Restore Your Van’s Shifting Performance and Reliability
If your 2006-2014 Chevrolet Express 1500 Van is suffering from harsh shifting, getting stuck in gear, or throwing transmission codes, the culprit is often a failing Transmission Control Module (TCM). As a work vehicle, downtime is not an option. This T42 TCM, service part number 24255280, is the definitive solution to get your van back in service quickly and reliably. It arrives pre-programmed to your van’s specific VIN, eliminating the need for expensive dealership visits and ensuring a seamless, plug-and-play installation.
Over my 20+ years in the bay, I’ve seen countless GM vehicles, especially workhorses like the Express, come in with baffling transmission issues. More often than not, the problem lies with the electronics, not the expensive mechanical components. Replacing the TCM with a properly programmed unit is the most effective and economical repair for symptoms like limp mode and erratic gear hunting. This module directly controls the 4L60E, 4L65E, or 4L70E transmission, restoring the crisp, predictable shifting you depend on.
Case Study: The Ghost in the Transmission
A local delivery business brought in their 2011 Express 1500, complaining of intermittent ‘no-shift’ conditions and a persistent P0700 code. They had already spent a small fortune at another shop that replaced two solenoids with no success. The van was unreliable, costing them money every day it was off the road. We scanned it and confirmed the generic TCM code. Instead of guessing, we installed one of our VIN-programmed T42 modules. The installation took less than 20 minutes. After a quick battery disconnect to clear the memory, the van shifted perfectly on the test drive. The codes were gone, and the client had their essential vehicle back the same day. This is a classic example of how a faulty 2006-2014 Express 1500 TCM can mimic internal transmission failure.
Is Your Express Van Showing These Telltale Signs?
A failing TCM can manifest in several ways. If you’re experiencing any of the following, it’s a strong indicator that your module needs replacement:
- ✔ Vehicle is stuck in one gear (often 2nd or 3rd), also known as “limp mode.”
- ✔ Harsh, slamming shifts or delayed gear engagement from a stop.
- ✔ The Check Engine Light or Transmission Warning Light is on.
- ✔ Diagnostic Trouble Codes (DTCs) are present, such as P0700 (Transmission Control System Malfunction), P0750-P0758 (Shift Solenoid errors), or other transmission-related faults.
- ✔ Poor fuel economy due to incorrect gear selection or torque converter lock-up issues.
- ✔ Complete loss of communication with the transmission module.
Your Straightforward 30-Minute Installation Guide
For the Chevrolet Express and GMC Savana vans, this is one of the easier module replacements you can perform. No complex tools are required.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent electrical shorts and help reset the vehicle’s adaptive memory.
- Locate the TCM: On the 2006-2014 Express and Savana vans, the TCM is typically located in the engine compartment on the right-hand (passenger) side, often mounted near the firewall or inner fender.
- Disconnect and Remove: Carefully unplug the electrical connectors. Press the release tabs firmly. Then, unbolt the module from its mounting bracket. There are usually two or three small bolts holding it in place.
- Install the New Module: Bolt the new, pre-programmed TCM into the same location. Securely plug in the electrical connectors until they click into place.
- Final Steps: Reconnect the negative battery terminal. Start the vehicle and allow it to idle for a few minutes. If you have a basic scan tool, it’s good practice to clear any lingering fault codes from other modules. Test drive to confirm smooth shifting.
Verified Compatibility for Your GM Vehicle
This T42 TCM is a direct replacement for part number 24255280 and is interchangeable with many other service numbers. It is guaranteed to fit the following models (location in parentheses):
- EXPRESS 1500 VAN 06-14 Transmission; (RH engine compartment)
- SAVANA 1500 VAN 06-14 Transmission; (RH engine compartment)
- EXPRESS 2500 VAN 06-14 Transmission; (RH engine compartment)
- SAVANA 2500 VAN 06-14 Transmission; (RH engine compartment)
- EXPRESS 3500 VAN 06-14 Transmission; (RH engine compartment)
- SAVANA 3500 VAN 06-14 Transmission; (RH engine compartment)
- SILVERADO 1500 PICKUP 07 Transmission; (new style, smooth door skin), (next to battery)
- SIERRA 1500 PICKUP 07 Transmission; (new style, smooth door skin), (next to battery)
- SILVERADO 1500 PICKUP 08-13 Transmission; (next to battery), w/o hybrid option
- SIERRA 1500 PICKUP 08-13 Transmission; (next to battery), w/o hybrid option
- TAHOE 07-09 Transmission; (next to battery)
- YUKON 07-09 Transmission; (next to battery)
- …and many other GM cars, trucks, and SUVs from 2006-2014.
Don’t let a faulty module keep your van sidelined. This is the reliable, professional-grade fix for your 2006-2014 Express 1500 TCM issues. Order today and restore your transmission’s performance.
Do I need to program this module?
No. This module comes fully programmed to your vehicle’s VIN. It is ready for installation right out of the box, with no need for a trip to the dealership or any special programming tools.
Where is the TCM located on my 2008 Chevy Express 1500?
On the 2006-2014 Express and Savana vans, the Transmission Control Module is located in the engine bay on the passenger side (RH side) of the vehicle, typically mounted to the inner fender or firewall.
Will this part fix a P0700 trouble code?
A P0700 code is a general fault code indicating the TCM has detected a problem. While this module often resolves the root cause (internal TCM failure), it’s essential to ensure there are no other issues like bad wiring or faulty solenoids. However, if you’re experiencing shifting problems along with the code, a faulty TCM is the most likely culprit.
Is there a core charge for my old part?
No, there is no core charge for this part. You can keep or dispose of your old module without the hassle of returning it.
What is the warranty on this part?
This part is backed by our one-year, hassle-free warranty, giving you peace of mind and confidence in your repair.