Is your 2006-2009 Pontiac Montana struggling with harsh shifts, getting stuck in gear, or showing a check engine light? A failing Transmission Control Module (TCM) is often the culprit behind these frustrating and concerning issues. As the electronic brain of your automatic transmission, a faulty TCM can make your family minivan feel unreliable and unsafe. This replacement T42 TCM, part number 24252114, is the definitive solution, arriving pre-programmed to your vehicle’s specific VIN for a true plug-and-play fix.
Case Study: A Tricky Diagnosis
A customer brought in their ’07 Montana, explaining it would randomly refuse to shift past 2nd gear—a classic limp mode symptom. The check engine light was on, and my scan tool pulled a P0700 (Transmission Control System Malfunction) and a few solenoid circuit codes. While the codes pointed towards internal issues, my experience screamed electronics. In these GM vans, the TCM is exposed to heat and vibration at the strut tower. After a quick 20-minute swap with a VIN-programmed module, all the codes cleared, and the van shifted perfectly. It saved the customer from a costly and unnecessary transmission teardown.
Is Your Montana Exhibiting These Transmission Problems?
A failing TCM doesn’t get better on its own. If you’re noticing any of these signs, it’s time for a replacement. A new 2006-2009 Montana Transmission Module can restore your vehicle’s performance and your peace of mind.
- ✔ Harsh, slamming, or erratic gear changes.
- ✔ The vehicle is stuck in a single gear (limp mode), often 2nd or 3rd.
- ✔ Check Engine Light or Transmission Warning Light is illuminated.
- ✔ Diagnostic Trouble Codes (DTCs) are present, such as P0700, P0750, or other solenoid-related faults.
- ✔ Delayed engagement when shifting from Park to Drive or Reverse.
- ✔ Poor fuel economy and a feeling of sluggish performance.
- ✔ Complete loss of communication with the transmission.
Your 30-Minute Path to a Smooth Ride
You don’t need to be a professional mechanic to install this part. With basic hand tools, you can have your Montana back on the road in under half an hour. Our pre-programming means you can skip the expensive trip to the dealership.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts and to help reset the system.
- Locate the Module: On your 2006-2009 Pontiac Montana, the TCM is conveniently located on the driver’s side (LH) strut tower in the engine bay.
- Disconnect and Remove: Carefully unplug the electrical connectors. Then, unbolt the old module from its mounting bracket.
- Install the New Module: Bolt the new TCM into place and securely reconnect the electrical harnesses. Ensure they click into place.
- Final Steps: Reconnect the battery terminal. Start the vehicle and let it idle for a few minutes. If you have a basic scan tool, it’s good practice to clear any stored fault codes.
Verified Fitment for Your Vehicle
This T42 Transmission Control Module is a direct-fit replacement for your 2006-2009 Montana Transmission Module and is also compatible with a wide range of other General Motors vehicles. Please verify your part number or contact us for fitment confirmation.
Part Number Interchange: 24252114, 24242391, 24234503, 24230461, 24234274, 24235340, 24235754, 24238856, 24239224, 24239926, 24240400, 24241806, 24243901, 24243921, 24255280, 24256960, and more.
Select Compatible Models Include:
- Pontiac Montana (2006-2009)
- Chevrolet Uplander, Impala, Cobalt, HHR
- Buick Terraza, LaCrosse, Lucerne
- Saturn Vue, Aura, Ion
- And many other GM cars, trucks, and SUVs from 2006-2014.
Frequently Asked Questions
Do I need to get this module programmed by a dealer?
No. We pre-program the module to your vehicle’s VIN before shipping. This ensures it is ready for immediate installation right out of the box, with no additional programming or setup required.
What is the main benefit of replacing my TCM?
Replacing a faulty TCM restores crisp, correct shifting, eliminates limp mode, turns off related warning lights, and can improve fuel efficiency. It’s a critical repair for the health and longevity of your transmission.
Where exactly is the TCM on my Pontiac Montana?
For the 2006-2009 Pontiac Montana, the Transmission Control Module is mounted on the driver’s side (LH) strut tower in the engine compartment. It’s typically easy to access.
Is there a core charge for this part?
No, we do not require a core charge. You can keep your old part without the hassle of returning it, saving you time and money.