Restore Your Pontiac Montana’s Shifting Performance
Are you experiencing frustrating and unpredictable transmission issues with your 2006-2009 Pontiac Montana? Symptoms like harsh shifting, getting stuck in gear, or a persistent check engine light can point directly to a failing Transmission Control Module (TCM). This genuine GM T42 TCM, part number 24240449, is the definitive solution to restore your vehicle’s drivability and reliability. As the electronic brain of your automatic transmission, the TCM is responsible for executing precise gear changes and managing torque converter operation. When it fails, the entire system’s performance is compromised.
From the Diagnostic Bay
We recently had a 2008 Uplander (which shares the same platform as the Montana) come into the shop. The owner had already spent a small fortune replacing multiple shift solenoids, chasing down intermittent shifting problems and a P0752 code (Shift Solenoid ‘A’ Stuck On). The van would drive fine for a few days, then start slamming into gear again. After checking the wiring and confirming the new solenoids were good, we focused on the TCM. We discovered the driver circuit inside the original module was failing under heat, causing the erratic commands to the solenoid. Installing a VIN-programmed T42 TCM solved the problem permanently, saving the customer from further guesswork and unnecessary repairs.
Symptoms of a Failing T42 TCM
A faulty transmission module can manifest in several ways. If you notice any of the following signs, it’s time to inspect your TCM:
- ✔ Harsh, erratic, or delayed gear shifts.
- ✔ Vehicle enters “limp mode,” often stuck in 2nd or 3rd gear.
- ✔ Check Engine Light or Transmission Warning Light is illuminated.
- ✔ Diagnostic Trouble Codes (DTCs) such as P0700, P0750, or other solenoid-related faults are present.
- ✔ Failure to upshift or downshift, leading to poor acceleration.
- ✔ Decreased fuel economy and potential transmission overheating.
The Superior Solution: A Programmed 2006-2009 Montana Transmission Module
Our T42 TCM offers a seamless repair experience. The key benefit is our complimentary VIN programming service. We flash the module with your vehicle’s specific identification number and the latest GM software updates before it ships. This ensures that the module communicates flawlessly with your vehicle’s engine computer and other systems right out of the box. You can bypass the expensive and time-consuming trip to the dealership for programming. This plug-and-play solution is engineered to meet and exceed original equipment standards, providing a dependable and long-lasting fix for your transmission woes.
This module is a direct replacement for a wide range of GM vehicles equipped with 4-speed automatic transmissions like the 4L60E, 4L65E, and 4L70E. While it is the perfect fit for your Pontiac Montana, it is also the correct part for dozens of other models, including the Chevrolet Impala, Silverado, Tahoe, GMC Sierra, Buick LaCrosse, and many more, making it a proven and reliable component across the GM lineup.
Simple Installation
Replacing the TCM is a straightforward job for a DIY mechanic. On the 2006-2009 Pontiac Montana, the module is typically located on the driver’s side strut tower in the engine compartment. Simply disconnect the battery, unplug the electrical connectors from the old module, unbolt it, and install the new one in its place. Once reconnected, your vehicle will be ready to go. We recommend clearing any stored DTCs with a scan tool after installation for a clean slate.
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, with no additional programming required.
Where is the TCM located on my 2007 Pontiac Montana?
The Transmission Control Module on the 2006-2009 Montana is typically found bolted to the driver’s side (LH) strut tower in the engine bay.
Will this part fix a P0700 trouble code?
A P0700 code is a general fault code indicating the TCM has detected a problem. While it doesn’t specify the exact issue, a failing TCM is a very common cause. Replacing the module often resolves the root problem that triggered the P0700 code.
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.
My original part number is different. Will this still work?
Yes, this module replaces numerous GM part numbers, including 24252114, 24234503, 24240400, and others. As long as your vehicle is listed in the compatibility chart, this VIN-programmed module is the correct replacement.