End Frustrating Shifting Problems in Your Chevy Uplander
If you’re dealing with a 2006-2009 Chevrolet Uplander that slams into gear, refuses to shift, or has its check engine light glaring at you, the problem is very likely a faulty Transmission Control Module (TCM). As a technician with over two decades of experience, I’ve seen hundreds of these T42 modules fail. The constant heat cycles and vibrations under the hood eventually lead to internal circuit board failures, causing a host of transmission headaches that can make your family minivan feel unreliable and unsafe.
This isn’t just another part; it’s a permanent fix. We offer a dependable, OEM-quality 2006-2009 Uplander TCM that arrives at your doorstep fully programmed to your vehicle’s specific VIN. This means you can skip the expensive trip to the dealership for programming. It’s a true plug-and-play solution designed to restore the smooth, predictable performance your vehicle had when it was new. It directly manages shift solenoid commands, line pressure, and torque converter clutch engagement, ensuring your transmission operates exactly as the manufacturer intended.
Case Study: The Uplander That Dodged a Transmission Rebuild
A customer brought in their 2008 Uplander with classic symptoms: it was stuck in 3rd gear (limp mode) and had a P0700 code. Another shop had quoted them over $2,500 for a transmission rebuild, assuming the worst. After a quick scan, I suspected the TCM. We swapped in one of our pre-programmed modules, and in less than 30 minutes, the van was shifting perfectly. The customer saved thousands of dollars and a lot of stress by correctly diagnosing the electronic failure instead of condemning the mechanical hardware. This is a common story for these vehicles.
Is Your Uplander Showing These Transmission Problems?
- ✔ Harsh, clunky, or delayed gear shifts.
- ✔ The vehicle is stuck in a single gear (often called “limp mode”).
- ✔ Check Engine Light or Transmission Warning Light is on with codes like P0700, P0750, or other solenoid-related faults.
- ✔ Inability to upshift or downshift properly, leading to poor acceleration.
- ✔ A noticeable drop in fuel economy or signs of the transmission overheating.
- ✔ Complete loss of communication with the transmission module.
DIY-Friendly Installation Guide: Get Your Van Back on the Road
- ✔ Safety First: Before you begin, disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts.
- ✔ Locate the Module: On the 2006-2009 Uplander, the TCM is conveniently located at the driver’s side (LH) strut tower in the engine bay. It’s a small silver box with electrical connectors.
- ✔ Swap the Part: Carefully unplug the wiring harnesses from the old TCM. Unbolt the module from its bracket. Mount the new module in its place and securely reconnect the wiring harnesses.
- ✔ Final Steps: Reconnect the negative battery terminal. Start the vehicle to ensure it shifts correctly. While the battery disconnect often clears codes, it’s best practice to use a basic OBD2 scanner to clear any stored Diagnostic Trouble Codes (DTCs).
Verified Vehicle Compatibility
This module is a guaranteed direct-fit replacement for the following vehicle:
- Chevrolet Uplander: 2006, 2007, 2008, 2009 (Transmission Control Module located at LH strut tower)
This part, also known as service number 24235340, is interchangeable with a wide range of GM part numbers and fits many other vehicles like the Pontiac Montana, Buick Terraza, and Saturn Relay. Our VIN programming ensures it works perfectly for your specific application.
Frequently Asked Questions
Do I need to program this module?
No. This is the biggest benefit of our service. We program the module to your vehicle’s VIN before shipping, so it’s ready for installation right out of the box. You will not need to visit a dealer.
Where is the TCM on my 2007 Uplander?
The Transmission Control Module on the 2006-2009 Chevy Uplander is mounted on the driver’s side (left-hand) strut tower in the engine compartment.
Will this fix a P0700 trouble code?
A P0700 code is a general fault request from the TCM to the main engine computer (ECM) to turn on the check engine light. In many cases, a failing TCM is the root cause, and replacing it will resolve the P0700 and any related transmission-specific codes.
What tools are required for installation?
Installation is very straightforward. You will typically only need basic hand tools, such as a socket set and a wrench, to disconnect the battery and unbolt the module from its bracket.
Is there a core charge?
No, we do not require a core charge. You can keep your old part, so there’s no need to worry about return shipping or waiting for a refund.