Restore Peak Transmission Performance in Your GM Truck or SUV
Is your 2007-2013 GMC Sierra 1500, Chevrolet Silverado, or other GM vehicle suffering from erratic shifting, delayed gear engagement, or a frustrating ‘limp mode’ condition? These are classic signs of a failing Transmission Control Module (TCM). The TCM is the electronic brain of your automatic transmission, responsible for orchestrating every gear change, managing torque converter lockup, and monitoring system health. When it fails, it can leave you with an unreliable and poorly performing vehicle. This genuine quality GM T42 Transmission Control Module, service part number 24241806, is the definitive solution to restore your transmission’s smooth, decisive operation.
From the Diagnostic Bay
We had a 2008 Silverado 1500 come into the shop that was permanently stuck in third gear. The check engine light was on, and the driver was frustrated with the lack of power and terrible fuel economy. A quick scan showed a P0700 code, pointing to a general transmission fault. After checking the basics, we identified the TCM as the culprit. Instead of a costly trip to the dealer for a new module and programming, the owner opted for one of our pre-programmed units. Within 30 minutes, the new module was installed, codes were cleared, and the truck was shifting perfectly through all gears on the test drive. It’s a common failure, but with a VIN-programmed part, it’s a remarkably straightforward fix.
Identifying a Faulty Sierra 1500 Transmission Control Module
A failing TCM can manifest in various ways, often starting as intermittent issues before becoming a constant problem. If you’re experiencing any of the following symptoms, your T42 module is the most likely cause. Timely replacement can prevent further damage to your transmission’s mechanical components.
Common Symptoms of a Failing T42 TCM
- ✔ Harsh, slamming, or erratic gear shifts.
- ✔ The vehicle gets stuck in a single gear (limp mode), often 2nd or 3rd.
- ✔ Check Engine Light or Transmission Warning Light is illuminated.
- ✔ Diagnostic Trouble Codes (DTCs) such as P0700, P0750, or other solenoid-related codes are present.
- ✔ Delayed engagement when shifting from Park to Drive or Reverse.
- ✔ Failure to upshift or downshift correctly.
- ✔ A noticeable decrease in fuel efficiency.
- ✔ Complete loss of communication with the transmission module.
The Plug-and-Play Advantage: VIN Programming Included
The biggest hurdle in replacing a modern electronic module is the need for expensive dealership programming. We eliminate that step entirely. Before shipping, we program this T42 TCM with your vehicle’s specific Vehicle Identification Number (VIN) and load the latest GM software updates. This ensures that the module is a true plug-and-play component. It will communicate seamlessly with your vehicle’s Engine Control Module (ECM) and other systems right out of the box, restoring original functionality without any additional setup. This process ensures optimal shift points, fuel economy, and transmission longevity.
This module is a direct replacement for a wide range of original part numbers, including 24252114, 24234503, 24230461, 24234274, 24241806, and more, making it a versatile solution for numerous GM models equipped with 4-speed automatic transmissions like the 4L60E, 4L65E, 4L70E, and 4L80E.
Frequently Asked Questions
What is VIN programming and why do I need it?
VIN programming loads your vehicle’s specific software and calibration files onto the module. This is critical for the Transmission Control Module to communicate correctly with the engine and other vehicle systems. Without it, the transmission will not function properly. Our service handles this for you, so the part is ready for installation upon arrival.
Is this a difficult part to install myself?
For most DIY mechanics, this is a very manageable job. The TCM is typically located in the engine bay (e.g., next to the battery, on a strut tower, or under the airbox). The process involves disconnecting the battery, unplugging the electrical connectors, unbolting the old module, and installing the new one. The entire process often takes less than 30 minutes.
Will this TCM fix a P0700 trouble code?
A P0700 code is a general fault code indicating that the TCM has detected a problem and has requested the Check Engine Light to be turned on. While this module replacement often resolves the root cause that triggered the P0700, it’s essential to have the vehicle scanned for other specific transmission codes (e.g., P0751, P0756) to confirm the diagnosis.
What is the warranty on this module?
This module comes with a one-year, unlimited mileage warranty, giving you peace of mind and confidence in the quality and durability of your repair.
Do I need to return my old TCM?
No, there is no core charge for this part. You can keep your old module, which saves you the time, cost, and hassle of shipping a core back.