Restore Your Van’s Shifting with a Pre-Programmed T42 TCM
If your 2006-2014 Chevrolet Express 1500 Van is suffering from harsh shifting, getting stuck in gear, or throwing transmission codes, the culprit is often a failing Transmission Control Module (TCM). As a seasoned technician, I’ve seen countless work vans sidelined by this exact issue. Downtime isn’t just an inconvenience; it’s lost revenue. This OEM-quality T42 TCM, part number 24256960, is the reliable, no-hassle solution to get your workhorse back on the road and earning its keep.
The TCM is the brain of your automatic transmission, managing everything from shift points to torque converter clutch engagement. When it fails, communication between the engine and transmission breaks down, leading to the unpredictable performance you’re likely experiencing. Our modules solve this by coming pre-programmed to your van’s specific Vehicle Identification Number (VIN). This means no expensive trips to the dealership for programming—it’s a true plug-and-play fix that you or your mechanic can perform quickly.
Case Study: The Fleet Van’s Ghost Problem
A local contractor brought in his Express 1500, complaining of intermittent ‘banging’ into gear and occasional failure to shift out of 2nd. His previous mechanic couldn’t find the issue because it wouldn’t act up consistently. After hooking up my scan tool, I saw a history of solenoid circuit codes (P0750 series) and a generic P0700 transmission fault. Experience told me this wasn’t a bad solenoid but a failing driver inside the TCM. We installed one of our VIN-programmed T42 modules. The problem disappeared instantly. He saved hundreds on diagnostic labor and avoided a potential, and unnecessary, transmission rebuild.
Is Your Express Van Showing These Telltale Signs?
A faulty Express 1500 Van TCM can manifest in several ways. If you’re noticing any of the following, it’s time for a replacement:
- ✔ Harsh, slamming shifts or delayed gear engagement.
- ✔ Vehicle is stuck in “limp mode” (usually 2nd or 3rd gear).
- ✔ The Check Engine Light or transmission warning light is on.
- ✔ Diagnostic Trouble Codes (DTCs) like P0700, P0753, P0758, or other solenoid-related faults are present.
- ✔ Poor fuel economy and a feeling of sluggish performance.
- ✔ Complete loss of communication with the transmission.
Get Your Van Back to Work: A Quick Installation Guide for Your Express 1500 Van TCM
This is a straightforward job for a DIYer with basic tools. For the Chevy Express and GMC Savana vans, the process is especially simple.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent electrical shorts and help reset the system.
- Locate the TCM: On the 2006-2014 Express and Savana vans, the TCM is conveniently located in the engine compartment on the right-hand (passenger) side, often near the firewall or inner fender.
- Disconnect and Remove: Carefully unplug the electrical connectors. Press the release tabs firmly. Then, unbolt the module from its mounting bracket.
- Install the New Module: Bolt the new, pre-programmed TCM into place. Reconnect the electrical harnesses, ensuring they click securely into position.
- Final Steps: Reconnect the battery terminal. While our VIN programming handles the critical setup, it’s always good practice to use a basic scan tool to clear any stored fault codes from other modules. Start the vehicle and test drive to confirm smooth shifting.
Verified Compatibility for Your GM Vehicle
This T42 TCM is a direct replacement for part number 24256960 and other service numbers. It fits a wide range of GM vehicles equipped with 4-speed automatic transmissions like the 4L60E, 4L65E, and 4L70E. Please verify your model and year below:
- Chevrolet Express 1500/2500/3500 Van (2006-2014) – RH engine compartment
- GMC Savana 1500/2500/3500 Van (2006-2014) – RH engine compartment
- Chevrolet Silverado & GMC Sierra 1500/2500 (2007-2013) – Next to battery
- Chevrolet Tahoe & GMC Yukon (2007-2009) – Next to battery
- Chevrolet Impala (2006-2011) – Lower air cleaner housing
- And many more GM cars, trucks, and SUVs. See the full fitment list for details.
Frequently Asked Questions
Frequently Asked Questions
Do I need to program this module at a dealership?
No. We pre-program this module to your vehicle’s VIN before shipping. It arrives ready for plug-and-play installation, saving you time and the high cost of dealer programming.