If your 2006-2009 Chevrolet Uplander is suffering from erratic shifting, getting stuck in gear, or has an illuminated check engine light, you’re likely dealing with a failing Transmission Control Module (TCM). As a family minivan, the Uplander’s reliability is paramount. Transmission problems can be more than just an annoyance; they can be a safety concern. This VIN-programmed T42 TCM, part number 24252114, is the definitive solution to restore your vehicle’s transmission performance and your peace of mind.
Over my 20 years in automotive diagnostics, I’ve seen countless GM vehicles, including minivans like the Uplander, come into the shop with these exact symptoms. The T42 module is the electronic brain of your automatic transmission, controlling everything from shift points to torque converter clutch engagement. When it fails, the symptoms can range from subtle hesitations to a complete loss of shifting. Our module arrives pre-programmed to your Uplander’s specific VIN, eliminating the need for expensive dealership visits and ensuring a seamless, plug-and-play repair.
A Technician’s Notebook
A customer brought in their ’08 Uplander with an intermittent but severe problem: it would occasionally slam into gear after coming to a stop and sometimes refuse to upshift on the highway. They had already replaced a shift solenoid with no improvement. A scan showed a generic P0700 code. From experience, I know these T42 modules can develop internal circuit faults that only appear when the module heats up. The driver for a specific solenoid can weaken, causing erratic behavior that mimics a bad solenoid. We installed one of our VIN-programmed TCMs, and the problem was solved instantly. It’s a classic case where the root cause is electronic, not mechanical.
Is Your Uplander Showing These Telltale Signs?
A faulty TCM can manifest in several ways. If you’re experiencing any of the following, it’s a strong indicator that your Uplander Transmission Control Module needs replacement:
- ✔ Harsh, delayed, or unpredictable gear shifts.
- ✔ Vehicle is stuck in “limp mode” (usually 2nd or 3rd gear) and won’t shift.
- ✔ Check Engine Light or Transmission Warning Light is on with codes like P0700, P0750, or other solenoid-related DTCs.
- ✔ A noticeable drop in fuel economy due to inefficient shifting.
- ✔ Complete failure to engage a gear from Park or Neutral.
DIY-Friendly Installation: Get Your Minivan Running Right
One of the best features of this module is its straightforward installation. You don’t need to be a professional mechanic to get this job done. For the Chevrolet Uplander, the TCM is conveniently located and accessible.
- Safety First: Before you begin, disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts and to help reset the system.
- Locate the Module: On the 2006-2009 Uplander, the TCM is typically found at the driver’s side (LH) strut tower in the engine bay. It’s a silver box with electrical connectors.
- Disconnect and Remove: Carefully unplug the electrical harnesses. Then, unbolt the old module from its mounting bracket.
- Install the New TCM: Mount the new module in the same location and securely reconnect the harnesses. Ensure they click into place.
- Final Steps: Reconnect the battery terminal. While the module is pre-programmed, it’s good practice to use a basic OBD2 scanner to clear any stored trouble codes from the system’s memory.
Verified Vehicle Compatibility
This T42 Transmission Control Module is a direct replacement for part number 24252114 and is guaranteed to fit the following models. It is also interchangeable with a wide range of other GM part numbers (see features list).
- Chevrolet Uplander: 2006, 2007, 2008, 2009 (Transmission; LH strut tower)
- Chevrolet Impala: 2006-2011 (Transmission; lower air cleaner housing)
- Chevrolet HHR: 2006-2011 (Transmission; LH engine compartment)
- Pontiac G6: 2006-2010 (Transmission; LH strut tower)
- Buick LaCrosse / Allure: 2006-2009 (Transmission; lower air cleaner housing)
- Saturn Vue: 2007-2010 (Transmission; 2.4L, LH front engine compartment)
- …and many other GM vehicles from 2006-2014. Please verify your part number.
Frequently Asked Questions
Do I need to take my van to the dealer for programming?
No. This is the biggest benefit. We program the module to your vehicle’s VIN before shipping. It arrives ready for installation, saving you time and the high cost of dealership programming.
Is this a reliable, long-term fix for my Uplander Transmission Control Module?
Absolutely. These modules are built to meet or exceed OEM specifications and address common failure points of the original T42 units. It’s a dependable solution backed by a one-year warranty.
What tools do I need for installation?
Installation typically requires only basic hand tools, such as a socket set to remove the mounting bolts and a wrench for the battery terminal. No special electronic equipment is needed.
Is there a core charge for my old part?
No, there is no core charge. You can keep your old part without any hassle or need to ship it back, simplifying the repair process for you.