If your 2006-2009 Chevrolet Uplander is suffering from unpredictable shifting, getting stuck in gear, or has an illuminated check engine light, you’re likely dealing with a faulty Transmission Control Module (TCM). As the electronic brain of your automatic transmission, a failing TCM can make your family minivan feel unreliable and unsafe. This T42 TCM, corresponding to part number 24240400, is the definitive solution, arriving pre-programmed to your vehicle’s specific VIN for a true plug-and-play repair.
Over my 20 years in diagnostics, I’ve seen countless vehicle owners worry about expensive transmission work when the real culprit was this module. This part restores the precise electronic control over gear changes and torque converter lockup, eliminating the frustrating symptoms and getting your Uplander back to the smooth, dependable vehicle it should be.
Case Study: The Uplander That Dodged a Rebuild
A customer brought in their ’08 Uplander with classic signs of transmission failure: harsh 1-2 shifts and occasionally getting stuck in 3rd gear (limp mode). Another shop had quoted them over $2,500 for a transmission rebuild. I pulled the codes and saw a P0700 (Transmission Control System Malfunction) and a P0752 (Shift Solenoid ‘A’ Stuck On). Instead of jumping to the worst-case scenario, I checked the TCM. Sure enough, the module was failing intermittently. We installed a VIN-programmed T42 module, and the van shifted perfectly. This simple, under-an-hour fix saved the customer thousands and restored their confidence in their vehicle.
Is Your Uplander Showing These Transmission Issues?
- ✔ Abrupt, harsh, or delayed gear shifts that make driving uncomfortable.
- ✔ The vehicle enters “limp mode,” refusing to shift out of a single gear.
- ✔ Check Engine Light or Transmission Warning Light is on, with Diagnostic Trouble Codes (DTCs) like P0700, P0750, or other solenoid-related faults.
- ✔ A noticeable drop in fuel economy due to inefficient shifting.
- ✔ Complete loss of gear engagement or failure to upshift/downshift.
The Direct-Fit Solution for a Lasting Repair
Don’t settle for a temporary fix or pay for unnecessary dealership programming. This module is programmed using the latest GM software updates matched directly to your van’s VIN. This ensures all shift points, pressure controls, and diagnostic parameters are perfectly calibrated right out of the box. This is the most critical step for a successful repair of a 2006-2009 Uplander TCM, and we handle it for you.
DIY Installation Guide: A 30-Minute Fix
- ✔ Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent electrical shorts and help reset the system.
- ✔ Locate the Module: On the 2006-2009 Uplander, the TCM is conveniently located on the LH (driver’s side) strut tower in the engine compartment.
- ✔ Disconnect and Remove: Carefully unplug the electrical connectors from the old TCM. Then, unbolt the module from its mounting bracket.
- ✔ Install the New Module: Bolt the new, pre-programmed 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. While not always required, using a basic OBD2 scan tool to clear any stored transmission codes is a best practice.
Verified Vehicle Compatibility
This T42 Transmission Control Module is a direct replacement for part number 24240400 and other service numbers. While it is guaranteed to fit the 2006-2009 Uplander TCM application, it is also compatible with a wide range of other GM vehicles, including:
- Chevrolet Uplander (2006-2009) – LH strut tower
- Chevrolet Impala / Monte Carlo (2006-2011) – Lower air cleaner housing
- Chevrolet Cobalt / HHR (2006-2011) – LH strut tower / engine compartment
- Pontiac G6 / Grand Prix (2006-2010) – LH strut tower / lower air cleaner housing
- Buick LaCrosse / Allure (2006-2009) – Lower air cleaner housing
- Saturn Vue / Aura (2007-2010) – LH front engine compartment / frame rail
- …and many other GM models. Please verify your part number or contact us with your VIN.
Frequently Asked Questions
Do I need to take my van to the dealer for programming after installation?
No. This module comes fully programmed to your vehicle’s VIN. It is a plug-and-play installation, saving you time and money on dealership service fees.
Is this a difficult part for a DIY mechanic to replace?
Not at all. For the Uplander, the TCM is easily accessible in the engine bay. With basic hand tools, the replacement typically takes less than 30 minutes.
What if I replace the TCM and still have shifting problems?
While this module resolves the most common cause of these symptoms, persistent issues could indicate a mechanical problem within the transmission, such as a faulty solenoid or wiring harness damage. A professional diagnosis would be the next step.
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.
How do I provide my VIN for programming?
You will be prompted to enter your 17-digit VIN during the checkout process. Please double-check it for accuracy to ensure perfect programming.