Tired of Transmission Headaches in Your GM Truck?
If your 2007 Silverado 2500 is suffering from harsh shifts, getting stuck in gear, or throwing transmission codes, the problem is often a faulty Transmission Control Module (TCM). As the brain of your automatic transmission, a failing T42 TCM can make your reliable truck feel unpredictable and unsafe. This replacement module, part number 24241806, is the definitive solution, arriving pre-programmed to your truck’s specific VIN for a true plug-and-play repair that gets you back on the road without a mandatory trip to the dealership.
A Technician’s Notebook: The Limp Mode Silverado
A customer brought in a 2007 Silverado 2500 HD that was stuck in what he called ‘crawler gear’—it was actually limp mode, stuck in 3rd. The check engine light was on, and my scan tool pulled a P0700 (Transmission Control System Malfunction) and a handful of solenoid circuit codes. In my 20+ years, I’ve seen this hundreds of times. Heat and vibration from the engine bay cook the delicate electronics inside these modules. We confirmed power and ground were good, pointing straight to a failed TCM. Instead of a costly dealer visit, we installed one of our VIN-programmed units. After a 15-minute install and clearing the codes, the truck was shifting perfectly through all gears. This is the exact fix for that common scenario.
Is Your Truck Showing These Symptoms?
A failing TCM isn’t subtle. If you’re experiencing any of these issues, it’s time to inspect your module. A new 2007 Silverado 2500 TCM is often the most direct path to a lasting fix.
- ✔ Harsh, banging shifts or delayed gear engagement.
- ✔ Vehicle is stuck in one gear (limp mode) and will not shift up or down.
- ✔ Check Engine Light or Transmission Warning Light is illuminated.
- ✔ Diagnostic Trouble Codes (DTCs) are present, such as P0700, P0750, P0753, P0758, or other solenoid-related faults.
- ✔ A noticeable drop in fuel economy due to inefficient shifting.
- ✔ Complete loss of communication with the transmission module.
A Straightforward Guide to Installation
One of the best features of this module is its simple installation. You don’t need a lift or specialized transmission tools. For most Silverado and Sierra trucks, the process takes less than 30 minutes.
- Safety First: Disconnect the negative terminal from your truck’s battery to prevent any electrical shorts and help reset the system.
- Locate the TCM: On your 2007 Silverado 2500, the TCM is typically mounted in the engine compartment, right next to the battery.
- Disconnect and Remove: Carefully unplug the electrical connectors. They have locking tabs, so be gentle. Then, unbolt the module from its mounting bracket.
- Install the New Module: Bolt the new VIN-programmed TCM into place and securely plug in the electrical connectors until they click.
- Reconnect and Verify: Reconnect the battery terminal. Start the vehicle and ensure the check engine light is off. Use a basic scan tool to clear any lingering fault codes from memory.
Verified Vehicle Compatibility
This T42 TCM is a direct replacement for part number 24241806 and is interchangeable with other service numbers including 24252114, 24234503, and 24240400. It fits a wide range of General Motors vehicles equipped with 4-speed automatic transmissions (4L60E, 4L65E, 4L70E, 4L80E). While this page focuses on the 2007 Silverado 2500 TCM, it also fits:
- Chevrolet: Silverado 1500/2500, Tahoe, Suburban, Avalanche, Express Van, Cobalt, HHR, Impala, Monte Carlo, Colorado
- GMC: Sierra 1500/2500, Yukon, Savana Van, Envoy, Canyon
- Cadillac: DTS
- Buick: LaCrosse, Lucerne, Rainier, Allure
- Pontiac: G5, G6, Grand Prix
- Hummer: H3
- Saturn: Vue, Aura, Ion
- Saab: 9-7X
Please verify your specific model and year using the fitment tool or by contacting our expert support team.
What does ‘VIN Programmed’ actually mean?
What does ‘VIN Programmed’ actually mean?
It means we load your vehicle’s unique 17-digit Vehicle Identification Number (VIN) and the latest GM software onto the module before we ship it. This ensures it communicates perfectly with your truck’s engine computer and other systems, just like a part from the dealer, but without the extra programming fee.
Do I need to send my old TCM back?
No. There is no core charge or need to return your old part. You can dispose of it or keep it, making the process faster and more convenient for you.
Will this fix a P0700 code?
A P0700 code is a general fault code indicating the TCM has detected a problem. While this module will often resolve the issue (especially if other solenoid codes are present), you should ensure the transmission wiring and solenoids are in good condition. In the vast majority of cases I’ve diagnosed, a faulty TCM is the root cause.
Is this a difficult part for a DIYer to install?
Not at all. This is one of the easier electronic components to replace. It’s located in an accessible spot in the engine bay and requires only basic hand tools. The entire job can typically be completed in under half an hour.
What is the warranty on this part?
This module comes with a one-year, unlimited mileage warranty, giving you confidence and peace of mind in your repair.