Get Your Workhorse Van Back on the Road with a Reliable Transmission Fix
Is your 2006-2014 Chevrolet Express 1500 van suffering from erratic shifting, getting stuck in gear, or throwing transmission codes? As a technician with over two decades of experience, I know that downtime for a work vehicle isn’t just an inconvenience—it’s lost income. The T42 Transmission Control Module (TCM) is the electronic brain of your automatic transmission, and when it fails, it can cause a host of frustrating and costly problems. This replacement TCM, part number 24252114, is the definitive solution to restore your van’s performance and reliability.
We take the guesswork and extra cost out of the repair. Each module is expertly programmed to your van’s specific Vehicle Identification Number (VIN) before it ships. This means no expensive trips to the dealership for programming. It arrives at your door ready for a true plug-and-play installation, immediately syncing with your vehicle’s systems to deliver smooth, precise shifts just like it did from the factory. This is the most efficient way to solve the issues caused by a faulty 2006-2014 Express 1500 Van TCM and get your business moving again.
Case Study: A Tricky Diagnosis
I once had a 2011 Express 1500 work van come into my shop. The owner, a plumber, was frustrated. His van would randomly refuse to shift out of 2nd gear (limp mode) and was throwing a generic P0700 code. He had already replaced two shift solenoids based on another shop’s advice, but the problem persisted. After a quick diagnostic check, I suspected the TCM. The internal circuits on these modules can develop micro-fractures from heat and vibration over thousands of miles. We installed one of our pre-programmed T42 modules, and in less than an hour, the van was shifting perfectly. The customer was back on the job the same day, a testament to how a correct diagnosis and a pre-programmed part can save significant time and money.
Is Your Express Van Showing These Telltale Signs?
A failing 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” and won’t shift past 2nd or 3rd gear.
- ✔ The Check Engine Light is on with transmission-related Diagnostic Trouble Codes (DTCs) like P0700, P0750, P0755, or other solenoid circuit faults.
- ✔ Complete loss of shifting capability, either up or down.
- ✔ A noticeable drop in fuel economy or signs of the transmission overheating.
- ✔ Intermittent communication loss with the transmission module.
A Straightforward Guide to Installation
Replacing the 2006-2014 Express 1500 Van TCM is a job most DIYers or any professional mechanic can handle in under 30 minutes. On the Express and Savana vans, the module is conveniently located in the engine compartment on the right-hand (passenger) side.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- Locate the Module: Find the TCM on the RH side of the engine bay. It will have several large electrical connectors attached.
- Disconnect and Remove: Carefully unplug the wiring harnesses. They have locking tabs that need to be released. Once disconnected, unbolt the old module from its mounting bracket.
- Install the New Module: Bolt the new, pre-programmed TCM into place. Securely plug in the wiring harnesses, ensuring each connector clicks firmly into place.
- Final Steps: Reconnect the battery terminal. While the module is plug-and-play, it’s good practice to use a basic OBD2 scan tool to clear any stored fault codes from the vehicle’s memory. Start the engine and take a test drive 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 4L70E. While this page is focused on the 2006-2014 Express 1500 Van TCM, this part is also compatible with the following models. Please verify your specific model and part number.
Interchangeable Part Numbers: 24252114, 24242391, 24234503, 24230461, 24234274, 24235340, 24235754, 24238856, 24239224, 24239926, 24240400, 24241806, 24243901, 24243921, 24255280, 24256960, and more.
- Chevrolet Express/GMC Savana (1500, 2500, 3500) 2006-2014
- Chevrolet Silverado/GMC Sierra (1500, 2500) 2007-2013
- Chevrolet Tahoe/GMC Yukon 2007-2009
- Chevrolet Impala 2006-2011
- Chevrolet Cobalt & HHR 2006-2011
- Cadillac DTS 2006-2011
- Buick LaCrosse & Lucerne 2006-2011
- And many other GM cars, trucks, and SUVs from 2006-2014.
Frequently Asked Questions
Do I need to take my van to the dealer after installing this?
No. This module is pre-programmed to your vehicle’s VIN before shipping. This makes it a plug-and-play solution, saving you the time and expense of a dealership visit for programming.
Is this part difficult to install myself?
Not at all. For a 2006-2014 Express 1500 Van, the TCM is easily accessible in the engine bay. With basic hand tools, the replacement can typically be completed in under 30 minutes, making it a great DIY-friendly repair.
Will this fix a P0700 trouble code?
A P0700 code is a general fault request from the TCM to the main engine computer (ECM) to turn on the check engine light. While P0700 itself doesn’t pinpoint the TCM, it’s very often present when the TCM has failed and is setting other specific transmission codes. Replacing a faulty TCM is the correct fix in many of these cases.
What is a core charge?
A core charge is a deposit you pay until you return your old part. We do not require a core charge for this module, which simplifies your purchase. You can keep or dispose of your old part without any hassle.
What kind of warranty is included?
This transmission control module comes with a one-year warranty, giving you peace of mind and confidence in your repair.