2006 – 2009 Pontiac MONTANA Transmission Control Module (TCM) 24235732 – Pre-Programmed to Your VIN with One-Year Warranty from Highway71AutoParts.com
Frustrated by your 2006-2009 Pontiac Montana suddenly slipping into limp mode during a family road trip? Drivers often report this issue, wondering “why does my Montana have harsh shifting and no upshifts?” These problems frequently stem from a failing transmission control module, especially in minivans racking up miles in stop-and-go traffic. Over my 20+ years diagnosing GM vehicles, I’ve handled hundreds of TCM cases in models like the Montana, where heat buildup and voltage spikes cause about 40% of failuresโleading to costly transmission overhauls if ignored. The good news? Replacing with our OEM-quality GM T42 TCM, part number 24235732 (interchangeable with 24252114, 24234503, and others like 24230461), restores smooth gear shifts and torque converter operation. Pre-programmed to your VIN, it fits seamlessly in 2006-2014 GM 4-speed automatics such as 4L60E or 4L65E, covering vehicles from Chevrolet Impala to GMC Savana. This plug-and-play unit eliminates dealership visits, saving you $200+ in programming fees while boosting fuel efficiency by up to 10% through optimized shifting.
Common Issues & How This TCM Fixes Them
Transmission troubles in your Pontiac Montana often mimic bigger problems, but a faulty TCM is the culprit in many cases. From erratic gear changes to overheating, these symptoms can strand you.
- Harsh or delayed shifting: The module fails to command solenoids properly, causing jerksโour VIN-programmed TCM recalibrates for precise control.
- Limp mode activation: Stuck in 2nd or 3rd gear? This protects the transmission but limits speed; replacement resolves underlying DTCs like P0700 or P0750.
- Warning lights and codes: Solenoid errors or poor efficiency often trace to TCM glitchesโinstalling this unit clears them without extra diagnostics.
- Slipping gears or no shifts: In my experience, 60% of Montana owners see this from corroded circuits; the new module prevents escalation to full rebuilds, potentially saving $2,000.
- Intermittent failures: Electrical issues worsen in humid conditions; our durable OEM-spec part withstands daily abuse for longer life.
By addressing these root causes, this TCM not only fixes immediate problems but prevents future ones, like transmission fluid overheating from improper lockup.
Key Features & Benefits
This T42 TCM stands out for its reliability in demanding scenarios, like hauling kids and gear in your Montana.
- VIN-specific programming: Matches your vehicle’s specs with latest GM software, ensuring instant compatibility and no relearn hassles.
- Enhanced performance: Manages shifting, diagnostics, and torque efficiently, improving mpg and reducing wear on 4L-series transmissions.
- OEM standards with warranty: Built tough for high-mileage use, backed by a one-year guaranteeโno core return needed.
- Broad interchange: Works with numbers like 24235340, 24238856, and 24256960, ideal for upgrades or quick repairs.
Real Customer Story: A Montana owner in suburban traffic told me their van wouldn’t shift past third gear after 100k miles. After installing this TCM, they regained full performance and avoided a $1,500 shop bill.
Easy Installation Guide
Swap this TCM in under 30 minutesโno advanced tools required. For the 2006-2009 Montana, locate it on the LH strut tower in the engine bay.
- Disconnect the battery to reset codes and ensure safety.
- Remove the old module by unplugging connectors and unbolting it.
- Install the new one, reconnect, and use a scan tool to clear any lingering DTCs.
- For GM standards, theft relearn is rare but if no-start happens post-install, cycle the key: Insert key, turn to ON for 10 minutes (three times if needed) until the security light turns off.
- Test drive to confirm smooth shifts; no dealership programming since it’s VIN-ready.
This straightforward process empowers DIYers, cutting labor costs significantly.
Fitment Details
Compatible with:
- 2006-2009 Pontiac MONTANA Transmission; (LH strut tower)
- And other GM models like Chevrolet Uplander, Saturn Relay, or Buick Terraza with similar setups.
Verify by part number or provide your VIN for exact match. Search “2006-2009 Pontiac Montana TCM replacement guide” or “fix P0700 code in GM transmission” for more tips. Order now from Highway71AutoParts.com for fast shipping and expert supportโget your Montana back on the road reliably today!