Restore Peak Performance to Your Trailblazer’s Transmission
Is your 2006-2009 Chevrolet Trailblazer suffering from erratic shifting, delayed gear engagement, or getting stuck in limp mode? These are classic signs 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 monitoring system health. When it fails, it can lead to poor performance, decreased fuel economy, and potentially catastrophic transmission damage. This OEM-quality T42 TCM, service part number 24234503, is the definitive solution to restore your vehicle’s drivability and reliability.
From the Diagnostic Bay
We had a 2008 Trailblazer come into the shop that was stuck in third gear. The check engine light was on, and the owner was frustrated after being told he might need a whole new transmission. We hooked up our scan tool and pulled code P0700 (Transmission Control System Malfunction). After a few quick electrical checks, we pinpointed the T42 module as the culprit. Instead of a multi-thousand-dollar transmission replacement, we installed one of our VIN-programmed modules. In under an hour, the codes were cleared, the vehicle was shifting perfectly through all gears, and the customer drove away with a reliable vehicle and significant savings.
Symptoms of a Failing Trailblazer TCM
- ✔ Harsh, clunky, or unpredictable gear shifts.
- ✔ The vehicle refuses to shift out of a single gear (limp mode).
- ✔ Check Engine Light or Transmission Warning Light is illuminated on the dashboard.
- ✔ Diagnostic Trouble Codes (DTCs) such as P0700, P0750, P0753, P0758, or other solenoid-related codes are present.
- ✔ A noticeable drop in fuel efficiency due to improper gear selection.
- ✔ The transmission seems to slip or hesitate when accelerating.
- ✔ Complete loss of communication with the transmission module.
Why Choose Our 2006-2009 Trailblazer Transmission Module?
This isn’t just a replacement part; it’s a complete, ready-to-install solution. We take the guesswork and extra expense out of the repair process. Each module is meticulously prepared to meet or exceed original equipment standards, ensuring a dependable and long-lasting fix for your vehicle. Our commitment to quality means you get a part that integrates seamlessly with your Trailblazer’s systems, restoring the smooth, confident performance you expect.
Key Features & Benefits
Plug-and-Play VIN Programming: The single biggest advantage is our complimentary VIN programming service. We flash the module with your vehicle’s specific Vehicle Identification Number and the latest GM software updates before it ships. This means no expensive trips to the dealership for programming. The module arrives ready for installation, ensuring perfect communication with your vehicle’s Engine Control Module (ECM) and other systems right out of the box.
Guaranteed Compatibility: This T42 TCM is a direct replacement for a wide range of GM vehicles and is interchangeable with numerous part numbers, including 24242391, 24252114, 24230461, 24239224, and more. It is engineered to control the 4L60E, 4L65E, and 4L70E automatic transmissions found in your Trailblazer, Envoy, Saab 9-7X, and many other GM trucks and SUVs from this era.
Effortless Installation: On most Trailblazer and Envoy models, the TCM is conveniently located in the engine compartment on the driver’s side, making it easily accessible. The replacement process 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. Reconnect everything, and you’re ready to go.
Frequently Asked Questions
Do I need to have this module programmed by a dealer?
No. We pre-program the module to your vehicle’s VIN before shipping. It arrives ready for a plug-and-play installation, saving you time and money on dealership programming fees.
Where is the TCM located on my 2007 Trailblazer?
On the 2006-2009 Trailblazer, as well as the GMC Envoy and Saab 9-7X, the Transmission Control Module is typically found in the engine compartment on the driver’s side (LH side), often near the firewall or strut tower.
Will this fix a P0700 trouble code?
A P0700 code is a general fault code indicating the TCM has detected a problem. While a faulty TCM is a very common cause, this code can also be triggered by other issues. However, if you are experiencing shifting problems along with this code, replacing the 2006-2009 Trailblazer Transmission Module is the most probable solution.
Is there a core charge for my old part?
No, we do not require a core return. You can keep your old module without any additional charges or hassle.
What is the warranty on this part?
This transmission control module comes with a one-year warranty, giving you peace of mind with your purchase.