Restore Your Truck’s Shifting Performance
If your 2007 Chevrolet Silverado 2500 is suffering from harsh shifts, getting stuck in gear, or throwing transmission codes, the culprit is often a failing Transmission Control Module (TCM). As the electronic brain of your automatic transmission, the TCM is responsible for every gear change, torque converter lockup, and diagnostic check. When it fails, it can make your reliable workhorse feel unpredictable and unsafe. This replacement T42 TCM, part number 24240400, is the definitive solution to restore your truck’s factory performance and get you back on the road with confidence.
Over my 20 years in diagnostics, I’ve seen countless GM trucks and SUVs come into the bay with transmission issues that seemed complex. More often than not, the root cause was a faulty TCM. This module is the central command for transmissions like the 4L60E, 4L70E, and the heavy-duty 4L80E found in your Silverado 2500. We solve the problem by providing a high-quality replacement that is pre-programmed to your vehicle’s specific VIN, eliminating the need for expensive dealership visits and programming fees.
Case Study: A Tricky Diagnosis
A customer brought in a 2007 Sierra 2500 with a 6.0L—nearly identical to the Silverado—with a complaint of intermittent, hard 1-2 shifts and occasionally getting stuck in 3rd gear (limp mode) after long drives. No other shop could pinpoint the issue because it only happened when the engine bay was hot. After checking the wiring and solenoids, we focused on the TCM. Heat soak can cause internal electronic components to fail intermittently. We swapped in a VIN-programmed module, and the problem was solved instantly. This is a classic failure mode for these T42 modules, and a direct replacement is the most reliable fix.
Is Your Truck Showing These Telltale Signs?
- ✔ Harsh, slamming, or erratic gear shifts.
- ✔ 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, 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 Installation
For the 2007 Silverado 2500, this is a job most DIYers can handle in under 30 minutes with basic tools. The module is conveniently located in the engine compartment right next to the battery.
- Safety First: Disconnect the negative terminal from your truck’s battery to prevent electrical shorts and help reset the system.
- Locate the TCM: On your Silverado, find the module mounted next to the battery. It will have several large electrical connectors.
- Disconnect and Remove: Carefully unplug the electrical connectors. Note the tab locations to avoid damage. Then, unbolt the module from its mounting bracket.
- Install the New Module: Bolt the new, pre-programmed TCM into place. Securely plug in the electrical connectors until they click.
- Reconnect and Verify: Reconnect the negative battery terminal. Start the vehicle and check for any warning lights. Use a basic OBD2 scanner to clear any stored fault codes if necessary.
Verified Vehicle Compatibility
This T42 Transmission Control Module is a direct replacement for a wide range of General Motors vehicles equipped with 4-speed automatic transmissions. While this page focuses on the 2007 Silverado 2500 TCM, it also fits models like the Sierra, Tahoe, Yukon, Express, Savana, and many more from 2006-2014. It is interchangeable with part numbers: 24252114, 24234503, 24230461, 24234274, 24235340, 24235754, 24238856, 24239224, 24239926, 24240400, 24241806, 24243901, 24243921, 24252114, 24255280, 24256960, 24235732, 24235753, and 24240449. Always verify fitment for your specific vehicle before ordering.
Frequently Asked Questions
Do I need to take this part to a dealer for programming?
No. This module comes fully pre-programmed to your vehicle’s VIN. It is a true plug-and-play solution, saving you hundreds of dollars in dealership fees.
Is this a difficult part to install myself?
Not at all. For most vehicles, including the Silverado 2500, the TCM is easily accessible in the engine bay. With basic hand tools, the replacement typically takes less than 30 minutes.
Will this fix a P0700 trouble code?
A P0700 code is a general transmission fault request from the TCM to the Engine Control Module (ECM) to turn on the check engine light. While this module often resolves the underlying issue causing the P0700, you should scan for more specific P-codes (like P0751, P0756, etc.) to confirm the diagnosis.
What is the warranty on this module?
This module is backed by our one-year warranty, giving you peace of mind and assurance in the quality and reliability of your repair.
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 at your convenience, making the process simple and hassle-free.