Restore Peak Performance to Your Hummer H3 Transmission
Is your 2008-2010 Hummer H3 suffering from erratic shifting, getting stuck in gear, or displaying a check engine light? These are classic signs of a failing Transmission Control Module (TCM). The TCM is the electronic brain of your automatic transmission, responsible for orchestrating smooth gear changes, managing torque converter lockup, and ensuring overall drivetrain efficiency. When it falters, your vehicle’s drivability and reliability are severely compromised. This genuine GM T42 TCM, service part number 24243901, is the definitive solution to restore your H3’s factory performance.
Our modules come expertly pre-programmed to your vehicle’s specific Vehicle Identification Number (VIN). This critical step eliminates the need for expensive dealership visits for programming and ensures a seamless, plug-and-play installation. Once installed, this module will communicate flawlessly with your H3’s Engine Control Module (ECM) and other vehicle systems, resolving common Diagnostic Trouble Codes (DTCs) and restoring the crisp, predictable shifting you expect.
From the Diagnostic Bay
We recently had a 2009 Hummer H3 come into the shop with a frustrated owner. The vehicle would intermittently slam into gear and sometimes refuse to shift past 2nd gear, forcing it into ‘limp mode.’ A scan revealed code P0700 (Transmission Control System Malfunction) and a handful of solenoid-specific codes. After confirming the wiring harness was intact, we identified a faulty internal processor in the original TCM. We installed one of our VIN-programmed T42 modules. The installation, located in the right rear of the engine compartment on the H3, took less than 20 minutes. After clearing the codes, a test drive confirmed the issue was completely resolved. The H3 shifted smoothly through all gears, and the owner was back on the road with confidence.
Your Direct Solution: The 2008-2010 Hummer H3 Transmission Module
Don’t let a faulty TCM sideline your capable SUV. This replacement T42 module is built to strict OEM standards, ensuring long-lasting durability and reliable operation whether you’re navigating city streets or tackling off-road trails. It directly manages the 4L60E family of transmissions found in your H3, correcting issues at their source for a permanent fix.
Symptoms of a Failing Hummer H3 TCM
- ✔ Harsh, delayed, or unpredictable gear shifts.
- ✔ Vehicle stuck in a single gear (limp mode).
- ✔ Illuminated Check Engine Light or Transmission Warning Light.
- ✔ Stored transmission-related fault codes such as P0700, P0750, P0753, P0758.
- ✔ Failure to engage Drive or Reverse.
- ✔ Poor fuel economy and a feeling of lost power.
- ✔ Intermittent loss of communication with the scan tool.
Key Features & Benefits
Choosing our pre-programmed Hummer H3 Transmission Module provides immediate advantages:
- VIN Programmed: Arrives ready for installation with the latest GM software matched to your VIN. No extra programming needed.
- OEM Quality: Engineered to meet or exceed original equipment specifications for fit, form, and function.
- Restores Performance: Eliminates shifting problems, improves fuel efficiency, and ensures proper transmission operation.
- Cost-Effective: A smart alternative to the high costs and scheduling hassles of a dealership repair.
- No Core Charge: Keep your old part without any additional fees or the hassle of returning a core.
This module is also a direct replacement for a wide range of GM part numbers, including 24252114, 24234503, 24230461, 24243901, and many more, making it a versatile solution for numerous GM trucks and SUVs from this era.
Frequently Asked Questions
Do I need to get this module programmed by a dealer?
No. We pre-program the module to your vehicle’s VIN before shipping. It arrives ready for a plug-and-play installation, saving you time and money.
Where is the TCM located on a 2008-2010 Hummer H3?
On the Hummer H3, the Transmission Control Module is typically located in the engine compartment, on the right-hand (passenger) side towards the rear.
Will this fix a P0700 trouble code?
A P0700 code is a general transmission fault code, indicating that the TCM has detected a problem. While a faulty TCM is a very common cause, this code can also be triggered by other issues. However, if you are experiencing other symptoms like poor shifting, this module is the most likely solution.
Is this a difficult part to install?
Installation is straightforward for someone with basic mechanical skills. It typically involves disconnecting the battery, unplugging the electrical connectors from the old TCM, unbolting it, and then installing the new one in reverse order. Most installations take under 30 minutes.
What is the warranty on this part?
This part comes with a comprehensive one-year warranty, giving you peace of mind with your purchase.