If your 2006-2014 Chevrolet Express 2500 Van is suffering from erratic shifting, getting stuck in gear, or has an illuminated check engine light, a failing Transmission Control Module (TCM) is the most likely culprit. As a shop owner, I’ve seen countless work vans sidelined by these exact issues, costing businesses time and money. This T42 TCM, part number 24235754, is the definitive, reliable solution to restore your transmission’s performance and get your van back to work.
This isn’t just a replacement part; it’s a complete solution. We pre-program each module to your van’s specific Vehicle Identification Number (VIN) before shipping. This crucial step ensures it communicates perfectly with your van’s powertrain computer right out of the box, eliminating the need for a costly and time-consuming trip to the dealership for programming. It’s a true plug-and-play fix for professional mechanics and savvy DIYers alike.
Case Study: The Intermittent Limp Mode Nightmare
A local delivery company brought in their 2012 Express 2500, complaining of a frustrating intermittent issue. The van would randomly refuse to shift past 2nd gear (limp mode) and throw a generic P0700 transmission fault code. They’d already replaced a shift solenoid with no luck. After a quick diagnostic, we identified the TCM as the weak link. The internal circuits were failing under heat, causing the intermittent communication loss. We installed one of our pre-programmed T42 modules, and the van was back on its route the same afternoon—no more random limp mode, and the fault codes were gone for good. This is the kind of reliable fix your workhorse vehicle deserves.
Is Your Express Van Showing These Red Flags?
A faulty 2006-2014 Express 2500 TCM can manifest in several ways. If you’re experiencing any of the following, it’s time for a replacement:
- ✔ Harsh, slamming shifts or delayed gear engagement.
- ✔ The vehicle is stuck in one gear, often called “limp mode.”
- ✔ Check Engine Light or Transmission Warning Light is on with codes like P0700, P0750, or other solenoid-related faults.
- ✔ Failure to upshift or downshift, leading to poor acceleration and terrible fuel economy.
- ✔ Inaccurate speedometer readings or complete loss of communication with the transmission.
Your Quick Guide to a Hassle-Free Installation
You can get this job done in your own garage in under 30 minutes. Here’s how:
- Safety First: Always disconnect the negative terminal from your vehicle’s battery to prevent electrical shorts and reset the onboard computers.
- Locate the Module: On the Express 2500 Van, the TCM is typically found in the engine compartment on the right-hand (passenger) side.
- Swap the Part: Carefully disconnect the wiring harnesses from the old TCM. Unbolt it from its mounting bracket and set it aside. Bolt the new module in its place and securely reconnect the wiring harnesses.
- Final Steps: Reconnect the battery terminal. While the system often resets itself, it’s best practice to use a basic OBD2 scan tool to confirm all transmission-related Diagnostic Trouble Codes (DTCs) are cleared.
Confirmed Vehicle Compatibility
This T42 TCM is a direct-fit replacement for a wide range of General Motors vehicles equipped with 4-speed automatic transmissions like the 4L60E, 4L65E, 4L70E, and 4L80E. While this page is for the 2006-2014 Express 2500 TCM, it also fits the following models. Please verify the location noted for your specific vehicle:
- Chevrolet Avalanche 1500 (07-08): Next to battery
- Chevrolet Cobalt (06-10): LH strut tower
- Chevrolet Colorado (08-12): RH rear engine compartment
- Chevrolet Express 1500/2500/3500 Van (06-14): RH engine compartment
- Chevrolet HHR (06-11): LH engine compartment
- Chevrolet Impala (06-11): Lower air cleaner housing
- Chevrolet Monte Carlo (06-07): Lower air cleaner housing
- Chevrolet Silverado 1500/2500 (07-13): Next to battery
- GMC Canyon (08-12): RH rear engine compartment
- GMC Envoy / Envoy XL (06-09): LH engine compartment
- GMC Savana 1500/2500/3500 Van (06-14): RH engine compartment
- GMC Sierra 1500/2500 (07-13): Next to battery
- GMC Yukon / Yukon XL 1500 (07-09): Next to battery
- Buick Allure / LaCrosse (06-09): Lower air cleaner housing
- Buick Lucerne (06-11): LH engine compartment
- Cadillac DTS (06-11): RH front engine compartment
- Hummer H3 (08-10): RH rear engine compartment
- Pontiac G5 / G6 (06-10): LH strut tower
- Saturn Aura / Ion / Vue (06-10): Location varies (LH frame rail, strut tower, etc.)
Frequently Asked Questions
What does a ‘VIN-programmed’ TCM actually mean?
It means we load your vehicle’s unique 17-digit VIN into the module before it ships. This ensures the TCM has the correct software and calibration files for your specific engine, transmission, and options, allowing it to work perfectly upon installation without any additional steps.
Do I need to take my van to a dealer after installation?
No. Our VIN programming service completely eliminates the need for dealership intervention. This is a plug-and-play solution designed to save you time and the high cost of dealer programming.
Where is the TCM located on my 2011 Express 2500?
For the 2006-2014 Chevrolet Express 2500 Van, the Transmission Control Module is consistently located in the engine bay, on the right-hand (passenger) side.
Will this part fix a P0700 trouble code?
Yes, in many cases. The P0700 code is a generic fault code indicating the TCM has detected a problem. If the TCM itself is the source of the electrical fault, replacing it with this module will resolve the issue and allow you to clear the code.
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, saving you the hassle and expense of return shipping.