If you’re dealing with a 2007-2013 Silverado 1500 that’s shifting harshly, getting stuck in gear, or throwing transmission codes, you’re not alone. After more than two decades in the garage, I’ve seen countless GM trucks with these exact issues. More often than not, the culprit isn’t a catastrophic mechanical failure inside the transmission; it’s a faulty Transmission Control Module (TCM). This electronic brain is responsible for every shift, and when it starts to fail, it can make your reliable truck feel unpredictable and unsafe.
This is the definitive fix. We offer a direct-replacement T42 Transmission Control Module, part number 24235754, that comes fully pre-programmed to your truck’s specific Vehicle Identification Number (VIN). This means you can skip the expensive trip to the dealership for programming. It’s a true plug-and-play solution designed to restore the smooth, precise shifting you expect from your Silverado. It correctly manages shift points, torque converter lockup, and line pressure, resolving common electronic transmission faults for good.
Common Signs of a Failing GM T42 TCM
- ✔️ Harsh, delayed, or erratic gear shifts that bang into place.
- ✔️ The vehicle enters ‘limp mode,’ often stuck in 2nd or 3rd gear.
- ✔️ An illuminated Check Engine Light or Transmission Warning Light on the dash.
- ✔️ Diagnostic Trouble Codes (DTCs) are stored, such as the generic P0700 (Transmission Control System Malfunction) or specific solenoid codes like P0750.
- ✔️ A noticeable decrease in fuel economy due to inefficient shifting.
- ✔️ Complete loss of communication with the module, leading to a no-shift condition.
A Technician’s Notebook: The Intermittent Shifting Mystery
A customer brought in his ’09 Silverado 1500 with a frustrating problem: it would shift perfectly for days, then suddenly start slamming into gear and get stuck in 3rd. He’d already replaced a shift solenoid with no luck. After connecting my scan tool, I saw intermittent communication drops with the TCM. Heat soak in the engine bay was causing the module’s internal circuits to fail unpredictably. Instead of a costly diagnostic chase, we installed one of our VIN-programmed TCMs. The total install time was under 20 minutes right in the bay. The customer drove away with a truck that shifted like new, saving him hundreds compared to a dealership visit.
Your Straightforward Installation Guide
Replacing the 2007-2013 Silverado 1500 TCM is a job most DIYers can handle in their own driveway. For these specific trucks, the module is conveniently located right next to the battery in the engine compartment.
- Safety First: Always disconnect the negative terminal from your truck’s battery to prevent any electrical shorts and to help reset the vehicle’s electronic systems.
- Locate the Module: Open the hood and find the TCM mounted on a bracket next to the battery.
- Disconnect and Remove: Carefully unclip the electrical connectors. Be gentle with the locking tabs. Then, unbolt the module from its mounting bracket.
- Install the New TCM: Mount the new, pre-programmed module onto the bracket and securely reconnect the electrical harnesses. You should hear a ‘click’ as they lock into place.
- Final Steps: Reconnect the negative battery terminal. While the module is plug-and-play, it’s best practice to use a basic OBD-II scan tool to clear any lingering fault codes from the system’s memory. Start the truck and enjoy smooth shifting!
Verified Vehicle Compatibility
This module, also known by service numbers like 24242391, 24234503, and 24252114, is a direct fit for a wide range of General Motors vehicles equipped with 4-speed automatic transmissions (4L60E, 4L65E, 4L70E). While this listing focuses on the 2007-2013 Silverado 1500 TCM, it is also compatible with the following models:
- Chevrolet: Silverado 1500/2500 (07-13), Tahoe (07-09), Suburban 1500 (07-08), Avalanche 1500 (07-08), Express/Savana Vans (06-14), Impala (06-11), Monte Carlo (06-07), HHR (06-11), Cobalt (06-10), Colorado (08-12), SSR (05-06)
- GMC: Sierra 1500/2500 (07-13), Yukon/Yukon XL (07-09), Savana Vans (06-14), Canyon (08-12), Envoy (06-09)
- Buick: LaCrosse (06-09), Lucerne (06-11), Allure (06-09), Rainier (06-07), Rendezvous (06-07), Terraza (06-07)
- Cadillac: DTS (06-11)
- Pontiac: G6 (06-10), G5 (07-10), Grand Prix (06-08), Pursuit (06)
- Saturn: Vue (07-10), Aura (07-09), Ion (06-07)
- Hummer: H3 (08-10)
- Saab: 9-7X (06-09)