Fix Your Chevrolet Uplander’s Transmission Problems for Good
Is your 2006-2009 Chevrolet Uplander suffering from harsh shifting, getting stuck in gear, or showing a check engine light? As a technician with over two decades of experience, I’ve seen these symptoms countless times. Often, the root cause isn’t a costly internal transmission failure but a faulty Transmission Control Module (TCM). This VIN-programmed T42 TCM, part number 24235732, is the definitive, reliable solution to restore your vehicle’s performance and your peace of mind. It arrives ready to install, with no dealership visit required for programming.
A Technician’s Notebook: The Misleading Solenoid Code
A customer brought in a 2008 Uplander that was stuck in 3rd gear (limp mode) with a P0752 code for a stuck shift solenoid. They had already replaced the solenoid twice at another shop, but the problem kept returning within a week. After a quick data stream analysis, I noticed the TCM was commanding the solenoid erratically before dropping communication altogether. The issue wasn’t the solenoid; it was the brain telling it what to do. We installed a VIN-programmed 2006-2009 Uplander TCM, and the van has been shifting perfectly ever since. This part saved the customer from a potential transmission rebuild they didn’t need.
Is Your Uplander Showing These Transmission Warning Signs?
A failing TCM can mimic many other transmission issues. Before you consider a major repair, check if your vehicle is experiencing any of these common symptoms. Replacing the module is often the most direct and cost-effective fix.
- ✔ Harsh, jerky, or delayed gear shifts.
- ✔ Vehicle is stuck in one gear (often called “limp mode”).
- ✔ Check Engine Light or Transmission Warning Light is illuminated.
- ✔ Diagnostic Trouble Codes (DTCs) are present, especially P0700 (Transmission Control System Malfunction) or other solenoid-related codes (P0750, P0753, P0758).
- ✔ Failure to upshift or downshift properly.
- ✔ A sudden drop in fuel economy.
- ✔ Complete loss of communication with the TCM on a scan tool.
Your Step-by-Step Guide to a 30-Minute Installation
One of the best features of this module is its simple, DIY-friendly installation. For the 2006-2009 Chevrolet Uplander, the TCM is conveniently located, and you can complete the job with basic hand tools.
- 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 typically found mounted to the left-hand (driver’s side) strut tower in the engine bay. It’s a silver box with electrical connectors.
- Disconnect and Remove: Carefully unclip the wiring harness connectors. Then, unbolt the old module from its mounting bracket.
- Install the New TCM: Mount your new, pre-programmed 2006-2009 Uplander TCM in the same position and secure the bolts. Reconnect the wiring harnesses, ensuring they click securely into place.
- Final Steps: Reconnect the battery terminal. While the module is plug-and-play, it’s good practice to use a basic OBD2 scanner to clear any stored fault codes from the vehicle’s memory. Start the vehicle and enjoy smooth shifting!
Verified Fitment for Your General Motors Vehicle
This T42 TCM is a direct replacement for part number 24235732 and is interchangeable with a wide range of other GM service numbers. While this page focuses on the 2006-2009 Uplander TCM, it is also compatible with many other vehicles. Please verify your part number or consult the list below.
- Chevrolet Uplander: 2006, 2007, 2008, 2009 (Transmission; LH strut tower)
- Buick: Allure, LaCrosse, Lucerne, Rainier, Rendezvous, Terraza
- Cadillac: DTS
- Chevrolet: Avalanche, Cobalt, Colorado, Express, HHR, Impala, Malibu, Monte Carlo, Silverado, SSR, Suburban, Tahoe, Trailblazer
- GMC: Canyon, Envoy, Savana, Sierra, Yukon
- Hummer: H3
- Pontiac: G5, G6, Grand Prix, Pursuit
- Saab: 9-7X
- Saturn: Aura, Ion, Vue