Is your 2007-2008 Chevrolet Avalanche 1500 struggling with transmission problems? A truck as capable as the Avalanche deserves to run flawlessly, but a failing Transmission Control Module (TCM) can bring it to a grinding halt with harsh shifts, warning lights, or even getting stuck in one gear. Stop dealing with the frustration and uncertainty. This professionally programmed T42 Transmission Control Module is the direct, reliable solution to restore your truck’s smooth performance and get you back on the road with confidence.
Common Symptoms & Your Solution
A faulty TCM can manifest in several ways, turning your dependable truck into a source of stress. If you’re experiencing any of the following, this module is the definitive fix:
- Harsh or Erratic Shifting: Abrupt, jerky gear changes or unpredictable shifting patterns.
- Limp Mode: The vehicle is stuck in a single gear (often 2nd or 3rd) to prevent further damage.
- Delayed Engagement: A noticeable pause when shifting from Park into Drive or Reverse.
- Warning Lights: The Check Engine Light or a specific transmission warning light is illuminated on your dash.
- Diagnostic Trouble Codes (DTCs): You may have codes like P0700, P0750, or other solenoid-related faults stored in the system.
This module is engineered to resolve these issues by replacing the faulty electronic brain of your transmission. By installing our programmed 24243921 TCM, you are providing your Avalanche with a fresh, updated component ready to perform from the moment you plug it in.
Expert Insight: Why VIN Programming is a Game-Changer
Many owners and even some repair shops make the mistake of installing a used or non-programmed TCM. This almost always leads to more problems, as the module isn’t calibrated for your truck’s specific software, engine, or tire size. Our VIN programming service eliminates this critical failure point. We load the latest GM-certified software specific to your Avalanche’s VIN before the part ever leaves our facility. This means the programmed 24243921 TCM you receive is a true plug-and-play component, saving you from a costly and time-consuming trip to the dealership for programming.
Features & Benefits
- ✔ Plug-and-Play Installation: This module arrives pre-programmed to your vehicle’s specific VIN. No additional dealership programming is required, saving you time and hundreds of dollars.
- ✔ Restored Performance: Eliminates harsh shifting, limp mode, and fault codes, bringing back the smooth and responsive feel your transmission had from the factory.
- ✔ OEM-Standard Quality: Built to meet or exceed original equipment specifications, ensuring reliable communication between your engine and transmission for optimal performance.
- ✔ Broad Compatibility: A direct replacement for multiple service numbers including 24242391, 24234503, and 24252114, making it the right part for a wide range of GM trucks and SUVs.
- ✔ No Core Charge: Keep your old part without the hassle or expense of returning a core. The price you see is the price you pay.
- ✔ Peace of Mind Protection: This unit is backed by our one-year replacement warranty.
Whether you’re a seasoned DIYer tackling the job in your driveway or a professional technician, this programmed 24243921 TCM is the most efficient and reliable way to fix your Avalanche’s transmission issues for good.
Frequently Asked Questions
Do I need to take my truck to the dealer after installation?
No. This Transmission Control Module is pre-programmed to your vehicle’s VIN number. It is ready for immediate installation and operation without any need for additional dealership programming.
Where is the TCM located on my 2007-2008 Avalanche?
On the 2007-2008 Avalanche 1500, the TCM is typically located in the engine compartment, next to the battery. Always disconnect the battery before beginning the replacement process.
Is this part difficult to install?
Installation is straightforward for someone with basic mechanical skills. It generally involves disconnecting the battery, unplugging the electrical connectors, unbolting the old module, and installing the new one. The entire process usually takes under 30 minutes.
Will this fix my 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 a faulty TCM is a very common cause, this code can also be triggered by other transmission issues. Replacing a known-bad TCM is often the correct solution.
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 any additional cost or hassle.