Get Your Workhorse Van Back on the Road with a Reliable, Programmed TCM
If your 2006-2014 Chevrolet Express 3500 Van is suffering from erratic shifting, getting stuck in gear, or throwing transmission codes, a failing Transmission Control Module (TCM) is the most likely culprit. As the electronic brain of your automatic transmission, the TCM dictates every shift, manages torque converter lockup, and ensures your van operates efficiently. When it fails, your vehicle’s performance and reliability are severely compromised, costing you time and money.
This T42 TCM, part number 24243901, is the definitive solution. We pre-program it to your van’s specific Vehicle Identification Number (VIN) before shipping, which means it arrives ready for a true plug-and-play installation. You can bypass the expensive and time-consuming trip to the dealership for programming. This is a direct-fit replacement for the original module, designed to restore the crisp, smooth shifting you expect from your Express Van’s 4L80E transmission.
Case Study: A Tricky Diagnosis
A local delivery business brought in their 2011 Express 3500. The driver reported it was stuck in what felt like third gear (limp mode) and the check engine light was on. A quick scan showed a P0750 code, pointing to a shift solenoid issue. In my 20+ years of experience, I’ve learned that while the code points to a solenoid, the root cause on these GM vans is often the TCM itself. The internal drivers that control the solenoids fail from years of heat and vibration. Instead of a complex internal transmission repair, we installed a VIN-programmed 2006-2014 Express 3500 TCM. The van was shifting perfectly and back on its route in under an hour—a testament to diagnosing the controller, not just the code.
Is Your Express Van Showing These Warning Signs?
- ✔ Harsh, slamming shifts or delayed gear engagement.
- ✔ The vehicle is stuck in “limp mode” and won’t shift out of 2nd or 3rd gear.
- ✔ Check Engine Light or Transmission Warning Light is illuminated.
- ✔ Diagnostic Trouble Codes (DTCs) are present, such as P0700 (Transmission Control System Malfunction), P0750, P0751, or other solenoid-related faults.
- ✔ A noticeable drop in fuel economy or a feeling of sluggish performance.
- ✔ Complete failure to shift gears or intermittent loss of communication with the module.
A Straightforward Guide to Installation
For the Chevy Express and GMC Savana vans, this is one of the easier electronic module replacements you can do. The entire process typically takes less than 30 minutes with basic hand tools.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent electrical shorts and help reset the system.
- Locate the TCM: On your Express 3500 Van, the TCM is located in the engine compartment on the right-hand (passenger) side, typically mounted to the inner fender or near the battery.
- Disconnect and Remove: Carefully unplug the electrical connectors from the old module. Press the release tabs firmly. Then, unbolt the module from its mounting bracket.
- Install the New Module: Mount your new, pre-programmed TCM in the same location and securely fasten the bolts. Reconnect the electrical harnesses, ensuring they click into place.
- Final Steps: Reconnect the negative battery terminal. While our programming resolves most issues, it’s good practice to use a basic OBD2 scan tool to clear any stored fault codes from the vehicle’s memory.
Confirmed Vehicle Compatibility List
This T42 TCM is a direct replacement for a wide range of General Motors vehicles. While this page focuses on the 2006-2014 Express 3500 TCM, it is also compatible with the following models. Always verify your part number and vehicle options.
- Chevrolet: Express 1500/2500/3500 Van (06-14), Silverado 1500/2500 (07-13), Tahoe (07-09), Suburban 1500 (07-08), Avalanche 1500 (07-08), Impala (06-11), Monte Carlo (06-07), Cobalt (06-10), HHR (06-11), Colorado (08-12), SSR (05-06)
- GMC: Savana 1500/2500/3500 Van (06-14), Sierra 1500/2500 (07-13), Yukon & Yukon XL 1500 (07-09), Envoy (06-09), Canyon (08-12)
- Buick: LaCrosse (06-09), Lucerne (06-11), Allure (06-09), Rainier (06-07), Rendezvous (06-07)
- Cadillac: DTS (06-11)
- Pontiac: G6 (06-10), Grand Prix (06-08), G5 (07-10), Pursuit (06)
- Saturn: Vue (07-10), Aura (07-09), Ion (06-07)
- Hummer: H3 (08-10)
- Saab: 9-7X (06-09)
Do I need to program this TCM at a dealership?
Do I need to program this TCM at a dealership?
No. This module comes fully programmed to your vehicle’s VIN. It is a plug-and-play solution that does not require any additional programming or dealer visits, saving you hundreds of dollars.
Will this fix my transmission’s limp mode?
In most cases, yes. Limp mode (being stuck in one gear) is a primary symptom of a failed TCM. Replacing the faulty module with this pre-programmed unit is the standard repair for this condition.
What tools are needed for installation?
You’ll only need basic hand tools: typically a socket set (e.g., 10mm socket) to unbolt the module and a wrench to disconnect the battery terminal. No special equipment is required.
Is there a core charge for my old part?
No, there is no core charge. You can keep your old part or dispose of it without the hassle of returning it, making the process simpler and faster for you.
Does this part come with a warranty?
Yes, this Transmission Control Module is backed by a one-year warranty, giving you peace of mind and confidence in your repair.