Restore Your Hummer’s Legendary Capability
Is your 2008-2010 Hummer H3 suffering from erratic shifting, getting stuck in gear, or throwing transmission codes? A faulty Transmission Control Module (TCM) can sideline even the toughest vehicle, turning a capable SUV into a source of frustration. This pre-programmed T42 TCM is the definitive solution to restore the smooth, reliable performance you expect from your H3. Engineered to OEM specifications and programmed specifically to your vehicle’s VIN, it eliminates the guesswork and costly dealership visits, getting you back on the road—or the trail—with confidence.
Common Symptoms & Your Solution
If you’re experiencing any of the following issues, a failing TCM is the likely culprit. This module is designed to be the direct-fit solution for these problems:
- Harsh, delayed, or unpredictable gear shifts
- Vehicle entering “limp mode” (stuck in 2nd or 3rd gear)
- Active Check Engine Light or transmission warning light
- Diagnostic Trouble Codes (DTCs) such as P0700, P0750, or other solenoid-related faults
- Failure to upshift or downshift properly
- A sudden drop in fuel economy
Installing this professionally programmed 2008-2010 Hummer H3 transmission control module 24238856 directly addresses the electronic brain of your transmission, correcting these faults and restoring precise hydraulic control for dependable operation.
Features & Benefits
- ✔ Plug & Play Installation: This module arrives pre-programmed to your Hummer H3’s specific VIN. No extra trips to the dealer for expensive programming are required.
- ✔ Restored Drivability: Eliminates harsh shifting and gear-hunting by ensuring precise communication between the engine and transmission, just like it did from the factory.
- ✔ Clear Fault Codes: The correct programming helps resolve persistent DTCs related to transmission solenoids and sensors, allowing you to finally turn off that check engine light.
- ✔ OEM-Standard Quality: Built to meet or exceed original equipment standards for durability and performance, ensuring it can handle the demands of your H3.
- ✔ Cost-Effective Repair: Save hundreds of dollars compared to dealership prices for a new part and programming labor.
- ✔ This unit is backed by our one-year replacement warranty.
Expert Insight: The Brains Behind the Brawn
Your Hummer H3 is built for toughness, but its 4L60E transmission relies on precise electronic signals to operate correctly. The TCM acts as the transmission’s brain, constantly analyzing data like vehicle speed, engine load, and throttle position to command the perfect shift. When it fails, communication breaks down, leading to the frustrating symptoms you’re seeing. Swapping in a generic, non-programmed module often creates more problems than it solves. Our VIN-specific programming ensures this new ‘brain’ speaks the exact language of your H3’s powertrain, making it the most reliable and effective way to fix the issue right the first time.
Don’t let a faulty computer chip undermine your vehicle’s rugged performance. With a straightforward installation process that takes less than an hour for most DIYers, this 2008-2010 Hummer H3 transmission control module 24238856 is the smart choice for a lasting repair. Get your H3 shifting smoothly and reliably again.
Frequently Asked Questions
Is this part truly plug-and-play?
Yes. We program the module using the VIN you provide during checkout. This ensures it has the correct software and calibration files for your specific 2008-2010 Hummer H3, allowing for a direct installation without any additional programming.
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.
Do I need any special tools for installation?
Basic hand tools are all that’s required for the physical installation. We do recommend disconnecting the battery before you begin. After installation, using a standard OBD2 scan tool to clear any stored fault codes from the vehicle’s memory is a good practice.
Will this fix a P0700 trouble code?
A P0700 code is a general transmission fault request from the TCM to the Engine Control Module (ECM) to turn on the check engine light. While this module often resolves the underlying issue causing the P0700, it’s important to diagnose any other specific codes that are present alongside it. This part is the solution for internal TCM electronic failures that trigger these codes.
Is there a core charge for my old part?
No, there is no core charge required for this part. You can keep or dispose of your old module without the hassle of sending it back.
By purchasing this 2008-2010 Hummer H3 transmission control module 24238856, you are investing in the renewed reliability and performance of your vehicle.