Restore Peak Performance to Your Workhorse Van
If your 2006-2014 Chevrolet Express 2500 Van is suffering from harsh shifting, getting stuck in gear, or throwing transmission codes, a failing Transmission Control Module (TCM) is the likely culprit. As the brain of your automatic transmission, a faulty T42 module can bring your work to a grinding halt. This replacement TCM, part number 24235732, is the definitive solution. It arrives expertly programmed to your van’s specific VIN, eliminating the need for expensive dealership visits and ensuring a seamless, plug-and-play installation that gets you back on the road and back to business.
From the Diagnostic Bay: The Case of the Limping Work Van
A local contractor brought in his 2011 Express 2500, a critical vehicle for his business. The complaint was simple: the van was stuck in what felt like third gear (limp mode) and the check engine light was on. His business was losing money every hour the van was down. My scan tool immediately pulled a P0700 (Transmission Control System Malfunction) and several solenoid-specific codes. After 20 years in the business, I’ve learned that when you see a cluster of transmission codes like that, the issue often isn’t the individual solenoids but the module commanding them. We confirmed power and ground to the TCM were good, pointing directly to an internal failure. Instead of a costly and time-consuming trip to the dealer, we ordered this VIN-programmed T42 module. It arrived ready to install, and within an hour, the van was shifting perfectly, all codes were cleared, and the contractor was back on his way to a job site. It’s a reliable fix that prevents downtime.
Is Your Express Van Showing These Red Flags?
- ✔ Harsh, erratic, or delayed gear shifts that make driving unpredictable.
- ✔ The vehicle is stuck in “limp mode,” usually second or third gear, with no ability to upshift or downshift.
- ✔ Check Engine Light or Transmission Warning Light is illuminated on the dash.
- ✔ Diagnostic Trouble Codes (DTCs) are present, such as P0700, P0750, or other transmission solenoid-related faults.
- ✔ A noticeable drop in fuel economy due to inefficient shifting.
- ✔ Complete loss of communication with the transmission module, leading to a no-start or no-shift condition.
A Straightforward Installation Guide for Your Express Van
Getting your van back in top shape is easier than you think. This installation can typically be completed in under 30 minutes with basic hand tools.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work. This prevents short circuits and helps reset the vehicle’s electronic systems.
- Locate the TCM: On the Chevrolet Express and GMC Savana vans, the TCM is conveniently located in the engine compartment on the right-hand (passenger) side. It’s typically mounted near the firewall or inner fender.
- Disconnect and Remove: Carefully unplug the electrical connectors from the old module. Press the release tabs firmly to avoid damaging the clips. Then, unbolt the module from its mounting bracket.
- Install the New Module: Bolt the new, VIN-programmed TCM into place. Reconnect the electrical connectors, ensuring they click securely into position.
- Final Steps: Reconnect the negative battery terminal. Start the vehicle and allow it to idle for a few minutes. While the module is pre-programmed, it’s good practice to use a basic scan tool to clear any stored fault codes from the initial failure. Test drive the vehicle to confirm smooth shifting.
Verified Fitment Across the GM Lineup
This T42 TCM is a direct replacement for a wide range of General Motors vehicles equipped with 4-speed automatic transmissions like the 4L60E, 4L65E, and 4L80E. While this page focuses on the 2006-2014 Express 2500 TCM, it is also compatible with the following models. Please verify the location noted for your specific vehicle.
- Chevrolet: Avalanche, Cobalt, Colorado, Express 1500/2500/3500, HHR, Impala, Malibu, Monte Carlo, Silverado 1500/2500, SSR, Suburban, Tahoe
- GMC: Canyon, Envoy, Envoy XL, Savana 1500/2500/3500, Sierra 1500/2500, Yukon, Yukon XL
- Buick: Allure, LaCrosse, Lucerne, Rainier, Rendezvous
- Pontiac: G5, G6, Grand Prix, Pursuit
- Cadillac: DTS
- Hummer: H3
- Saturn: Aura, Ion, Vue
- Saab: 9-7X
This module is interchangeable with part numbers: 24252114, 24234503, 24230461, 24234274, 24235340, 24235754, 24238856, 24239224, 24239926, 24240400, 24241806, 24243901, 24243921, 24255280, 24256960, 24235732, 24235753, 24240449, YNXS.
Frequently Asked Questions
What does a VIN-programmed TCM actually mean?
It means we flash the module with your vehicle’s unique 17-digit Vehicle Identification Number (VIN) before shipping. This loads the correct software and calibrations for your specific engine, transmission, and options, making the part truly plug-and-play. It eliminates the need for a trip to the dealership for expensive programming.
Do I need to take my van to a mechanic after installing this part?
No. Because this module is pre-programmed to your VIN, no further programming is required. The installation is straightforward for a DIYer with basic tools or any professional mechanic. You simply install it, clear any old codes, and drive.
Where is this TCM located on my 2012 Express 2500 Van?
For the 2006-2014 Chevrolet Express and GMC Savana vans, the Transmission Control Module is consistently found in the engine compartment, mounted on the right (passenger side) of the vehicle.
Will replacing the TCM fix a P0700 trouble code?
A P0700 code is a general fault code indicating the TCM has detected a problem. While this module replacement often resolves the root cause (especially if other transmission codes are present), a proper diagnosis is always recommended. In a vast majority of cases where the TCM has failed internally, this part is the correct fix.
Is there a core charge? 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 at your convenience, saving you the time and hassle of return shipping.