Restore Peak Performance to Your Chevrolet Trailblazer
Is your 2006-2009 Chevrolet Trailblazer suffering from erratic shifting, getting stuck in gear, or displaying a check engine light with transmission codes? These are classic signs of a failing Transmission Control Module (TCM). The TCM is the electronic brain of your automatic transmission, responsible for orchestrating every gear change, managing torque converter lockup, and ensuring smooth, efficient operation. When it fails, it can mimic the symptoms of a catastrophic transmission failure, leading to costly misdiagnoses and unnecessary repairs.
This genuine-quality GM T42 Transmission Control Module, part number 24241806, is the definitive solution to restore your vehicle’s drivability. We take the guesswork and dealership hassle out of the equation by pre-programming the module to your vehicle’s specific VIN. This ensures that when it arrives, it’s a true plug-and-play component, ready for immediate installation without the need for expensive scan tools or a trip to the dealer for programming. Get your Trailblazer back on the road with the confidence of a perfectly functioning transmission.
From the Diagnostic Bay
We recently had a 2008 Trailblazer come into the shop with a classic ‘stuck in 3rd gear’ complaint. The owner had already been quoted over $2,500 for a transmission rebuild at another shop. After plugging in our scanner, we saw a flurry of solenoid communication error codes. Instead of condemning the transmission, we checked the TCM connectors for corrosion—they were clean. We knew the next logical step was the module itself. A quick swap with one of our pre-programmed T42 modules solved the problem instantly. The customer saved thousands of dollars by correctly identifying the electronic failure instead of jumping to a mechanical one. Always check the TCM first when you have multiple, seemingly random transmission codes.
Symptoms of a Failing Trailblazer Transmission Module
- ✔ Harsh & Erratic Shifting: Your vehicle may slam into gear, hesitate between shifts, or refuse to shift up or down smoothly.
- ✔ Limp Mode Activation: The transmission may default to a single gear (often 2nd or 3rd) to prevent further damage, severely limiting vehicle speed.
- ✔ Warning Lights: The Check Engine Light or a dedicated transmission warning light will illuminate on your dashboard.
- ✔ Diagnostic Trouble Codes (DTCs): You’ll likely see codes such as P0700 (Transmission Control System Malfunction) or various solenoid-specific codes (e.g., P0750, P0753, P0758).
- ✔ Poor Fuel Economy: Inefficient shifting and incorrect torque converter lockup can cause a noticeable drop in your MPG.
- ✔ No Communication: In severe cases, a scan tool may be unable to communicate with the TCM, indicating a complete module failure.
Why Choose Our VIN-Programmed T42 TCM?
Replacing your Trailblazer Transmission Module is about more than just swapping a part; it’s about restoring a critical system to factory specifications. Our modules are meticulously prepared to ensure a successful repair every time. We load the latest GM-certified software directly onto the module using your vehicle’s VIN. This process calibrates the TCM to your specific engine, transmission, and tire size, guaranteeing optimal shift points, fuel efficiency, and longevity. This is the same procedure a dealership performs, but completed before we ship, saving you time and money.
This module is a direct replacement for a wide range of original part numbers, including 24252114, 24234503, 24230461, and many more, making it a versatile solution for numerous GM trucks and SUVs. Built to meet or exceed OEM standards and backed by a one-year warranty, it’s a reliable investment in your vehicle’s health.
Simple, Straightforward Installation
Installation can typically be completed in under 30 minutes with basic hand tools. On most Trailblazer and Envoy models, the TCM is conveniently located in the engine compartment on the driver’s side. Before you begin, it’s crucial to disconnect the vehicle’s battery. This not only ensures your safety but also helps reset the vehicle’s related electronic systems. After installing the new module and reconnecting the battery, use a basic OBD2 scanner to clear any stored DTCs. Best of all, there is no core charge, so you don’t have to worry about the cost or hassle of sending your old part back.
Frequently Asked Questions
What is VIN programming and why is it necessary?
VIN programming is the process of loading your vehicle’s specific software onto the TCM. This software tells the module about your Trailblazer’s unique configuration (engine size, gear ratios, etc.). Without it, the transmission will not shift correctly. Our pre-programming service makes this a plug-and-play part, avoiding a mandatory trip to the dealership.
Will this fix my specific transmission problem?
This module is a common solution for electronic-related shifting issues, limp mode, and specific DTCs like P0700 and solenoid circuit faults. If your transmission has internal mechanical damage (like burnt clutches or a bad valve body), a new TCM will not resolve the issue. A proper diagnosis is key.
Where is the TCM located on my 2007 Trailblazer?
On the 2006-2009 Trailblazer, Envoy, and Saab 9-7X, the Transmission Control Module is typically found in the engine compartment on the driver’s side (LH), often near the firewall or strut tower.
Do I need any special tools for installation?
No special tools are required. Basic hand tools like a socket set will be sufficient to remove the mounting bolts and disconnect the electrical connectors. A simple OBD2 scan tool is recommended to clear any codes after installation is complete.
Is this compatible with other GM vehicles?
Yes, this T42 TCM is compatible with a vast range of 2006-2014 GM vehicles equipped with 4-speed automatic transmissions like the 4L60E, 4L65E, and 4L70E. This includes models like the Silverado, Tahoe, Yukon, Express, Impala, and many more. Please check the fitment list to confirm for your specific vehicle.