Restore Your H3’s Legendary Capability
Is your 2008-2010 Hummer H3’s transmission failing to live up to its rugged reputation? If you’re experiencing harsh shifting, getting stuck in limp mode, or seeing frustrating warning lights, a faulty Transmission Control Module (TCM) is the likely culprit. Don’t let a small electronic part sideline your powerful SUV. This direct-fit T42 TCM is the definitive solution, arriving pre-programmed to your vehicle’s specific VIN for a hassle-free, plug-and-play installation that gets you back on the road and trail with confidence.
Common H3 Transmission Problems & Your Solution
A failing TCM can manifest in various ways, turning a reliable vehicle into a source of stress. This module is engineered to permanently resolve these issues. If you’re noticing any of the symptoms below, this is the part you need:
- Abrupt, jerky, or delayed gear shifts
- The vehicle is stuck in a single gear (limp mode)
- Check Engine Light or Transmission Warning Light is on
- Diagnostic Trouble Codes (DTCs) such as P0700, P0750, or other solenoid-related faults
- A sudden drop in fuel economy
- Complete failure to shift gears
Installing our programmed 2008-2010 Hummer H3 transmission control module is the most effective way to restore your transmission’s original, smooth performance and clear these persistent error codes for good.
Features & Benefits
- ✔ Plug-and-Play VIN Programming: We flash the module with your Hummer’s unique VIN and the latest GM software before it ships. This eliminates the need for expensive dealership programming, saving you time and money.
- ✔ Restored Drivability: By precisely managing shift points and torque converter lockup, this module brings back the smooth, responsive feel you expect from your H3.
- ✔ Enhanced Reliability: Built to stringent OEM specifications, this TCM is designed to withstand the tough conditions your Hummer was built for, ensuring long-lasting performance.
- ✔ Clear stubborn DTCs: This is the direct fix for common transmission-related codes, helping you pass inspections and turn off that annoying check engine light.
- ✔ Direct-Fit Guarantee: This unit is a direct replacement for service number 24235732 and other interchangeable parts, ensuring a perfect fit and seamless communication with your vehicle’s systems.
- ✔ Warranty Protection: This unit is backed by our one-year replacement warranty.
Expert Insight: Why VIN-Specific Programming Matters
In a vehicle like the Hummer H3, the TCM doesn’t just change gears; it’s in constant communication with the Engine Control Module (ECM) and other vehicle systems. A generic, non-programmed module from a salvage yard can cause more problems than it solves—from incorrect shift timing to poor fuel efficiency and even internal transmission damage. Our process of programming this programmed 2008-2010 Hummer H3 transmission control module to your specific VIN ensures it has the exact software calibration your vehicle left the factory with, guaranteeing optimal performance, fuel economy, and system-wide harmony from the moment you plug it in.
Frequently Asked Questions
Do I need to take this part to a dealer for programming?
No. This is the biggest benefit of our service. We pre-program the module to your vehicle’s VIN before shipping. It will arrive ready to install, requiring no further programming or dealership intervention. Just plug it in and you’re ready to go.
Where is the TCM located on my Hummer H3?
On the 2008-2010 Hummer H3, the transmission control module is typically located in the engine compartment on the right-hand (passenger) side, towards the rear of the compartment.
Is this a difficult part to install myself?
For someone with basic mechanical skills, the installation is very straightforward. It typically involves disconnecting the battery, unplugging the electrical connectors from the old module, unbolting it, and then reversing the process. The entire job can usually be completed in under 30 minutes.
What is a core charge? Do I need to send my old part back?
There is no core charge for this part. You can keep your old module, saving you the time, cost, and hassle of shipping it back to us.
Will this fix a P0700 trouble code?
A P0700 code is a general fault code indicating the TCM has detected a problem. While this module often resolves the root cause of a P0700 code (such as an internal TCM failure), it’s important to have the vehicle scanned for other, more specific codes (e.g., solenoid codes) to confirm the TCM is the issue. In most cases, a faulty TCM is the primary culprit.