Get Your Work Van Back on the Job with a Reliable Transmission Fix
If your 2006-2014 Chevrolet Express 1500 Van is your livelihood, you can’t afford downtime caused by a faulty transmission control module (TCM). I’ve seen it countless times in my shop: a work van comes in stuck in limp mode, shifting erratically, or throwing transmission codes, bringing business to a grinding halt. The culprit is often a failed T42 TCM. This isn’t just an inconvenience; it’s lost time and money. That’s why we offer this direct-fit, VIN-programmed T42 Transmission Control Module, part number 24235754, as the definitive solution to get you back on the road quickly and reliably.
This module is the brain of your automatic transmission, controlling everything from shift points to torque converter lockup. When it fails, the symptoms can be dramatic and frustrating. Our replacement module is built to strict OEM specifications and comes pre-programmed with the latest GM software for your specific vehicle. This means no expensive trip to the dealership for programming—it’s a true plug-and-play solution designed for both professional mechanics and savvy DIYers.
From the Diagnostic Bay
A local contractor brought in his 2011 Express 2500, complaining of intermittent, bone-jarring shifts and the van occasionally refusing to shift out of 2nd gear. He’d already replaced a shift solenoid with no luck. A quick scan showed a P0700 (Transmission Control System Malfunction) and an intermittent solenoid circuit code. Experience pointed me straight to the TCM. Heat cycles and vibrations, especially in a hard-working van, can cause internal solder joints on the circuit board to fail. We swapped in one of our pre-programmed T42 modules, and the van was shifting like new in under an hour. He was back on his job site the same afternoon, a testament to how a reliable part can save a day’s work.
Is Your Express Van Showing These Red Flags?
- âś” Harsh, slamming shifts or unpredictable gear changes.
- âś” Vehicle is stuck in a single gear (often called “limp mode”).
- âś” Check Engine Light or Transmission Warning Light is illuminated.
- âś” Diagnostic Trouble Codes (DTCs) are present, such as P0700, P0750, P0753, or other solenoid-related faults.
- âś” Complete loss of communication with the transmission module.
- âś” Poor fuel economy and a feeling of sluggish performance.
- âś” Delayed engagement when shifting from Park to Drive or Reverse.
A Straightforward Guide to Installation
Replacing the 2006-2014 Express 1500 TCM is a job most people can handle in their own driveway in about 30 minutes. No specialized tools are required.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery to prevent electrical shorts and to help reset the vehicle’s computer systems.
- Locate the Module: On the Chevrolet Express and GMC Savana vans, the TCM is typically found in the engine compartment on the right-hand (passenger) side.
- 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: Bolt the new, pre-programmed TCM into place. Securely reconnect the electrical harnesses, ensuring they click into place.
- Final Steps: Reconnect the negative battery terminal. Start the vehicle and allow it to idle for a few minutes. While our programming resolves most issues, it’s good practice to use a basic OBD2 scan tool to clear any stored fault codes.
Verified Fitment For These GM Vehicles
This T42 TCM is a direct replacement for a wide array of General Motors vehicles, ensuring broad compatibility. While this page focuses on the 2006-2014 Express 1500 TCM, it also fits the following models. Please verify the location noted for your specific vehicle.
- Chevrolet: Avalanche 1500 (07-08), Cobalt (06-10), Colorado (08-12), Express 1500/2500/3500 Van (06-14), HHR (06-11), Impala (06-11), Monte Carlo (06-07), Silverado 1500/2500 (07-13), SSR (05-06), Tahoe (07-09), Trailblazer (06-09)
- GMC: Canyon (08-12), Envoy / Envoy XL (06-09), Savana 1500/2500/3500 Van (06-14), Sierra 1500/2500 (07-13), Yukon / Yukon XL 1500 (07-09)
- Buick: Allure (06-09), LaCrosse (06-09), Lucerne (06-11), Rainier (06-07), Rendezvous (06-07)
- Cadillac: DTS (06-11)
- Pontiac: G5 (07-10), G6 (06-10), Grand Prix (06-08), Pursuit (06)
- Saturn: Aura (07-09), Ion (06-07), Vue (07-10)
- Hummer: H3 (08-10)
- Saab: 9-7X (06-09)
Interchangeable Part Numbers: 24252114, 24234503, 24230461, 24234274, 24235340, 24235754, 24238856, 24239224, 24239926, 24240400, 24241806, 24243901, 24243921, 24255280, 24256960, 24235732, 24235753, 24240449, YNXS.
- Frequently Asked Questions
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What does “VIN Programmed” mean for me?
It means this module arrives ready to install. We flash it with your vehicle’s specific Vehicle Identification Number (VIN) and the latest GM software before shipping. This ensures it communicates perfectly with your van’s other computers, eliminating the need for a costly dealership visit for programming.
Do I need to send my old TCM back (core charge)?
No, there is absolutely no core charge. You can keep your old part, so you won’t have to worry about return shipping or waiting for a core refund.
Will this fix a P0700 check engine light code?
A P0700 code is a general fault code indicating the TCM has detected a problem. In many cases where the TCM itself has failed, replacing it with our programmed module will resolve the P0700 and any related transmission codes.
What tools do I need for installation?
For most applications, including the Express van, you will only need basic hand tools, such as a socket set or wrench to remove the mounting bolts. No special electronic equipment is required.
Is there a warranty included with this part?
Yes, this part comes with a one-year warranty, giving you peace of mind that you’re installing a quality, reliable component in your vehicle.