Is Your Chevrolet Express Van Shifting Erratically?
If your 2006-2014 Chevrolet Express 1500 is experiencing harsh shifts, getting stuck in gear, or showing transmission-related error codes, a failing Transmission Control Module (TCM) is the most likely culprit. The TCM is the electronic brain of your automatic transmission, responsible for orchestrating every gear change, managing torque converter lockup, and monitoring system health. When it fails, it can cause a cascade of problems that make your reliable workhorse feel unpredictable and unsafe. This replacement T42 TCM is the definitive solution to restore your van’s performance and dependability.
From the Diagnostic Bay
We had a 2011 Express 2500 work van come into the shop that was stuck in third gear—classic limp mode. The driver couldn’t get above 40 mph, and the check engine light was glaring. A quick scan showed a P0700 (Transmission Control System Malfunction) and a handful of solenoid circuit codes. After verifying the wiring was intact, we knew the TCM was the issue. Instead of a costly trip to the dealer for a new module and programming fees, the customer opted for one of our pre-programmed units. We swapped it out in under 30 minutes right in the engine bay, cleared the codes, and the van was shifting perfectly on the test drive. It’s a common failure, but thankfully, a straightforward fix.
Symptoms of a Failing Express 1500 Transmission Module
A faulty TCM can manifest in several ways, often starting as an intermittent annoyance before becoming a constant problem. If you notice any of the following signs, it’s time to inspect your vehicle’s transmission computer.
- ✔ Harsh, delayed, or erratic gear shifting.
- ✔ Vehicle is stuck in a single gear (limp mode), often 2nd or 3rd.
- ✔ Check Engine Light or Transmission Warning Light is illuminated on the dash.
- ✔ Diagnostic Trouble Codes (DTCs) such as P0700, P0750, P0753, P0758, or other solenoid-related faults are present.
- ✔ Inability to upshift or downshift properly, leading to poor acceleration.
- ✔ A noticeable decrease in fuel economy.
- ✔ The transmission seems to slip out of gear unexpectedly.
The Plug-and-Play Solution: VIN Programmed for Your Van
The biggest hurdle in replacing modern electronic modules is the need for expensive, dealer-specific programming. We eliminate that step entirely. This Express 1500 Transmission Module arrives at your door pre-programmed with the latest GM software, specifically calibrated to your vehicle’s unique Vehicle Identification Number (VIN). This ensures 100% compatibility and communication with your van’s other systems, like the Engine Control Module (ECM), right out of the box. No trips to the dealership, no extra tools, and no hidden fees. Simply install the module, and you’re ready to go.
Built to meet or exceed original equipment specifications, this module is constructed for durability and long-term reliability. It directly interchanges with a wide range of part numbers, including 24252114, 24234503, 24230461, 24241806, and more, making it the ideal replacement for a vast number of GM trucks, vans, and SUVs equipped with 4-speed automatic transmissions like the 4L60E, 4L65E, and 4L70E.
Frequently Asked Questions
What does this Transmission Control Module do?
The TCM acts as the central computer for your automatic transmission. It receives data from various sensors (like vehicle speed and engine RPM) to control shift solenoids, regulate hydraulic pressure, and manage torque converter clutch engagement for smooth and efficient operation.
Is this part truly plug-and-play?
Yes. We pre-program the module using the VIN you provide during checkout. This ensures it has the correct software and calibration for your specific 2006-2014 Express 1500, allowing for a direct installation without any need for further programming.
Where is the TCM located on my Express van?
On the Chevrolet Express and GMC Savana vans from 2006-2014, the transmission control module is typically located in the engine compartment on the right-hand (passenger) side.
Will this fix my P0700 trouble code?
A P0700 code is a general fault code indicating the TCM has detected a problem and has requested the check engine light be turned on. While this module will resolve the issue if the TCM itself is the source of the fault, you should always diagnose any accompanying specific codes (like solenoid circuit codes) to confirm the root cause.
Do I need to return my old part?
No, there is no core charge for this part. You can keep your old module, which saves you the time and expense of shipping a core back.