Is your 2006-2009 Pontiac Montana struggling with harsh shifts, getting stuck in gear, or throwing transmission codes? A failing Transmission Control Module (TCM) is often the culprit behind these frustrating and unpredictable issues. As the electronic brain of your automatic transmission, the TCM dictates every gear change and torque converter operation. When it fails, drivability suffers. This is the direct, reliable solution to restore your minivan’s performance and peace of mind.
This T42-style TCM, part number 24241806, is the definitive fix for your vehicle. 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 ready for a true plug-and-play installation, with no need for an expensive trip to the dealership for programming. It’s designed to resolve the root cause of common transmission-related Diagnostic Trouble Codes (DTCs) and restore the smooth, efficient operation you expect from your Montana.
Case Study: A Tricky Diagnosis
A customer brought in a 2008 Pontiac Montana with a complaint that stumped a couple of other shops. The van would drive perfectly for 20 minutes, then suddenly slam into gear and get stuck in 3rd (limp mode), flashing a Check Engine light for P0700. After it cooled down, it would be fine again. This intermittent thermal failure is a classic sign of a failing TCM. The internal circuit boards develop micro-fractures that only open up when hot. We installed one of our VIN-programmed modules, and the problem was solved permanently. The customer saved hundreds compared to a dealership visit and got their family vehicle back on the road safely.
Is Your Montana Exhibiting These Transmission Problems?
A faulty TCM can manifest in several ways. If you’re experiencing any of the following, this module is the likely solution for your 2006-2009 Montana TCM issues:
- ✔ Harsh, banging, or erratic gear shifts.
- ✔ The vehicle is stuck in a single gear (often called ‘limp mode’).
- ✔ Delayed engagement when shifting from Park to Drive or Reverse.
- ✔ Check Engine Light or Transmission Warning Light is on with codes like P0700, P0750, or other solenoid-related faults.
- ✔ Complete loss of communication with the transmission module.
- ✔ Poor fuel economy and a feeling of sluggish performance.
A Straightforward Guide to Installation
One of the best features of this part is its simple installation, which a DIYer can typically complete in under 30 minutes with basic hand tools. For the Pontiac Montana, the TCM is conveniently located and easy to access.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts and help reset the system.
- Locate the Module: On the 2006-2009 Pontiac Montana, the TCM is found bolted to the driver’s side strut tower in the engine compartment.
- Disconnect and Remove: Carefully unplug the electrical connectors. Use a socket wrench to remove the bolts holding the old module in place.
- Install the New TCM: Mount the new, pre-programmed module in the same location and securely fasten the bolts. Re-connect the electrical harnesses.
- Final Steps: Reconnect the battery terminal. While the module is plug-and-play, it’s always good practice to use a basic OBD2 scanner to clear any stored fault codes from the vehicle’s memory.
Verified Vehicle Compatibility
This module is a direct fit for the specified models. While this page focuses on the 2006-2009 Montana TCM, this versatile T42 module also fits a wide range of other GM vehicles, ensuring OEM-level function across the board. Key compatible models include:
- ✔ Pontiac Montana: 2006-2009 (LH strut tower)
- ✔ Chevrolet Uplander: 2006-2009 (LH strut tower)
- ✔ Buick Terraza: 2006-2007 (LH strut tower)
- ✔ Chevrolet Impala: 2006-2011 (lower air cleaner housing)
- ✔ Pontiac G6: 2006-2010 (LH strut tower)
- ✔ Chevrolet Cobalt: 2006-2010 (LH strut tower)
- ✔ Chevrolet HHR: 2006-2011 (LH engine compartment)
- ✔ And many more GM cars, trucks, and SUVs.
This part is interchangeable with service numbers including 24242391, 24234503, 24252114, 24230461, and more.
Frequently Asked Questions
Does this TCM require any additional programming?
No. We program the module to your vehicle’s VIN before shipping. It arrives ready for installation, saving you a trip to the dealer.
Is this a difficult part to install myself?
Not at all. For the Pontiac Montana, it’s located on the driver’s side strut tower and is easily accessible. Most DIYers can complete the swap in under 30 minutes with basic tools.
Will this fix a P0700 trouble code?
A P0700 code is a generic fault request from the TCM to the main engine computer. In most cases where the TCM itself has failed, replacing it with this module will resolve the root cause of the P0700 and related specific transmission codes.
Do I need to send my old part back?
No, there is no core charge for this part. You can keep or dispose of your old module without any hassle.
What kind of warranty is included?
This module is backed by our one-year, hassle-free warranty, giving you confidence in the quality and reliability of your repair.