Fix Your Silverado’s Shifting Problems for Good
If you’re dealing with the frustration of a 2007-2013 Silverado 1500 that shifts harshly, gets stuck in gear, or throws transmission codes, you’ve come to the right place. As a technician with over two decades of experience, I’ve seen countless trucks sidelined by a faulty Transmission Control Module (TCM). This isn’t just an annoyance; it’s a critical failure that can affect your truck’s performance, fuel economy, and safety. This T42 series TCM, part number 24238856, is the definitive solution, arriving at your door pre-programmed to your truck’s specific VIN. That means no expensive trips to the dealership for programming—just a straightforward installation to get you back on the road with confidence.
Case Study: A Tricky Diagnosis
I remember a 2011 Silverado 1500 that came into my shop with a maddeningly intermittent problem. The owner said it would randomly refuse to shift out of 3rd gear (limp mode) but would be fine after restarting the engine. He’d already replaced a couple of shift solenoids with no luck. We hooked up the scanner and found a generic P0700 code, but nothing specific. After monitoring the live data, we noticed the TCM would momentarily lose communication right before the fault occurred. This pointed directly to an internal failure in the module itself. We installed a VIN-programmed 2007-2013 Silverado 1500 TCM, and the problem was solved instantly. It’s a classic example of how a failing TCM can mimic other transmission issues.
Is Your Silverado Showing These Telltale Signs?
A failing TCM can manifest in several ways. If you’re experiencing any of the following, it’s highly likely your module is the culprit:
- ✔ Harsh, slamming shifts or delayed gear engagement.
- ✔ The vehicle is stuck in a single gear, often called “limp mode.”
- ✔ Check Engine Light or Transmission Warning Light is illuminated.
- ✔ Diagnostic Trouble Codes (DTCs) are present, such as P0700 (Transmission Control System Malfunction), P0750-P0758 (Shift Solenoid errors), or communication codes.
- ✔ Complete loss of shifting capability or erratic gear hunting.
- ✔ A noticeable drop in fuel efficiency.
A Straightforward Guide to Installation
One of the best features of this module is its simple, DIY-friendly installation. For your 2007-2013 Silverado 1500 TCM, the process is quick and requires basic hand tools.
- Safety First: Always disconnect the negative terminal from your truck’s battery to prevent electrical shorts and help reset the vehicle’s electronic systems.
- Locate the TCM: On most 2007-2013 Silverado 1500 models, you’ll find the TCM located in the engine bay, right next to the battery. It’s a silver box with electrical connectors.
- Disconnect and Remove: Carefully unplug the wiring harnesses. They have locking tabs that need to be released. Once unplugged, unbolt the old module from its mounting bracket.
- Install the New Module: Bolt the new, pre-programmed TCM into place. Securely plug in the wiring harnesses, ensuring they click and lock into position.
- Reconnect and Verify: Reconnect the negative battery terminal. Start the engine and allow it to idle for a few minutes. If you have a basic scan tool, it’s good practice to clear any stored DTCs. Take the truck for a test drive to confirm smooth shifting has been restored.
Verified Vehicle Compatibility
This T42 TCM is a direct-fit replacement for a wide range of General Motors vehicles equipped with 4-speed automatic transmissions (4L60E, 4L65E, 4L70E, etc.). While this page focuses on the Silverado, it also fits:
- Chevrolet: Silverado (07-13), Tahoe (07-09), Suburban (07-08), Avalanche (07-08), Express Van (06-14), Impala (06-11), Cobalt (06-10), HHR (06-11), Colorado (08-12)
- GMC: Sierra (07-13), Yukon (07-09), Savana Van (06-14), Envoy (06-09), Canyon (08-12)
- Cadillac: DTS (06-11)
- Buick: LaCrosse (06-09), Lucerne (06-11), Rainier (06-07)
- Pontiac: G6 (06-10), Grand Prix (06-08)
- Saturn: Vue (07-10), Aura (07-09), Ion (06-07)
- Hummer: H3 (08-10)
- Saab: 9-7X (06-09)
This module interchanges with part numbers: 24252114, 24234503, 24230461, 24234274, 24238856, 24239224, 24256960, and more.
How does the VIN programming work?
You provide us with your vehicle’s 17-digit VIN during checkout. We use this to load the latest, most compatible GM software directly onto the module. This ensures it communicates perfectly with your truck’s engine computer and other systems right out of the box.
Do I need to take this to a dealer after installation?
No. The pre-programming process eliminates the need for any additional dealership flashing or setup. This saves you time and hundreds of dollars in labor fees. It’s a true plug-and-play solution.
Is there a core charge for my old part?
No, there is no core charge. You can keep your old module or dispose of it without the hassle of shipping it back to us.
What if this doesn’t fix my problem?
While this TCM is a common fix for the symptoms listed, proper diagnosis is key. We recommend confirming the TCM is the fault, often by checking for specific TCM-related trouble codes. All our parts are backed by a one-year warranty against defects.
Will this fix a P0700 code?
A P0700 code is a general code indicating the TCM has detected a fault. Often, a failing TCM is the root cause. Replacing it can clear the P0700 and any related specific codes (like for solenoids) that were being triggered by the faulty module.