Restore Your Trailblazer’s Drivability and Performance
If your 2006-2009 Chevrolet Trailblazer is suffering from erratic shifting, getting stuck in gear, or has an illuminated check engine light, a failing Transmission Control Module (TCM) is the most likely culprit. As a mechanic with over two decades of experience, I’ve seen how a faulty TCM can make a reliable SUV feel unpredictable and unsafe. This T42 Transmission Control Module, part number 24241806, is the definitive solution to restore the crisp, smooth shifting your vehicle had when it was new.
The core of the problem often lies in the module’s inability to correctly interpret sensor data and command the transmission’s solenoids. This leads to the frustrating symptoms you’re experiencing. Our solution is a high-quality replacement 2006-2009 Trailblazer TCM that comes pre-programmed to your vehicle’s specific VIN. This crucial step eliminates the need for expensive dealership programming, making it a true plug-and-play fix for both professional technicians and DIY enthusiasts.
Case Study: A Tricky Diagnosis
A customer brought in their ’07 Trailblazer with an intermittent ‘limp mode’ issue. It would get stuck in 3rd gear without warning, but no consistent codes were stored besides a general P0700 (Transmission Control System Malfunction). Another shop had quoted them for a full transmission rebuild. After a thorough diagnostic, I suspected the TCM. Heat and vibration can cause internal solder joints to fail over time, creating these exact intermittent electrical faults. We swapped in one of our VIN-programmed T42 modules, and the problem was solved instantly. The customer saved thousands and got their reliable daily driver back on the road the same day.
Is Your Trailblazer Exhibiting These Transmission Issues?
A failing TCM will give you clear warning signs. If you’re noticing any of the following, it’s time to consider a replacement:
- âś” Harsh, slamming shifts or delayed gear engagement.
- âś” The vehicle is stuck in a single gear (often called ‘limp mode’).
- âś” Check Engine Light is on with transmission-related Diagnostic Trouble Codes (DTCs) like P0700, P0750, P0753, P0758, etc.
- âś” Complete loss of upshifting or downshifting capabilities.
- âś” A noticeable drop in fuel economy.
- âś” The transmission seems to slip between gears.
A Straightforward Guide to Installation
Replacing the 2006-2009 Trailblazer TCM is a job most owners can handle in their own garage in under 30 minutes. No specialized tools are required.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- Locate the Module: On the 2006-2009 Trailblazer, the TCM is conveniently located in the engine compartment on the driver’s side (LH).
- Disconnect and Remove: Carefully unplug the electrical connectors. Use a socket wrench to remove the bolts holding the module to its bracket.
- Install the New TCM: Mount the new module in the same location and securely fasten the bolts. Reconnect the electrical connectors, ensuring they click into place.
- Final Steps: Reconnect the battery terminal. While our VIN programming handles the critical setup, it’s good practice to use a basic OBD2 scan tool to clear any lingering fault codes from the vehicle’s memory.
Verified Compatibility for Your GM Vehicle
This module is a direct replacement for part number 24241806 and other interchangeable numbers. It is guaranteed to fit the following models and more:
- âś” Chevrolet Trailblazer: 2006, 2007, 2008, 2009 (8-cylinder and standard models)
- âś” GMC Envoy / Envoy XL: 2006-2009
- âś” Chevrolet Silverado & GMC Sierra 1500/2500: 2007-2013
- âś” Chevrolet Tahoe & GMC Yukon: 2007-2009
- âś” Chevrolet Impala: 2006-2011
- âś” Hummer H3: 2008-2010
Frequently Asked Questions
Frequently Asked Questions
Do I need to take this part to a dealer for programming?
Absolutely not. We program the module to your vehicle’s VIN before it ships. It arrives ready for immediate installation, saving you time and money.
Where is the TCM located on my 2008 Trailblazer?
You will find the Transmission Control Module in the engine compartment on the driver’s side (LH side).
Will this fix a P0700 trouble code?
While a P0700 code is a general transmission fault indicator, it is very commonly triggered by a failing TCM. Replacing the module is a primary and effective solution for this code when accompanied by shifting symptoms.
Is there a core charge for my old part?
No, there is no core charge. You can keep your old module without any hassle or need to return it.
What kind of warranty is included?
This module is backed by our one-year warranty, giving you peace of mind and confidence in your repair.
Don’t let a faulty TCM sideline your vehicle. By choosing our pre-programmed 2006-2009 Trailblazer TCM, you’re not just buying a part; you’re buying a reliable, long-term fix. Order yours today and get back to confident driving.