Restore Peak Performance to Your Workhorse Van
If your 2006-2014 Chevrolet Express 1500 Van is suffering from erratic shifting, getting stuck in gear, or throwing transmission codes, the problem is very likely a failing Transmission Control Module (TCM). As the electronic brain of your automatic transmission (like the 4L60E or 4L80E), a faulty T42 TCM can bring your work to a grinding halt. This replacement module, part number 24239224, is the definitive solution. I’ve seen these modules fail countless times in my shop, and replacing them with a properly programmed unit is the key to a lasting repair.
This isn’t just a part; it’s a complete fix. We pre-program the module to your van’s specific Vehicle Identification Number (VIN) before it ships. This means it arrives ready for a true plug-and-play installation, eliminating the need for expensive dealership programming or specialized scan tools for setup. Get your van back on the road and working reliably with a module designed to meet or exceed original equipment standards.
Case Study: The Intermittent Fleet Van
A local delivery business brought in their 2011 Express 2500 with a frustrating problem. The van would randomly refuse to shift out of 2nd gear, but only after it had been running for over an hour on hot days. They had already replaced a shift solenoid with no luck. After a quick scan, I saw a generic P0700 code and a history of intermittent solenoid circuit faults. Experience told me this wasn’t a mechanical issue, but an electronic one. The original TCM was overheating and failing under load. We installed one of our VIN-programmed T42 modules in under 20 minutes. The van was back in service the same afternoon, and the fleet manager called a week later to say it was shifting better than ever, with no more issues. That’s the difference a reliable, pre-programmed module makes—it minimizes downtime and fixes the problem correctly the first time.
Is Your Express Van Showing These Warning Signs?
A failing TCM can manifest in several ways. If you’re experiencing any of the following, it’s time to consider a replacement:
- ✔ Harsh, slamming shifts or delayed gear engagement.
- ✔ The vehicle is stuck in “limp mode” (usually 2nd or 3rd gear).
- ✔ 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 Faults), or other transmission-related codes.
- ✔ Inconsistent or no shifting, either up or down.
- ✔ A noticeable decrease in fuel economy.
- ✔ Complete loss of communication with the TCM (no signal to scan tool).
Get Your Van Back to Work: A Simple Installation Guide
This is a repair you can confidently tackle yourself. For the Chevy Express and GMC Savana vans, the process is especially straightforward.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electronic component replacement.
- Locate the TCM: On the 2006-2014 Express 1500 Van, the TCM is conveniently located in the engine compartment on the right-hand (passenger) side, near the firewall.
- Disconnect and Remove: Carefully unplug the electrical connectors from the old module. Press the release tabs firmly to avoid breaking them. Then, unbolt the module from its mounting bracket.
- Install the New Module: Bolt the new, VIN-programmed TCM into place. Securely plug in the electrical connectors until they click, ensuring a solid connection.
- Reconnect and Verify: Reconnect the negative battery terminal. Start the vehicle and check for any warning lights. While our programming handles the setup, it’s good practice to use a basic OBD2 scan tool to clear any stored fault codes from the ECU.
Verified to Fit These GM Models
This T42 TCM is a direct replacement for a wide range of General Motors vehicles. Please confirm your model and location notes below. This module is interchangeable with part numbers including: 24252114, 24234503, 24230461, 24234274, 24239224, and others.
- AVALANCHE 1500 07-08 (next to battery)
- CANYON 08-12 (RH rear engine compartment)
- COBALT 06-10 (LH strut tower)
- COLORADO 08-12 (RH rear engine compartment)
- EXPRESS 1500 VAN 06-14 (RH engine compartment)
- EXPRESS 2500 VAN 06-14 (RH engine compartment)
- EXPRESS 3500 VAN 06-14 (RH engine compartment)
- HHR 06-11 (LH engine compartment)
- IMPALA 06-11 (lower air cleaner housing)
- SAVANA 1500 VAN 06-14 (RH engine compartment)
- SAVANA 2500 VAN 06-14 (RH engine compartment)
- SAVANA 3500 VAN 06-14 (RH engine compartment)
- SIERRA 1500 PICKUP 07-13 (next to battery)
- SIERRA 2500 PICKUP 07 (new style, 6.0L, next to battery)
- SILVERADO 1500 PICKUP 07-13 (next to battery)
- SILVERADO 2500 PICKUP 07 (new style, 6.0L, next to battery)
- SUBURBAN 1500 07-08 (next to battery)
- TAHOE 07-09 (next to battery)
- YUKON 07-09 (next to battery)
- YUKON XL 1500 07-08 (next to battery)
- …and many other Buick, Cadillac, GMC, Pontiac, Saab, and Saturn models. Please check the full fitment list for details.
Frequently Asked Questions
Frequently Asked Questions
What exactly does VIN programming do for my Express Van?
VIN programming loads your van’s specific software and calibrations onto the TCM. This ensures it communicates perfectly with your engine computer and transmission, providing correct shift points, torque converter lockup, and pressure control right out of the box.
Do I need to take my van to a dealer after installing this?
No. Because the module comes pre-programmed to your VIN, you can skip the expensive trip to the dealership for programming. It’s a true plug-and-play solution.
Where is the TCM located on a 2011 Express 1500 Van?
On most 2006-2014 Express and Savana vans, you’ll find the TCM in the engine bay on the passenger side, mounted near the firewall.
Will this programmed TCM fix a P0700 trouble code?
Yes. A P0700 code indicates a fault has been registered within the transmission control system. If the fault is caused by a failing TCM, replacing it with this module will resolve the root cause and allow the code to be cleared permanently.
Is there a core charge for my old part?
No, there is no core charge. You can keep your old module or recycle it locally without the hassle of shipping it back.
What kind of warranty comes with this part?
This module is backed by our one-year, hassle-free warranty, giving you peace of mind in your repair.