Get Your H3 Back in Command
A faulty transmission control module can sideline even the toughest Hummer H3, turning your capable SUV into a frustrating, unreliable vehicle. If you’re experiencing harsh shifting, getting stuck in gear, or seeing persistent transmission warning lights, you’ve found the definitive solution. This OEM-quality T42 Transmission Control Module (TCM) is pre-programmed to your vehicle’s specific VIN, ensuring a seamless, plug-and-play installation that restores the rugged, dependable performance your H3 was built for.
Common H3 Transmission Problems & Your Solution
When the brain of your transmission fails, the symptoms are impossible to ignore. A failing TCM can cause drivability issues that range from annoying to dangerous. This module is the direct fix for these common problems:
- Erratic and Harsh Shifting: Abrupt, jerky gear changes that make driving uncomfortable.
- Limp Mode Activation: Your H3 gets stuck in a single gear (usually 2nd or 3rd) to prevent further damage.
- Delayed Engagement: A noticeable lag when shifting from Park into Drive or Reverse.
- Check Engine Light: Diagnostic Trouble Codes (DTCs) like P0700, P0750, or other solenoid-related faults pointing to the TCM.
- Poor Fuel Economy: Inefficient shifting patterns cause your engine to work harder and burn more fuel.
Installing this professionally programmed 2008-2010 Hummer H3 transmission control module resolves these issues at their source, restoring communication between your engine and transmission for smooth, precise operation.
Features & Tangible Benefits
- âś” VIN-Programmed for Your H3: Arrives ready for installation with the latest GM software loaded for your specific vehicle. This eliminates the need for expensive dealership programming and ensures perfect compatibility right out of the box.
- âś” Restores Peak Performance: By precisely managing shift points, line pressure, and torque converter lockup, this module brings back the smooth, responsive feel your transmission had when it was new.
- âś” Built to OEM Standards: Engineered to meet or exceed original equipment specifications, guaranteeing reliable performance and long-term durability, whether you’re on the highway or a back road.
- âś” No Core Charge Required: Keep your old part without the hassle or expense of a core deposit, simplifying your repair process.
- âś” This unit is backed by our one-year replacement warranty.
Expert Insight: Why Programming is Critical for Your H3
The 4L60E-family transmission in your Hummer H3 is a robust unit, but its performance is entirely dependent on the TCM. Unlike a generic, non-programmed module that can cause compatibility issues and persistent codes, our VIN-specific programming tailors the module’s software to your H3’s exact configuration—including tire size and gear ratios. This precision ensures not only smooth daily driving but also reliable performance under load, like towing or navigating tough terrain, preventing the transmission from hunting for gears or shifting poorly when you need it most.
Don’t let a faulty computer compromise your vehicle’s capability. By choosing the correct, pre-programmed 2008-2010 Hummer H3 transmission control module, you’re investing in a reliable and lasting repair. This part is also a direct replacement for service numbers 24242391, 24234503, 24252114, and many others, making it a versatile solution for your repair needs.
Frequently Asked Questions
Do I need to take my vehicle to the dealer after installation?
No. This 2008-2010 Hummer H3 transmission control module comes fully programmed to your vehicle’s VIN. It is designed for a plug-and-play installation, requiring no further programming or trips to the dealership.
Where is the TCM located on a 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.
Is this installation difficult to do myself?
For someone with basic mechanical skills, the installation is straightforward and usually takes less than 30 minutes. It involves disconnecting the battery, unplugging the electrical connectors from the old module, unbolting it, and then installing the new one in reverse order.
Will this fix a P0700 trouble code?
A P0700 code is a general transmission fault request from the TCM to the main engine computer. While this module often resolves the underlying issue causing the P0700 code (like a solenoid circuit fault), you should always diagnose any other related codes to ensure the TCM is the root cause.
What is a core charge?
A core charge is a deposit you pay until you return your old, faulty part. We do not require a core charge for this module, which saves you time and money. You can keep or dispose of your old part at your convenience.