour, avoiding a costly trip to the dealership and potential internal transmission damage.
The Ultimate Solution: A Pre-Programmed 2007-2008 Yukon XL TCM
Replacing a TCM used to mean a trip to the dealership for expensive programming. Our process eliminates that step entirely. We pre-program this module to your vehicle’s specific Vehicle Identification Number (VIN) before it ships. This ensures that it arrives ready for a true plug-and-play installation. It’s loaded with the latest GM software updates, which often correct factory flaws and improve transmission logic for better longevity and performance. By matching the module to your VIN, we guarantee seamless communication with your vehicle’s other computers, like the Engine Control Module (ECM), for optimal operation right out of the box.
Symptoms of a Failing T42 TCM
- ✔ Erratic and Harsh Shifting: Your Yukon may bang into gear, hesitate between shifts, or feel like it’s slipping.
- ✔ Stuck in Limp Mode: The transmission may refuse to shift out of a single gear (often 2nd or 3rd) to prevent further damage.
- ✔ Warning Lights: The Check Engine Light or a specific transmission warning light will often illuminate on the dashboard.
- ✔ Diagnostic Trouble Codes (DTCs): Common codes include P0700, P0750, P0751, and other solenoid circuit-related faults.
- ✔ No Upshift or Downshift: The vehicle may struggle to accelerate or fail to downshift when you slow down, causing a jerky ride.
- ✔ Poor Fuel Economy: Inefficient shifting and torque converter operation can lead to a noticeable drop in MPG.
- ✔ Complete Communication Loss: In severe cases, the module may fail completely, preventing the vehicle from starting or moving at all.
This module is a direct replacement for a wide range of GM vehicles equipped with 4-speed automatic transmissions like the 4L60E, 4L65E, and 4L70E. It is interchangeable with numerous part numbers, including 24252114, 24234503, 24230461, 24241806, and more, making it a versatile solution for many GM trucks, vans, and SUVs from 2006 to 2014.
Frequently Asked Questions
What is VIN programming and why is it important?
VIN programming involves loading your vehicle’s specific software and calibration files onto the module. This is critical because it ensures the TCM communicates correctly with your Yukon’s engine and other systems, accounting for its specific options and gear ratios. Without it, the transmission will not function correctly.
Do I need to take this part to a dealer after installation?
No. Because we pre-program the module to your VIN, no further dealership programming or relearn procedures are required. It is a plug-and-play solution, saving you time and money.
Is this a new or used part?
This is a high-quality, OEM-standard component that has been thoroughly inspected and prepared to meet or exceed original factory specifications. It comes with a one-year warranty for your protection.
Where is the TCM located on my 2007-2008 Yukon XL?
On the 2007-2008 GMC Yukon XL 1500, the Transmission Control Module is typically located in the engine compartment, next to the battery. Installation is straightforward and generally takes less than 30 minutes.
Will this fix my specific transmission problem?
This module is the definitive fix for issues caused by a faulty TCM, including the common symptoms listed above and related diagnostic codes. If your mechanic has diagnosed a bad transmission computer, this part will resolve the problem.