Restore Smooth, Reliable Shifting to Your Chevrolet Uplander
If your 2006-2009 Chevrolet Uplander is suffering from erratic shifting, getting stuck in gear, or throwing transmission-related check engine lights, a failing Transmission Control Module (TCM) is the most likely cause. As a technician with over two decades of experience, I’ve seen firsthand how a faulty TCM can make a reliable family minivan feel unsafe and unpredictable. This isn’t just an inconvenience; it’s a critical failure that impacts drivability and fuel economy. This direct-replacement T42 TCM, part number 24255280, is the definitive solution, arriving pre-programmed to your vehicle’s specific VIN for a true plug-and-play repair.
Is Your Uplander Showing These Telltale Signs?
A failing TCM doesn’t always mean a complete transmission failure. Often, the symptoms are electronic in nature and can be resolved by replacing this single component. Watch for these common indicators:
- ✔ Harsh, banging shifts or delayed gear engagement.
- ✔ The vehicle feels stuck in one gear (often called “limp mode”).
- ✔ The check engine light is on with codes like P0700 (Transmission Control System Malfunction) or various solenoid-specific codes (P0750-P0758).
- ✔ A sudden drop in fuel efficiency.
- ✔ The transmission seems to slip out of gear or fails to downshift when slowing down.
- ✔ Complete loss of communication with the module, preventing diagnostics.
From the Diagnostic Bay: The Misleading Solenoid Code
I remember a 2008 Uplander that came into the shop with a P0752 code, indicating a “Shift Solenoid A Stuck On” condition. The owner had already replaced the solenoid inside the transmission pan—a messy, time-consuming job—but the problem persisted. After a quick data scan, I saw the TCM was commanding the solenoid on, but the feedback voltage was erratic. The root cause wasn’t the solenoid at all; it was a failing driver circuit inside the TCM. We installed a VIN-programmed module, cleared the codes, and the van shifted perfectly. This saved the customer from a costly and unnecessary transmission teardown.
The Power of VIN Programming: A True Plug-and-Play Fix
The biggest hurdle with replacing modern electronics is the need for expensive dealership programming. We eliminate that step entirely. By providing us with your vehicle’s VIN during checkout, we flash the module with the latest GM-certified software specific to your 2006-2009 Uplander TCM. This ensures all shift points, torque converter lockup strategies, and communication protocols are perfectly matched to your vehicle’s factory settings. The result is a seamless installation that restores performance right out of the box, with no extra tools or trips to the dealer required.
DIY Installation: A Simple 30-Minute Fix
Replacing the 2006-2009 Uplander TCM is a straightforward job that most DIYers can handle with basic tools. In the Uplander and its platform-mates (Montana, Terraza, Rendezvous), the module is typically easy to access.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts and help reset the system.
- Locate the Module: On the Uplander, the TCM is usually mounted on or near the driver’s side strut tower, sometimes under the air cleaner housing. It’s a silver box with two large electrical connectors.
- Disconnect and Remove: Carefully unclip the two wiring harness connectors. Then, remove the bolts or nuts holding the module to its bracket.
- Install the New Module: Bolt the new, pre-programmed TCM into place. Reconnect the two wiring harnesses, ensuring they click securely into position.
- Final Steps: Reconnect the battery terminal. Start the vehicle and let it idle for a few minutes. If you have a basic OBD2 scanner, it’s good practice to clear any stored fault codes. Take the vehicle for a test drive to confirm smooth shifting.
Verified Fitment for Your General Motors Vehicle
While this page is focused on the Uplander, this T42 TCM (interchangeable with part numbers 24242391, 24234503, 24252114, 24255280, and more) is compatible with a wide range of GM vehicles. Please verify your part number or use our vehicle selector for guaranteed fitment.
- Chevrolet: Uplander (06-09), Cobalt (06-10), HHR (06-11), Impala (06-11), Monte Carlo (06-07), Malibu (06-10), Silverado, Tahoe, Express Van
- Pontiac: Montana (06-09), G6 (06-10), Grand Prix (06-08), G5 (07-10)
- Buick: Terraza (06-07), Rendezvous (06-07), LaCrosse (06-09), Lucerne (06-11)
- Saturn: Relay (06-07), Vue (07-10), Aura (07-09), Ion (06-07)
- …and many other GM models from 2006-2014.
Do I need to send my old TCM back? (Core Charge)
Do I need to send my old TCM back? (Core Charge)
No, there is absolutely no core charge or need to return your old part. You can keep it, recycle it, or dispose of it at your convenience.
What happens if I don’t provide a VIN?
Providing your VIN is critical. Without it, we cannot program the module to match your vehicle’s specific configuration. This can result in shifting problems, warning lights, or the vehicle not starting. Please double-check your VIN for accuracy before ordering.
Is this a difficult part to install myself?
Not at all. For most DIY enthusiasts with basic hand tools, this is a very manageable job that takes less than 30 minutes. The location on the Uplander (LH strut tower) is generally easy to access.
Will this fix a P0700 trouble code?
A P0700 code is a generic fault request from the TCM to the main engine computer (ECM) to turn on the check engine light. A failing TCM is a very common cause of this code. While not a guarantee for every situation, replacing a faulty TCM often resolves the P0700 code and any related specific transmission codes.
What is the warranty on this 2006-2009 Uplander TCM?
This module is backed by our one-year, hassle-free warranty, giving you peace of mind and confidence in your repair.