Is Your 2006 Trailblazer EXT Experiencing Transmission Problems?
If your Chevrolet Trailblazer EXT is suffering from harsh shifting, delayed gear engagement, or has suddenly entered a frustrating “limp mode,” a failing Transmission Control Module (TCM) is the most likely culprit. The TCM acts as the central computer for your automatic transmission, managing everything from shift points to torque converter lockup. When it fails, it can cause a cascade of performance issues, illuminate your check engine light, and make your vehicle unreliable. This genuine GM T42 Transmission Control Module, part number 24252114, is the definitive solution to restore your vehicle’s factory performance and drivability.
Expert Pro Tip
Before installing your new TCM, always disconnect the vehicle’s battery for at least 15 minutes. This not only ensures your safety but also helps clear any adaptive learning values from the old, faulty module. After installation, use a quality OBD2 scan tool to clear any stored Diagnostic Trouble Codes (DTCs) for a fresh start.
Diagnosing a Faulty 2006 Trailblazer EXT TCM
A failing transmission computer can manifest in several ways, often mistaken for internal transmission failure. By recognizing these specific symptoms, you can accurately diagnose the problem and avoid costly, unnecessary mechanical repairs. This module is the correct fix for these common issues.
Common Symptoms of TCM Failure
- ✔ Harsh, erratic, or delayed gear shifts that make driving uncomfortable.
- ✔ The vehicle gets stuck in a single gear (often 2nd or 3rd), a condition known as limp mode.
- ✔ Check Engine Light or Transmission Warning Light is illuminated on the dash.
- ✔ Diagnostic scans reveal transmission-related codes such as P0700, P0750, or other solenoid-specific faults.
- ✔ Complete failure to upshift or downshift, leading to poor acceleration and fuel economy.
- ✔ Intermittent loss of communication with the module, causing unpredictable performance.
The Plug-and-Play Solution: VIN Programmed for Your Vehicle
Forget expensive trips to the dealership for programming. We take care of the critical software setup before the part ever ships. When you order, we flash this module with your vehicle’s specific Vehicle Identification Number (VIN) and the latest GM-certified software updates. This ensures that the TCM is perfectly calibrated for your Trailblazer’s engine, transmission (like the 4L60E or 4L70E), and tire size. The result is a true plug-and-play installation that restores optimal shift strategy, fuel efficiency, and overall transmission health right out of the box.
This unit is a direct replacement for a wide range of service numbers, including 24234503, 24230461, 24242391, and many more, making it a versatile solution for numerous GM trucks and SUVs. Built to stringent OEM specifications, it guarantees reliability and longevity, backed by our one-year warranty.
Frequently Asked Questions
What does ‘VIN Programmed’ mean for my 2006 Trailblazer EXT TCM?
VIN programming means we load the module with your vehicle’s unique software profile based on its VIN. This ensures the TCM communicates correctly with your engine computer and other systems, controlling shift points and transmission functions exactly as the manufacturer intended. It eliminates the need for expensive dealership programming.
Is this part difficult to install myself?
For the 2006 Trailblazer EXT, the TCM is located in the left-hand (driver’s side) engine compartment, making it very accessible. Installation typically takes less than 30 minutes with basic hand tools. Simply disconnect the battery, unplug the electrical connectors from the old module, unbolt it, and install the new one in its place.
Will this module fix my specific transmission codes, like P0700?
Yes, this module is designed to resolve issues that cause codes like P0700 (Transmission Control System Malfunction), solenoid codes (e.g., P0751, P0756), and communication errors. If the fault lies within the module’s electronics, this replacement part is the correct solution.
Do I need to return my old TCM? Is there a core charge?
No, there is absolutely no core charge for this part. You can keep your old module or dispose of it at your convenience, saving you the time and hassle of shipping a core back.
How can I be sure this part fits my vehicle?
This T42 TCM fits a wide range of 2006-2014 GM vehicles. The provided fitment list is extensive. To be 100% certain, you can match the part number 24252114 (or any of the listed interchange numbers) to your existing unit or contact our expert support team with your VIN.