If your 2006-2009 Chevrolet Uplander is suffering from frustrating and unpredictable transmission problems, you’re not alone. As a technician with over two decades of experience, I’ve seen countless minivans come into the shop with symptoms like harsh shifting, getting stuck in gear, or a lit-up check engine light that points to the transmission. The culprit is often a failing Transmission Control Module (TCM), the electronic brain that manages every aspect of your automatic transmission’s performance. A faulty TCM can make your family vehicle feel unreliable and unsafe.
This T42 Transmission Control Module, part number 24241806, is the definitive solution. It arrives at your door expertly programmed to your Uplander’s specific Vehicle Identification Number (VIN). This critical step ensures it communicates flawlessly with your vehicle’s other computers right out of the box, eliminating the need for an expensive trip to the dealership for programming. Restore the smooth, predictable performance your vehicle was built to deliver.
From the Diagnostic Bay
I remember a 2008 Uplander that came in with an intermittent but severe issue. The owner, a father of three, said it would randomly slam into gear, especially after driving for 20 minutes. On other days, it would get stuck in 3rd gear (limp mode), which was a major safety concern for him. His scanner showed a generic P0700 code. After checking the basics—fluid level and condition—we connected our professional scan tool. Live data showed erratic commands being sent to the shift solenoids. We swapped in a pre-programmed T42 TCM, and the problem vanished instantly. It’s a classic failure mode for these modules, where internal electronics break down from heat and vibration over time.
Is Your Uplander Showing These Symptoms?
- ✔️ Harsh, delayed, or erratic gear shifts that make driving uncomfortable.
- ✔️ The vehicle is stuck in a single gear (often called “limp mode”) and won’t shift up or down.
- ✔️ Check Engine Light or Transmission Warning Light is illuminated on your dash.
- ✔️ Diagnostic Trouble Codes (DTCs) are present, such as P0700 (Transmission Control System Malfunction) or various shift solenoid codes (e.g., P0750, P0751).
- ✔️ A noticeable drop in fuel economy or the transmission seems to be overheating.
- ✔️ Complete loss of communication with the TCM, leading to a no-start or no-shift condition.
Your Guide to a Straightforward Installation
Replacing the Uplander Transmission Control Module is a job most DIYers can handle in their own driveway in under 30 minutes. The module is conveniently located for easy access.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electronic component replacement. This prevents electrical shorts and helps reset the vehicle’s systems.
- Locate the Module: On the Chevrolet Uplander and similar vans (Montana, Terraza), the TCM is typically found mounted to the driver’s side strut tower in the engine bay.
- Disconnect and Remove: Carefully unplug the electrical connectors. They have locking tabs that need to be depressed. Once disconnected, unbolt the module from its mounting bracket.
- Install the New TCM: Bolt the new, VIN-programmed module into place and securely reconnect the electrical harnesses. Ensure they click into place.
- Final Steps: Reconnect the battery terminal. While our programming handles the critical setup, it’s good practice to use a basic OBD2 scanner to clear any lingering fault codes from the ECU. Start the vehicle and enjoy restored shifting performance.
Verified Fitment For Your Vehicle
This T42 TCM is a direct-fit replacement for the following vehicles, specifically programmed for your 2006-2009 Chevrolet Uplander. It also serves as a compatible replacement for a wide range of other GM vehicles. Please verify your part number (24241806) or contact us with your VIN to confirm compatibility.
- ✔️ Chevrolet Uplander: 2006, 2007, 2008, 2009 (Transmission; LH strut tower)
- ✔️ Also fits many other GM models including the Impala, Monte Carlo, Cobalt, HHR, Pontiac G6, Saturn Vue, and more. This part is interchangeable with service numbers 24242391, 24234503, 24252114, and others.
Frequently Asked Questions
What does “VIN Programmed” mean for me?
It means we flash the module with your vehicle’s specific VIN and the latest GM software before we ship it. This makes the installation plug-and-play. You won’t need to pay a dealership for expensive programming, saving you time and hundreds of dollars.
Is this a difficult part to install myself?
Not at all. For a Chevy Uplander, the TCM is located on the driver’s side strut tower in the engine bay. With basic hand tools, most people can swap it out in under 30 minutes. Our step-by-step guide above walks you through the process.
Will this fix my P0700 trouble code?
A P0700 code is a general fault code indicating the TCM has detected a problem. In many cases, a failing TCM is the root cause. Replacing the module with our pre-programmed unit is a very common and effective fix for this and related solenoid codes.
Do I need to send my old part back?
No, there is no core charge for this part. You can keep your old module or dispose of it, making the process hassle-free.
What kind of warranty is included?
This module is backed by our solid one-year warranty, giving you peace of mind and confidence in your repair.