Restore Peak Performance to Your Workhorse Van
If your 2006-2014 Chevrolet Express 2500 Van is suffering from transmission problems like unpredictable shifting, getting stuck in gear, or a glowing check engine light, a failing Transmission Control Module (TCM) is the most likely culprit. As a technician with over two decades of experience, I’ve seen firsthand how a faulty TCM can bring a reliable work van to a grinding halt. This isn’t just an inconvenience; it’s lost time and money. This T42 TCM, part number 24238856, is the definitive, hassle-free solution. It comes fully pre-programmed to your vehicle’s specific VIN, ensuring it works perfectly right out of the box—no expensive trip to the dealership required.
A Technician’s Notebook: The Misleading Solenoid Codes
A customer brought in a 2009 Sierra with classic symptoms—harsh 1-2 shift and a P0752 code for ‘Shift Solenoid A Stuck On’. They had already replaced the solenoid twice with no luck. After a quick check of the wiring harness, my experience pointed straight to the T42 TCM. The internal drivers for the solenoids had failed, sending faulty signals. We installed a VIN-programmed module, cleared the codes, and the truck shifted like new. It’s a classic case where the code points to a component, but the root cause is the module controlling it. This highlights why replacing your 2006-2014 Express 2500 TCM with a quality, programmed unit is often the correct first step.
Is Your Express Van Showing These Red Flags?
- ✔ Harsh, banging shifts or unpredictable gear changes.
- ✔ The vehicle is stuck in “limp mode,” often in 2nd or 3rd gear, with limited power.
- ✔ Check Engine Light or Transmission Warning Light is illuminated on the dash.
- ✔ Your scan tool shows Diagnostic Trouble Codes (DTCs) like P0700 (Transmission Control System Malfunction), P0750, or other solenoid-specific codes.
- ✔ A noticeable drop in fuel economy or the transmission seems to be overheating.
- ✔ The transmission fails to upshift or downshift correctly, or experiences delayed engagement from Park to Drive.
Get Your Van Back to Work: A 30-Minute Install Guide
Installing your new 2006-2014 Express 2500 TCM is a straightforward job that most DIYers can complete in their own driveway. No specialized tools are needed.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts and to help reset the vehicle’s computer systems.
- Locate the Module: On most Express and Savana vans, you’ll find the TCM in the engine compartment on the right-hand (passenger) side. It’s a silver box with electrical connectors.
- Disconnect and Remove: Carefully unplug the electrical connectors. Press the release tabs firmly. Then, unbolt the module from its mounting bracket.
- Install the New TCM: Bolt the new, pre-programmed module into place. Securely plug in the electrical connectors until they click, ensuring a solid connection.
- Final Steps: Reconnect the negative battery terminal. While the module is plug-and-play, it’s best practice to use a basic OBD2 scan tool to clear any stored transmission codes. Start the vehicle and test drive to confirm smooth shifting.
Verified Fitment for Your General Motors Vehicle
This module is a direct replacement for part number 24238856 and other interchangeable numbers. It is guaranteed to fit the following models:
- Chevrolet Express / GMC Savana 1500, 2500, 3500 Van (2006-2014): Transmission; (RH engine compartment)
- Chevrolet Silverado / GMC Sierra 1500, 2500 (2007-2013): Transmission; (next to battery)
- Chevrolet Tahoe / GMC Yukon (2007-2009): Transmission; (next to battery)
- Chevrolet Impala (2006-2011): Transmission; (lower air cleaner housing)
- Chevrolet Cobalt / HHR (2006-2011): Transmission; (LH engine compartment or strut tower)
- Cadillac DTS (2006-2011): Transmission; (RH front engine compartment)
- Buick LaCrosse / Lucerne (2006-2011): Transmission; (lower air cleaner housing or LH engine compartment)
- Pontiac G6 / Grand Prix (2006-2010): Transmission; (LH strut tower or lower air cleaner housing)
- Hummer H3 (2008-2010): Transmission; (RH rear engine compartment)
- …and many other GM vehicles from 2006-2014. Please verify your part number.
Do I need to have this TCM programmed by a dealer?
Do I need to have this TCM programmed by a dealer?
No. This module comes pre-programmed to your vehicle’s VIN. You simply provide your VIN at checkout, and we handle all the programming. It’s a true plug-and-play solution, saving you hundreds in dealership fees.
Will this fix a P0700 trouble code?
Yes. The P0700 code is a general fault code indicating the TCM has detected a problem. In a vast majority of cases, replacing a faulty TCM with this programmed unit will resolve the P0700 code and any related solenoid codes.
Is this a new or used part?
This is an OEM-quality replacement part, built to the highest standards for reliability and longevity. It is not a used part pulled from a junkyard. It is inspected and programmed to ensure it performs correctly.
What is the warranty on this 2006-2014 Express 2500 TCM?
This part is backed by our one-year, hassle-free warranty. We stand behind the quality of our programmed electronics to give you complete peace of mind with your repair.
Is there a core charge?
No, there is no core charge for this part. You can keep your old module without the hassle or expense of sending it back.