Restore Peak Transmission Performance to Your GMC Yukon XL 1500
Is your 2007 or 2008 GMC Yukon XL 1500 suffering from erratic shifting, getting stuck in gear, or displaying a persistent check engine light? These are classic symptoms of a failing Transmission Control Module (TCM). The TCM is the electronic brain of your automatic transmission, responsible for orchestrating smooth gear changes, managing torque converter lockup, and ensuring overall drivetrain efficiency. When it fails, it can mimic a catastrophic transmission failure, leading to costly misdiagnoses.
This genuine OEM-quality T42 TCM, part number 24235754, is the definitive solution to restore your vehicle’s factory performance. We eliminate the biggest hurdle in this repair: programming. Simply provide your vehicle’s VIN at checkout, and our technicians will flash the module with the latest GM-certified software specific to your Yukon XL. It arrives at your door ready for a true plug-and-play installation, saving you hundreds of dollars and the hassle of a dealership visit.
From the Diagnostic Bay
We recently had a 2008 Yukon XL 1500 come into the shop, stuck in what the owner called ‘safe mode’—it wouldn’t shift out of 3rd gear. The dashboard was lit up with a check engine light, and the owner was convinced he needed a full transmission rebuild. A quick scan revealed a P0700 (Transmission Control System Malfunction) code. Instead of immediately quoting a multi-thousand dollar repair, we inspected the TCM. After installing one of our pre-programmed T42 modules, all codes cleared, and the Yukon shifted as smoothly as it did the day it left the factory. It was a 30-minute fix that saved the customer a massive headache and expense.
Common Signs of a Failing TCM
- ✔ Harsh, jerky, or delayed shifting between gears.
- ✔ The vehicle getting stuck in a single gear, often referred to as “limp mode”.
- ✔ An illuminated Check Engine Light or Transmission Warning Light with codes like P0700, P0750, or other solenoid-related faults.
- ✔ Inability to upshift or downshift properly, leading to poor acceleration.
- ✔ A noticeable decrease in fuel economy due to inefficient transmission operation.
- ✔ Complete loss of communication with the transmission.
The Direct-Fit 2007-2008 Yukon XL TCM Solution
This module is not a one-size-fits-all part. It is specifically prepared for your vehicle. The VIN-specific programming ensures that all shift points, torque converter strategies, and diagnostic parameters are perfectly aligned with your Yukon XL’s powertrain configuration. This process corrects common software glitches and ensures seamless communication with the Engine Control Module (ECM) and other vehicle systems. Built to stringent OEM standards, this module is engineered for longevity and reliability, backed by our comprehensive one-year warranty.
Installation is straightforward for a confident DIYer. On the 2007-2008 Yukon XL 1500, the TCM is conveniently located in the engine compartment, typically next to the battery. The process involves disconnecting the battery, unplugging the electrical harnesses, removing a few bolts, and swapping the old unit for the new one. Once installed, simply reconnect the battery. Using a basic OBD2 scanner to clear any old codes is recommended. With no core charge, you can dispose of your old part without any hassle.
Don’t let a faulty module compromise the performance and safety of your truck. This replacement 2007-2008 Yukon XL TCM is the most effective and reliable way to get your vehicle back on the road. Order yours today and restore the smooth, dependable operation you expect from your GMC.
Frequently Asked Questions
What does a Transmission Control Module do?
The TCM acts as the central computer for your automatic transmission. It receives data from various sensors (like vehicle speed, engine RPM, and throttle position) to determine the optimal time to shift gears, control fluid pressure, and engage the torque converter clutch for maximum efficiency and smoothness.
Is this TCM difficult to install on my 2007 Yukon XL?
No, it’s a relatively simple process for someone with basic mechanical skills. The module is located in an accessible spot in the engine bay, usually next to the battery. The job requires only basic hand tools and can typically be completed in under 30 minutes. The key benefit is that our pre-programming eliminates any need for software setup after installation.
What does “VIN Programmed” mean for me?
It means the module arrives ready for immediate installation. We flash it with your vehicle’s specific factory software using your VIN. This ensures perfect compatibility and performance without requiring an expensive programming service from a dealership, saving you time and money.
Will this part fix a P0700 trouble code?
A P0700 code is a general fault code indicating that 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 of a P0700, it’s important to have the vehicle scanned for more specific transmission codes (e.g., P07xx series) to confirm the TCM is the issue.
Do I need to return my old TCM?
No. We do not require you to send back your old part. There is no core charge associated with this purchase, making the transaction simple and hassle-free.