Get Your Workhorse Van Back on the Road with a Reliable Transmission Fix
If you rely on your 2006-2014 Chevrolet Express 2500 Van for work, you know that transmission trouble isn’t just an inconvenience—it’s a direct hit to your bottom line. When your van starts showing signs of harsh shifting, getting stuck in gear, or throwing transmission codes, the problem often points directly to a failing Transmission Control Module (TCM). Over my 20+ years in the garage, I’ve seen countless work vans sidelined by faulty electronics. This isn’t just a part; it’s the brain of your automatic transmission, and when it fails, your vehicle’s reliability disappears.
This T42 TCM is the definitive solution for restoring your transmission’s performance. It’s not just a replacement part; it’s a pre-programmed, plug-and-play fix that eliminates the need for expensive dealership visits and programming fees. We flash the module with your vehicle’s specific VIN and the latest GM software updates before it even ships. This ensures that once it’s installed, it communicates perfectly with your van’s powertrain, restoring the smooth, predictable shifting you depend on. This is the same high-quality component I’d install in a customer’s vehicle in my own shop.
From the Diagnostic Bay
Case Study: The Misleading Solenoid Code
A local contractor brought in his ’09 Express 2500, complaining of it being stuck in 3rd gear (limp mode) with a P0752 code for a stuck-on shift solenoid. He’d already replaced the solenoid himself, but the problem persisted. This is a classic scenario. While the code points to a solenoid, the TCM is the component that commands it. After a quick check of the wiring, we confirmed the TCM itself was faulty, failing to properly control the solenoid circuit. We installed a VIN-programmed T42 TCM, cleared the codes, and the van was shifting perfectly in under an hour. It’s a reminder that the diagnostic code often points to the symptom, not the root cause, and a faulty TCM can mimic many other transmission failures.
Is Your Van Showing These Transmission Warning Signs?
- ✔️ Harsh, slamming shifts or erratic gear changes.
- ✔️ 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 on with codes like P0700, P0750, P0752, or other solenoid-related DTCs.
- ✔️ Delayed engagement when shifting from Park to Drive or Reverse.
- ✔️ Poor acceleration and a noticeable drop in fuel economy.
- ✔️ Complete loss of communication with the transmission module.
A Straightforward Guide to Your 2006-2014 Express 2500 TCM Installation
Replacing the TCM on your Express Van is a job most DIYers or any professional mechanic can handle in about 30 minutes with basic tools. On these vans, the module is conveniently located in the engine compartment on the right-hand (passenger) side, making access easy.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts and to help reset the system.
- Locate the TCM: Open the hood and find the module on the RH side of the engine bay. It will have several large electrical connectors attached.
- Disconnect and Remove: Carefully unplug the electrical connectors. Note the locking tabs to avoid damaging them. Then, unbolt the module from its mounting bracket.
- Install the New Module: Bolt the new, pre-programmed TCM into place and securely reconnect the electrical harnesses. You should hear a click as they lock in.
- Final Steps: Reconnect the battery terminal. While our programming handles the critical setup, it’s best practice to use a basic OBD2 scan tool to clear any stored fault codes from the vehicle’s memory. Start the engine and test drive to confirm smooth shifting.
Verified Vehicle Compatibility
This T42 TCM is a direct-fit replacement for a wide range of General Motors vehicles. While this page focuses on the 2006-2014 Express 2500 TCM, it is also compatible with the following models. Please verify your vehicle’s location, as it can vary.
- 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), Malibu (06-10)
- 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), Rendezvous (06-07), Rainier (06-07)
- Pontiac: G6 (06-10), Grand Prix (06-08), G5 (07-10), Pursuit (06), Montana (06-09)
- Cadillac: DTS (06-11)
- Saturn: Vue (07-10), Aura (07-09), Ion (06-07)
- Hummer: H3 (08-10)
- Saab: 9-7X (06-09)
Frequently Asked Questions
Do I need to take my van to the dealer after installation?
No. This module comes fully programmed to your vehicle’s VIN. The service is included in the price, saving you time and money. It’s ready for installation right out of the box.
Is this compatible with part number 24230461?
Yes. This T42 TCM is a direct replacement and is interchangeable with part number 24230461, as well as 24252114, 24234503, and many others listed in the product details.
What if I install it and still have problems?
While this part fixes the vast majority of electronic transmission issues, we recommend a proper diagnosis to rule out mechanical failures or wiring problems. Our part is backed by a one-year warranty for your peace of mind.
Do I need to send my old TCM back?
No, there is no core charge for this part. You can keep your old module or dispose of it without any hassle.
Will this fix a P0700 trouble code?
A P0700 is a generic code indicating the TCM has detected a fault. Often, replacing a faulty TCM will clear the P0700 along with the specific underlying codes (like solenoid faults). This module is designed to resolve those internal electronic failures.