Restore Your Van’s Shifting Performance
Is your 2006-2014 Chevrolet Express 3500 van suffering from harsh shifts, delayed gear engagement, or getting stuck in limp mode? These are classic signs of a failing Transmission Control Module (TCM). 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 frustrating and potentially damaging issues, from poor fuel economy to a complete inability to shift gears. This replacement GM T42 TCM, service number 24235340, is the definitive solution to restore your vehicle’s factory performance.
From the Diagnostic Bay
We had a 2011 Savana 2500 work van come into the shop that the owner was ready to give up on. He’d already replaced two shift solenoids and the transmission fluid, but it was still shifting erratically and throwing a P0700 code. The van would intermittently refuse to shift out of 2nd gear, making it a hazard on the road. After a quick scan, we saw communication errors between the ECM and TCM. Instead of throwing more parts at the transmission itself, we identified the faulty T42 module. We installed one of our VIN-programmed units, cleared the codes, and the van drove like new. The customer was thrilled to have his reliable workhorse back without the expense of a full transmission rebuild.
Why Choose Our VIN-Programmed 2006-2014 Express 3500 TCM?
The key to a successful and hassle-free repair is our VIN-programming service. Each module is meticulously programmed with the latest GM software updates specific to your Express 3500’s Vehicle Identification Number. This critical step ensures that the TCM communicates flawlessly with your vehicle’s other computers, like the Engine Control Module (ECM), right out of the box. You get optimal shift points, correct torque converter operation, and restored fuel efficiency without needing an expensive trip to the dealership for programming. It’s a true plug-and-play solution designed for both professional technicians and DIY installers.
Is Your Express Van Showing These Symptoms?
- ✔ Harsh, erratic, or delayed gear shifts.
- ✔ Vehicle is stuck in a single gear (limp mode).
- ✔ Check Engine Light or Transmission Warning Light is illuminated.
- ✔ Diagnostic Trouble Codes (DTCs) like P0700, P0750, or other solenoid-related codes are present.
- ✔ Failure to upshift or downshift correctly.
- ✔ A noticeable decrease in fuel economy.
- ✔ Intermittent loss of communication with the transmission module.
This module is a direct replacement for a wide range of GM vehicles equipped with 4-speed automatic transmissions like the 4L60E, 4L65E, and 4L70E. It is interchangeable with numerous part numbers, including 24252114, 24234503, and 24242391, making it a versatile solution for many models from Chevrolet, GMC, Buick, Cadillac, and more. Built to strict OEM specifications, our 2006-2014 Express 3500 TCM is backed by a one-year warranty, giving you confidence and peace of mind in your repair.
Frequently Asked Questions
What does the T42 TCM do in my Express van?
The T42 Transmission Control Module (TCM) acts as the central computer for your automatic transmission. It processes data from various sensors (like vehicle speed and engine load) to control shift solenoids, regulate hydraulic pressure, and manage the torque converter clutch. This ensures smooth, efficient, and timely gear changes for optimal driving performance.
Why is VIN programming so important for this part?
VIN programming loads your vehicle’s specific software and calibrations onto the module. Without it, the TCM won’t communicate correctly with your van’s engine computer and other systems. This can lead to persistent shifting problems, incorrect gear ratios, and warning lights. Our pre-programming service eliminates the need for dealership tools, making the installation process simple and effective.
Can I install this 2006-2014 Express 3500 TCM myself?
Yes, this is a common DIY repair. On most Express and Savana vans, the TCM is located in the engine compartment on the right-hand side, making it easily accessible. The process typically involves disconnecting the battery, unplugging the electrical connectors, unbolting the old module, and installing the new one. The entire job can often be completed in under 30 minutes with basic hand tools.
Will this fix my P0700 trouble code?
A P0700 code is a general fault code indicating that the TCM has detected a problem and has requested the Check Engine Light to be turned on. While a faulty TCM is a very common cause for this code, it’s important to scan for other transmission-specific codes (e.g., P07xx series) to confirm the diagnosis. In many cases, replacing a failed TCM will resolve the P0700 and related codes.
Is there a core charge for this module?
No, we do not require a core charge for this part. You can complete your repair without the hassle and expense of shipping your old, non-functional module back to us.