Is Your Pontiac Montana’s Transmission Acting Up?
If you’re dealing with a Pontiac Montana that refuses to shift correctly, gets stuck in gear, or has a persistent check engine light, you’re not alone. These are classic signs of a failing Transmission Control Module (TCM). As the electronic brain of your automatic transmission, the TCM is responsible for every gear change. When it fails, it can make your reliable family minivan feel unpredictable and unsafe. If your minivan is showing signs of transmission trouble, a faulty 2006-2009 Montana TCM is often the culprit.
A Story From the Shop Floor
“Just last month, a 2008 Montana was towed to my shop. The owner was frustratedโit wouldn’t shift past 2nd gear, and the check engine light was glaring. A quick scan pulled a P0752 for a stuck shift solenoid. While many would jump to replace the solenoid inside the transmission, my 20+ years of experience pointed elsewhere. After checking the wiring, I knew the T42 module, exposed to years of engine bay heat and vibration on the strut tower, was the real issue. A new, programmed module had them back on the road in under an hour, saving them from a costly and unnecessary internal transmission repair.”
The Direct Solution: VIN-Programmed for Your Montana
This T42 Transmission Control Module is the definitive, hassle-free solution. We take the guesswork and extra cost out of the repair by pre-programming the module to your vehicle’s specific VIN. This means it arrives at your door ready for a true plug-and-play installation. You get a part that communicates perfectly with your vehicle’s engine computer and other systems from the moment it’s connected, restoring the smooth, efficient performance you expect.
Symptoms This Part Corrects:
- โ Harsh, slamming, or erratic gear shifts.
- โ Vehicle stuck in “limp mode” (usually 2nd or 3rd gear).
- โ Delayed engagement when shifting from Park to Drive or Reverse.
- โ Check Engine Light or Transmission Warning Light is on.
- โ Diagnostic Trouble Codes (DTCs) like P0700, P0750, P0751, P0752, or other solenoid-related codes.
- โ Poor fuel economy due to incorrect gear selection.
Plug-and-Play Installation: No Dealer Visit Required
Replacing the 2006-2009 Montana TCM is a straightforward job that most DIY mechanics can handle in their own driveway. For the Pontiac Montana, the module is conveniently located.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electronic component replacement.
- Locate the Module: On the 2006-2009 Montana, you will find the TCM mounted on the driver’s side (LH) strut tower in the engine bay.
- Disconnect and Remove: Carefully unplug the electrical connectors. Note the locking tabs to avoid damage. Then, unbolt the old module from its mounting bracket.
- Install the New Module: Bolt the new, pre-programmed TCM into place. Securely reconnect the electrical harnesses until they click.
- Final Steps: Reconnect the battery terminal. Start the vehicle and allow it to run for a few minutes. While the module is pre-programmed, it’s good practice to use a basic scan tool to clear any stored fault codes from the previous failure.
Guaranteed Compatibility
This module is a direct replacement for a wide range of GM vehicles and is interchangeable with numerous part numbers, ensuring you get the right component for the job. It is a reliable replacement for part numbers including: 24235753, 24252114, 24234503, 24230461, 24234274, 24235340, 24235754, 24238856, 24239224, 24240400, 24241806, 24256960, and YNXS.