Restore Peak Performance to Your Chevrolet Uplander’s Transmission
Are you experiencing frustrating and unpredictable shifting issues with your 2006-2009 Chevrolet Uplander? Symptoms like harsh gear changes, getting stuck in limp mode, or an illuminated check engine light can point directly to a failing Transmission Control Module (TCM). The TCM is the electronic brain of your automatic transmission, responsible for orchestrating every shift with precision. When it fails, drivability suffers, fuel economy plummets, and you risk further damage to your transmission’s mechanical components. This VIN-programmed T42 TCM, part number 24238856, is the definitive solution to restore your vehicle’s smooth, reliable operation.
From the Diagnostic Bay
We recently had a 2008 Uplander in the shop that was giving its owner headaches. The van would intermittently refuse to shift out of 2nd gear and was throwing a generic P0700 transmission fault code. The owner had already spent money at another shop replacing shift solenoids, but the problem persisted. After connecting our scan tool, we saw erratic data coming from the TCM. The commands being sent to the solenoids were inconsistent, proving the solenoids were never the issue. The root cause was the failing control unit. We installed one of our VIN-programmed T42 modules, cleared the codes, and the Uplander was shifting perfectly on the first test drive. It’s a classic case where targeting the ‘brain’ is the only way to solve the problem for good.
Common Symptoms of a Failing Uplander TCM
- ✔ Erratic Shifting: Experiencing sudden, harsh, or delayed gear engagement that makes driving uncomfortable and unpredictable.
- ✔ Stuck in Gear: The vehicle enters a ‘limp mode’ and will not shift past 2nd or 3rd gear, a safety measure to prevent further damage.
- ✔ Warning Lights: The Check Engine Light or a specific transmission warning light is illuminated on your dashboard.
- ✔ Diagnostic Trouble Codes (DTCs): You may find codes like P0700 (Transmission Control System Malfunction), P0750-P0758 (Shift Solenoid Faults), or other transmission-related errors.
- ✔ Poor Fuel Economy: Inefficient shifting and torque converter lockup caused by a faulty module can lead to a noticeable decrease in MPG.
- ✔ No Communication: In severe cases, a scan tool may be unable to communicate with the TCM, indicating a complete module failure.
The Superior Solution: A Programmed Uplander Transmission Module
Don’t settle for a generic, unprogrammed module that requires an expensive trip to the dealership for coding. Our T42 Uplander Transmission Module arrives at your door fully programmed to your vehicle’s specific Vehicle Identification Number (VIN). This critical step ensures that the module has the latest GM software and is perfectly calibrated for your Uplander’s engine, transmission, and tire size. This plug-and-play approach eliminates compatibility issues and allows for a straightforward installation, getting you back on the road faster and with less hassle.
Key Features & Benefits
- ✔ VIN Programmed for Your Van: We flash the module with the most current GM software for your specific vehicle, ensuring optimal shift points, torque converter strategy, and fuel efficiency.
- ✔ Plug-and-Play Installation: No dealership visit or specialized programming tools are required. Simply install the module, clear any old codes, and drive.
- ✔ OEM-Standard Quality: Built to meet or exceed original equipment specifications for durability and performance, ensuring a long-lasting repair.
- ✔ Solves Common DTCs: Directly addresses and resolves persistent transmission codes that solenoid or sensor replacements can’t fix.
- ✔ One-Year Warranty: Drive with confidence knowing your purchase is protected by a comprehensive one-year warranty.
- ✔ No Core Charge: Keep your old part without the hassle or expense of returning a core.
This module is a direct replacement for a wide range of GM part numbers, including 24252114, 24234503, 24230461, 24238856, and more, making it a versatile and reliable choice for many GM vehicles from 2006-2014 equipped with a 4-speed automatic transmission.
Installation Guide
For the 2006-2009 Chevrolet Uplander, the TCM is typically located on the driver’s side of the engine compartment, attached to the LH strut tower. The installation process is simple for a DIY mechanic or any professional technician. Always disconnect the negative battery terminal before beginning the replacement to reset the vehicle’s electrical systems and prevent any potential damage. After installing the new module and reconnecting the battery, use a standard OBD2 scan tool to clear any stored diagnostic trouble codes. The vehicle may need to go through a short drive cycle to complete its internal relearn process.
Frequently Asked Questions
Why is VIN programming necessary for this Uplander Transmission Module?
VIN programming loads your vehicle’s specific factory software onto the module. This ensures it communicates correctly with the Engine Control Module (ECM) and other vehicle systems, controlling shift points, line pressure, and torque converter lockup exactly as the manufacturer intended.
Do I need to take my van to a dealer after installation?
No. Because this module is pre-programmed to your VIN, no additional dealership programming or flashing is required. It is a true plug-and-play solution.
Where is the TCM located on my 2006-2009 Uplander?
On the Chevrolet Uplander and its platform mates (like the Pontiac Montana SV6), the TCM is typically found in the engine bay, mounted to the driver’s side (LH) strut tower.
Will this module fix transmission code P0700?
P0700 is a generic code indicating that the TCM has detected a fault and has requested the check engine light be turned on. While this module often resolves the underlying issue causing the P0700, it’s essential to scan for more specific codes (like P0751, P0756, etc.) to confirm the diagnosis.
Is there a core charge for my old part?
No, we do not require a core return. You can keep or dispose of your old module without any additional charges or hassle.