If your 2006-2014 Chevrolet Express 2500 Van is suffering from erratic shifting, getting stuck in gear, or throwing transmission codes, you’re not just dealing with an annoyance—you’re losing reliability and money. As the brain of your automatic transmission, a failing Transmission Control Module (TCM) can bring your workhorse to a grinding halt. This OEM-quality T42 TCM, part number 24255280, is the definitive solution, arriving expertly programmed to your van’s specific VIN for a true plug-and-play repair.
Forget about expensive dealership visits and the hassle of post-installation programming. We handle the complex part for you. By flashing this module with the latest GM software updates tied directly to your vehicle, we ensure it communicates flawlessly with your van’s engine and transmission components right out of the box. This restores the precise, smooth shifting and torque converter lockup you depend on, getting your van back in service fast.
Case Study: A Tricky Diagnosis
A local contractor brought in his ’11 Express 2500 work van with a frustrating problem. He said it would randomly refuse to shift out of 2nd gear, especially after getting hot on a long job. He’d already replaced a shift solenoid with no luck. After connecting my scan tool, I saw a generic P0700 code but also intermittent communication loss with the TCM. Instead of throwing more parts at it, we inspected the module itself. These T42 TCMs, often mounted in the hot engine bay, can suffer from internal circuit board failures over time. We installed one of our VIN-programmed modules, and the problem was solved instantly. It wasn’t a mechanical fault inside the transmission; it was the computer controlling it. This is a repair I’ve done hundreds of times, and a pre-programmed module is the most efficient fix.
Is Your Express Van Showing These Red Flags?
A faulty TCM can manifest in several ways. If you’re experiencing any of the following, it’s a strong indicator that your module needs replacement:
- ✔ Harsh, slamming shifts or delayed gear engagement.
- ✔ Vehicle is stuck in “limp mode” (usually 2nd or 3rd gear) to protect the transmission.
- ✔ The Check Engine Light or a transmission warning light is on.
- ✔ Diagnostic Trouble Codes (DTCs) are present, such as P0700 (Transmission Control System Malfunction), P0750, or other solenoid-specific codes.
- ✔ Inability to upshift or downshift, leading to poor acceleration and terrible fuel economy.
- ✔ Complete loss of communication with the TCM, preventing diagnostics.
Straightforward 30-Minute Installation Guide
Getting your van back to peak performance is easier than you think. This is a job most DIYers or any professional mechanic can complete in under half an hour with basic tools.
- 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 Chevrolet Express 2500 Van, the TCM is typically found in the engine compartment on the right-hand (passenger) side.
- Remove the Old Module: Carefully disconnect the electrical connectors. Then, unbolt the old module from its mounting bracket.
- Install the New Module: Mount your new, pre-programmed TCM and securely reconnect the electrical harnesses. Ensure they click into place.
- Final Steps: Reconnect the battery terminal. While our programming resolves most issues, it’s good practice to use a basic scan tool to clear any stored historical DTCs from the vehicle’s memory.
Verified Fitment Across the GM Lineup
While this is the perfect 2006-2014 Express 2500 Van TCM, this versatile T42 module is also a direct replacement for a wide range of GM cars, trucks, and SUVs equipped with transmissions like the 4L60E, 4L65E, and 4L80E. It is interchangeable with part numbers 24252114, 24234503, 24230461, 24234274, 24255280, and others. Please verify your specific model in the list below:
- Chevrolet Express 1500/2500/3500 Van (2006-2014)
- GMC Savana 1500/2500/3500 Van (2006-2014)
- Chevrolet Silverado & GMC Sierra (Various models 2007-2013)
- Chevrolet Tahoe, Suburban & GMC Yukon (Various models 2007-2009)
- Chevrolet Avalanche (2007-2008)
- Chevrolet Colorado & GMC Canyon (2008-2012)
- Hummer H3 (2008-2010)
- Cadillac DTS (2006-2011)
- Buick LaCrosse & Lucerne (Various models 2006-2011)
- Pontiac G6 & Grand Prix (Various models 2006-2010)
- And many more. Check the full fitment list for details.
Frequently Asked Questions
What does VIN programming mean for me?
It means this module is ready for installation the moment you receive it. We load your van’s specific Vehicle Identification Number (VIN) and the latest GM software onto the module before shipping. This eliminates the need for a trip to the dealership for expensive programming, saving you time and money.
Do I need to take my van to a dealer after installation?
No. Because the module comes pre-programmed to your VIN, it is designed to be a direct-fit, plug-and-play solution. No further calibration or dealer intervention is required.
Where is the TCM located on my 2006-2014 Express 2500 Van?
On the Express and Savana vans, the Transmission Control Module is consistently located in the engine bay, on the right-hand (passenger side) of the vehicle.
Will this fix a P0700 trouble code?
A P0700 code is a general fault code indicating the TCM has detected a problem. While this module often resolves the root cause (like an internal TCM failure), P0700 can also be triggered by issues like faulty solenoids or wiring. However, if you’re experiencing other symptoms like limp mode or erratic shifting, a failing TCM is the most common culprit.
Is there a core charge for this part?
No, there is no core charge. You are not required to send your old, faulty module back to us, which simplifies the repair process for you.