Restore Peak Performance to Your H3’s Transmission
Is your 2008-2010 Hummer H3 suffering from erratic shifting, a persistent check engine light, or getting stuck in gear? A faulty Transmission Control Module (TCM) can sideline your capable SUV, compromising its reliability both on and off the road. This OEM-quality T42 Transmission Control Module is the definitive, plug-and-play solution to restore its dependable performance. Pre-programmed specifically to your vehicle’s VIN, it eliminates the need for expensive dealership visits and gets you back behind the wheel 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 engineered to resolve these exact problems:
- Harsh or Delayed Shifting: Abrupt gear changes, hesitation, or slipping between gears.
- Limp Mode Activation: The vehicle is stuck in a single gear (usually 2nd or 3rd) to prevent further damage.
- Warning Lights: A lit Check Engine or Transmission light, often accompanied by Diagnostic Trouble Codes (DTCs) like P0700, P0750, or other solenoid-related faults.
- Poor Drivability: A noticeable drop in fuel economy, failure to upshift or downshift, and potential transmission overheating.
- Complete Communication Failure: The module no longer communicates with the vehicle’s other computers, leading to a no-start or no-shift condition.
Installing this pre-programmed Hummer H3 transmission control module is the most effective way to permanently fix these frustrating and potentially damaging symptoms, ensuring your vehicle operates as the manufacturer intended.
Key Features & Tangible Benefits
- ✔ 100% Plug-and-Play: We program the module to your H3’s VIN before shipping. This ensures it communicates perfectly with your vehicle’s systems right out of the box, with no additional programming required.
- ✔ Restored Drivability: Experience smooth, crisp, and predictable gear shifts that restore your vehicle’s original performance and fuel efficiency.
- ✔ Cost-Effective Solution: Avoid the high costs and lengthy wait times associated with dealership programming and diagnostics. This is a direct, efficient fix.
- ✔ OEM-Standard Quality: Built to meet or exceed original equipment specifications for durability and long-term reliability, whether you’re commuting or tackling a tough trail.
- ✔ Broad Compatibility: This T42 module is a direct replacement for multiple service numbers, including 24252114, 24234503, 24239926, and more, guaranteeing a perfect fit.
- ✔ Guaranteed Performance: This unit is backed by our one-year replacement warranty.
Expert Insight: The Brains Behind Your H3’s Brawn
The Hummer H3 is a unique vehicle, built to handle more than just the daily drive. Its transmission is a critical component of that capability. The T42 TCM acts as the transmission’s brain, constantly analyzing data like engine speed, throttle position, and vehicle load to make split-second shifting decisions. When it fails, it’s not just an inconvenience—it’s a loss of the core capability you bought the H3 for. Installing a properly programmed Hummer H3 transmission control module doesn’t just fix a problem; it restores the rugged, dependable character of your vehicle.
Frequently Asked Questions
Do I need to program this module after I receive it?
No. This module is fully pre-programmed to your vehicle’s specific VIN before it ships. It is a true plug-and-play solution, requiring no further dealership visits or special tools for programming.
Where is the TCM located on a 2008-2010 Hummer H3?
On the Hummer H3, the transmission control module is typically found in the engine compartment, on the right-hand (passenger) side, towards the rear.
Will this part fix a P0700 trouble code?
A P0700 code is a generic fault code indicating the TCM has detected a problem. While this module often resolves the underlying issue causing the P0700, you should always diagnose any other specific codes that are present. A faulty Hummer H3 transmission control module is a very common cause for this code.
Is this a new or used part?
This is an OEM-quality replacement part, built to strict standards to ensure reliability and longevity. It is not a used part pulled from a salvage vehicle.
Do I need to send my old part back?
No, there is no core charge for this module. You can keep or dispose of your old part at your convenience, making the replacement process simple and hassle-free.