Get Your Silverado Shifting Like New Again
If your 2007-2013 Silverado 1500 is suffering from erratic shifting, getting stuck in gear, or throwing transmission codes, the problem is very likely a failing Transmission Control Module (TCM). As a technician with over 20 years of experience, I’ve seen these T42 modules cause headaches for countless truck owners. Heat cycles and vibrations eventually take their toll on the internal electronics, leading to frustrating and unpredictable performance. This isn’t just an annoyance; it’s a reliability issue that can leave you stranded. This replacement T42 TCM, part number 24230461, is the definitive solution to restore your truck’s dependable performance.
The biggest advantage we offer is the pre-programming. We flash the module with the latest GM software and calibrate it specifically to your truck’s Vehicle Identification Number (VIN) before it ships. This means you can skip the expensive trip to the dealership for programming. It arrives at your door ready for a true plug-and-play installation, making it a perfect job for a DIY mechanic or a time-saver for a professional shop. By replacing your faulty unit, you’re not just fixing a symptom; you’re restoring the precise electronic control over your transmission’s clutches, solenoids, and torque converter, ensuring smoother shifts, better fuel economy, and peace of mind.
Case Study: The Ghost in the Transmission
A customer brought in his ’09 Sierra 1500 with a perplexing issue: it would randomly refuse to shift out of 3rd gear, but only after driving for 30+ minutes. There were no consistent codes, just a general P0700 (Transmission Control System Malfunction) that would pop up occasionally. We checked the fluid, wiring, and solenoids—all fine. Based on my experience with hundreds of these GM trucks, I suspected an intermittent thermal failure inside the TCM. We installed one of our VIN-programmed modules, and the problem vanished instantly. The heat was causing a micro-fracture on the circuit board to expand, breaking a connection. This is a classic failure mode that a simple code scan won’t always pinpoint.
Is Your Silverado Showing These Telltale Signs?
A failing TCM doesn’t always mean a complete transmission failure. Often, the signs are electronic. If your truck is experiencing any of the following, a new TCM is likely the fix you need.
- âś” Harsh, banging shifts or delayed gear engagement.
- âś” The vehicle is stuck in “limp mode” (usually locked in 2nd or 3rd gear).
- âś” Check Engine Light or Transmission Warning Light is illuminated.
- âś” Diagnostic Trouble Codes (DTCs) are present, such as P0700, P0750-P0758 (solenoid circuit faults), or other transmission-related codes.
- âś” Failure to upshift or downshift properly as you accelerate or decelerate.
- âś” A noticeable drop in fuel efficiency or signs of the transmission overheating.
Get Your Truck Shifting Smoothly: A 30-Minute Install Guide
This is a straightforward repair that most owners can complete with basic hand tools. On the 2007-2013 Silverado 1500, the TCM is conveniently located in the engine bay.
- Safety First: Disconnect the negative terminal from your truck’s battery to prevent any electrical shorts and to help reset the vehicle’s computer systems.
- Locate the Module: Open the hood and find the TCM. On most of these trucks, it’s mounted right next to the battery. It’s a silver box with several large electrical connectors.
- Disconnect and Remove: Carefully unplug the wiring harness connectors. They have locking tabs that need to be released. Then, unbolt the module from its mounting bracket.
- Install the New TCM: Bolt the new, pre-programmed module into place. Securely plug in the wiring harnesses, making sure they click and lock into position.
- Final Steps: Reconnect the negative battery terminal. While the module is plug-and-play, it’s always good practice to use a basic OBD2 scan tool to clear any stored fault codes from the system’s memory. Start the truck and enjoy smooth, crisp shifting.
Verified Fitment for Your GM Vehicle
This T42 TCM is a direct replacement for a wide range of General Motors vehicles equipped with 4-speed automatic transmissions like the 4L60E, 4L65E, and 4L70E. While this page focuses on the 2007-2013 Silverado 1500 TCM, it is also compatible with the following models. Please verify the location noted for your specific vehicle.
- Chevrolet Silverado/GMC Sierra 1500 (07-13): Located next to the battery (for new body style ’07).
- Chevrolet Tahoe/Suburban & GMC Yukon/Yukon XL (07-09): Located next to the battery.
- Chevrolet Express/GMC Savana Vans (06-14): Located in the RH engine compartment.
- Chevrolet Impala/Monte Carlo (06-11): Found under the lower air cleaner housing.
- Cadillac DTS (06-11): Located in the RH front engine compartment.
- Hummer H3 (08-10): Found in the RH rear engine compartment.
- Chevrolet Colorado/GMC Canyon (08-12): Located in the RH rear engine compartment.
- … and many other GM models including the Cobalt, HHR, G6, LaCrosse, Lucerne, and more. Replaces part numbers 24252114, 24234503, 24230461, 24234274, 24235340, and others.
Frequently Asked Questions
What does ‘VIN Programmed’ actually mean for me?
It means the module arrives ready for installation with no extra steps. We load the correct software for your truck’s specific options and transmission calibration using your VIN. This allows you to avoid a costly and time-consuming visit to a dealership for programming.
Will this fix a P0700 transmission code on my Silverado?
A P0700 code is a general fault code indicating the TCM has detected a problem. While this module often resolves the root cause (like an internal solenoid driver failure that triggers the P0700), you should scan for more specific codes (e.g., P0753) to confirm. In many cases, a faulty TCM is the culprit.
Where is the TCM located on my 2011 Silverado 1500?
On a 2011 Silverado 1500, as with most trucks in this generation, the Transmission Control Module is mounted in the engine compartment, right next to the battery on the driver’s side.
Do I need to send my old part back for a core charge?
No. We do not require a core return for this part. You can keep or dispose of your old module without any hassle or extra charges.
Is this the correct part for my 4L60E transmission?
Yes, this T42 TCM is the correct controller for vehicles equipped with the 4L60E, as well as the related 4L65E and 4L70E 4-speed automatic transmissions used across the GM lineup during these years.