Fix Your Van’s Shifting Problems for Good
If your 2006-2014 Chevrolet Express 2500 Van is suffering from harsh shifting, getting stuck in gear, or throwing transmission codes, you know how frustrating and costly downtime can be. As a technician with over two decades of experience, I’ve seen countless work vans sidelined by a faulty Transmission Control Module (TCM). This isn’t just an inconvenience; it’s a direct hit to your productivity. This OEM-quality T42 TCM, part number 24255280, is the definitive solution. It arrives pre-programmed to your van’s specific VIN, making it a true plug-and-play fix that gets you back on the road without an expensive trip to the dealership.
From the Diagnostic Bay: The Case of the Slipping Fleet
A local delivery company brought me one of their 2011 Express 2500 workhorses. The driver reported it was randomly slamming into gear and occasionally wouldn’t shift past 2nd. A quick scan showed a P0700 (Transmission Control System Malfunction) and a few solenoid circuit codes. After checking the wiring, I knew the TCM was the culprit. The fleet manager was worried about having the van out of commission for days waiting on a dealer appointment. Instead, we ordered one of these VIN-programmed modules. It arrived the next day, I installed it in under 20 minutes, and the van was back in service that afternoon. They were so impressed they had me replace the TCMs on two more of their vans as a preventative measure.
Is Your Express Van Showing These Red Flags?
A failing TCM doesn’t get better on its own. It’s the electronic brain of your transmission, and when it fails, the symptoms are impossible to ignore. Look out for these common signs:
- ✔ Harsh, clunky, or erratic gear changes.
- ✔ The vehicle is stuck in “limp mode” (usually 2nd or 3rd gear).
- ✔ Check Engine Light or Transmission Warning Light is illuminated.
- ✔ Diagnostic Trouble Codes (DTCs) are present, especially P0700, P0750, or other solenoid-related faults.
- ✔ Delayed engagement when shifting from Park to Drive or Reverse.
- ✔ Poor fuel economy and a feeling of lost power.
- ✔ Complete failure to shift or loss of communication with the module.
Your 30-Minute Path to a Smooth-Shifting Van
Replacing the TCM on your Express Van is a straightforward job that most DIYers or any professional can handle quickly. The key is its location and the pre-programmed convenience.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts and to help reset the system.
- Locate the Module: On the Express 2500 Van, the TCM is typically found in the engine compartment on the right-hand (passenger) side.
- Disconnect and Remove: Carefully unplug the electrical connectors. Use a small screwdriver to release the locking tabs if necessary. Then, unbolt the module from its mounting bracket.
- Install the New TCM: Mount the new module securely onto the bracket and firmly reconnect the electrical harnesses. You should hear a ‘click’ as they lock into place.
- Final Steps: Reconnect the battery terminal. While our programming handles the critical setup, it’s best practice to use a basic OBD2 scan tool to clear any stored fault codes from the vehicle’s memory. Start the van and enjoy smooth, reliable shifting.
Verified to Fit These General Motors Vehicles
This T42 TCM is a direct replacement for a wide range of GM cars, trucks, and SUVs equipped with 4-speed automatic transmissions like the 4L60E, 4L65E, 4L70E, and 4L80E. It is interchangeable with part numbers 24252114, 24234503, 24230461, and more. Please verify your vehicle is on the list 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
- Cadillac DTS (2006-2011) – RH front engine compartment
- Chevrolet Impala (2006-2011) – Lower air cleaner housing
- Hummer H3 (2008-2010) – RH rear engine compartment
- …and many other GM models from 2006-2014.
Frequently Asked Questions
Do I need to take my van to the dealer for programming?
No. This module comes fully programmed to your vehicle’s VIN. It is a plug-and-play solution that requires no additional programming, saving you time and money.
Will this fix a P0700 trouble code?
A P0700 code indicates a general fault in the transmission control system. In many cases, a failing TCM is the root cause. Replacing it with this module will often resolve the P0700 and any related solenoid codes.
Where is the TCM located on my 2009 Express 2500 Van?
For the 2006-2014 Express and Savana vans, the TCM is consistently located in the engine bay, on the right-hand (passenger) side.
Is there a core charge for my old part?
No, there is absolutely no core charge. You can keep your old part or dispose of it without the hassle of sending it back.
What kind of warranty is included?
This module is backed by our one-year, hassle-free warranty, giving you peace of mind and confidence in your repair.