Get Your Tough H3 Shifting Smoothly Again
Is your HUMMER H3 suffering from erratic shifting, getting stuck in gear, or throwing transmission codes? A faulty Transmission Control Module (TCM) can sideline even the most capable vehicle, turning every drive into a frustrating and unpredictable experience. This genuine GM T42 TCM, service part number 24240400, is the definitive solution to restore your truck’s performance. We pre-program it to your H3’s specific VIN, ensuring it works perfectly right out of the box—no expensive dealership visits or complicated programming tools required.
Common Symptoms & Your Solution
If you’re experiencing any of the following issues, a failing TCM is the likely culprit. This module is engineered to resolve these problems and get your H3 back to its reliable, powerful self:
- Harsh, banging shifts between gears
- Vehicle stuck in “limp mode” (usually 2nd or 3rd gear)
- Delayed engagement when shifting from Park to Drive or Reverse
- Check Engine Light with transmission-specific Diagnostic Trouble Codes (DTCs) like P0700, P0750, or other solenoid-related faults
- Poor acceleration and decreased fuel economy
Installing this pre-programmed 2008-2010 HUMMER H3 transmission control module is the most effective way to permanently fix these issues and restore the crisp, intelligent shifting you expect.
Features & Benefits
- ✔ 100% Plug-and-Play Installation: This module arrives pre-programmed to your vehicle’s exact VIN. Simply install it, and you’re ready to go. It eliminates the need for dealership programming, saving you time and hundreds of dollars.
- ✔ Restored Drivability: By precisely managing shift points, torque converter lockup, and line pressure, this TCM restores the smooth and responsive performance your H3 had from the factory.
- ✔ Built for Durability: Engineered to meet strict OEM standards, this module is built to withstand the demanding conditions your HUMMER was designed for, from daily commutes to off-road trails.
- ✔ Clear Pesky Warning Lights: This is the correct fix for common transmission-related DTCs, helping you clear your dashboard of warning lights and pass inspections.
- ✔ Purchase with Confidence: This unit is backed by our one-year replacement warranty.
Expert Insight: The Critical Role of VIN Programming
Unlike a generic, off-the-shelf part, a VIN-programmed TCM is loaded with the specific software and calibrations for your HUMMER H3’s unique configuration—including its engine, axle ratio, and tire size. This precision is not a luxury; it’s essential for proper transmission function. Using a non-programmed module often results in continued poor shifting and can even cause long-term damage to your transmission. Our programming service ensures your new 2008-2010 HUMMER H3 transmission control module communicates flawlessly with your vehicle’s other systems, delivering optimal performance and longevity.
Frequently Asked Questions
What does the transmission control module do on a HUMMER H3?
The TCM acts as the brain for your automatic transmission. It collects data from various sensors on the engine and vehicle to control exactly when the transmission shifts gears, ensuring smooth operation, proper performance, and optimal fuel efficiency.
Is this part truly plug-and-play?
Yes. During checkout, we require your vehicle’s VIN. We use this to program the module with the latest GM software specific to your H3. This means you can install it yourself or have your mechanic do it without needing any special dealer-level scan tools for setup.
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, it’s essential to have the specific underlying codes (e.g., P0751, P0756) read to confirm the diagnosis. In many cases involving solenoid or internal controller faults, replacing the 2008-2010 HUMMER H3 transmission control module is the correct repair.
Where is the TCM located on my 2008-2010 H3?
On the HUMMER H3 from 2008 to 2010, the transmission control module is typically located in the engine compartment, on the right-hand (passenger) side, towards the rear.
Do I need to send my old part back?
No. There is no core charge for this part. You can keep or dispose of your old module, making the replacement process faster and more convenient for you.