Restore Smooth, Reliable Shifting to Your 2006-2009 Chevrolet Uplander
As a technician with over two decades of experience under the hood, I’ve seen firsthand how a failing Transmission Control Module (TCM) can turn a dependable family vehicle like the Chevy Uplander into a source of daily frustration. The sudden jerks, delayed shifts, and the dreaded check engine light can be stressful. You’re not just dealing with a faulty part; you’re dealing with a vehicle you rely on. That’s why we offer this high-quality, VIN-programmed T42 Transmission Control Module, part number 24243901, as a direct-fit solution to get your minivan running right again.
The TCM is the electronic brain of your automatic transmission. It processes data from various sensors to control shift points, torque converter lockup, and line pressure. When it fails, communication breaks down, leading to the erratic behavior you’re likely experiencing. This isn’t just an inconvenience—it affects fuel economy, transmission longevity, and overall vehicle safety. Our module is meticulously prepared with your vehicle’s specific VIN, ensuring it works seamlessly with your Uplander Transmission Control Module system right out of the box, eliminating the need for expensive dealership programming.
From the Diagnostic Bay: The Case of the Hesitant Minivan
A customer brought in their ’08 Uplander complaining of a severe hesitation when accelerating from a stop and harsh, unpredictable shifts between 2nd and 3rd gear. They also had a persistent P0700 (Transmission Control System Malfunction) code. After confirming the fluid was clean and at the correct level, my diagnostic scan pointed to an internal TCM fault. These modules, often located on the LH strut tower on the Uplander, are susceptible to heat and vibration over time, causing internal circuits to fail. We installed one of our VIN-programmed TCMs, cleared the codes, and the van drove like new. The customer saved hundreds compared to a dealership visit and drove away with confidence.
Is Your Uplander Showing These Telltale Signs?
A failing TCM often gives clear warnings. If you’re noticing any of the following, it’s a strong indicator that your Uplander Transmission Control Module needs replacement:
- ✔ Harsh, slamming shifts or erratic gear changes.
- ✔ The vehicle feels stuck in one gear (often called “limp mode”).
- ✔ Check Engine Light or Transmission Warning Light is on with codes like P0700, P0750, or other solenoid-related DTCs.
- ✔ Delayed engagement when shifting from Park to Drive or Reverse.
- ✔ A noticeable drop in fuel efficiency.
- ✔ Complete failure to shift up or down.
A Straightforward Guide to Installation
This is a repair many DIYers can handle in their own driveway in under an hour. For the 2006-2009 Uplander, the TCM is typically found on the driver’s side strut tower. Follow these steps for a successful installation:
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work. This prevents short circuits and helps reset the vehicle’s computer systems.
- Locate the Module: On your Uplander, find the TCM mounted to the LH (driver’s side) 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 module from its mounting bracket. Keep the hardware in a safe place.
- Install the New TCM: Mount the new, pre-programmed module in place using the original hardware. Securely plug in the electrical connectors until they click.
- Final Steps: Reconnect the battery terminal. While the module is plug-and-play, it’s always best practice to use a basic OBD2 scan tool to clear any stored fault codes from the vehicle’s memory. Start the vehicle and take it for a test drive to confirm smooth shifting.
Verified Fitment for Your GM Vehicle
While this is a perfect solution for the 2006-2009 Uplander, this T42 TCM is also compatible with a wide range of other GM vehicles. Please verify your model and location notes below. This module is a direct replacement for part numbers including 24243901, 24252114, 24234503, and others.
This part fits these models with these options:
… UPLANDER 06-09 Transmission; (LH strut tower) … and many other GM cars, trucks, and SUVs as listed in the compatibility chart.
Frequently Asked Questions
Frequently Asked Questions
Do I need to take my vehicle to a dealership for programming?
No. This Transmission Control Module is delivered pre-programmed to your vehicle’s specific VIN. It is ready for installation right out of the box, saving you time and money.
What is the main function of the Uplander Transmission Control Module?
The TCM acts as the computer for your automatic transmission, controlling when the vehicle shifts gears, how firmly it shifts, and managing the torque converter. A working TCM is essential for performance, fuel economy, and transmission health.
Is there a core charge for my old part?
No, there is no core charge required for this part. You can keep your old module without any hassle or need to return it.
What kind of warranty comes with this module?
This part is backed by our one-year warranty, giving you peace of mind and confidence in your repair.
Will this fix a P0700 trouble code?
A P0700 code is a general fault code indicating the TCM has detected a problem. In many cases where the TCM itself is the source of the failure, replacing it with our programmed module will resolve the issue and allow the code to be cleared.