Restore Peak Performance to Your Avalanche’s Transmission
Is your 2007-2008 Chevrolet Avalanche 1500 suffering from harsh, erratic shifting, getting stuck in gear, or displaying a persistent check engine light? These are classic signs of a failing Transmission Control Module (TCM). Don’t let a faulty computer sideline your powerful and versatile truck. This genuine GM T42 TCM, service number 24256960, is the definitive solution, arriving pre-programmed to your vehicle’s specific VIN for a hassle-free, plug-and-play installation.
Common Symptoms & Your Solution
A failing TCM can cause a cascade of frustrating and potentially damaging issues. If you recognize any of the following symptoms, this module is designed to be the direct fix:
- Harsh or Delayed Shifting: Abrupt gear changes, slamming into gear, or a noticeable lag when shifting.
- Stuck in Limp Mode: The transmission refuses to shift, often getting stuck in 2nd or 3rd gear as a protective measure.
- Warning Lights: The Check Engine Light or a specific transmission warning light is illuminated on your dash.
- Diagnostic Trouble Codes (DTCs): You’ve pulled codes like P0700 (Transmission Control System Malfunction) or other solenoid-related faults.
- Poor Performance: A sudden drop in fuel economy or the transmission feeling like it’s slipping.
By replacing your old unit with this precisely programmed 2007-2008 Avalanche 1500 transmission control module, you directly address the electronic brain of your transmission, restoring the crisp, reliable performance you expect.
Key Features & Tangible Benefits
- ✔ 100% Plug-and-Play: This module is expertly programmed to your truck’s VIN before shipping. This critical step ensures perfect communication between the TCM and your vehicle’s other systems, eliminating the need for an expensive trip to the dealership for programming.
- ✔ Restores Smooth Operation: By precisely managing shift points, torque converter lockup, and line pressure, this TCM brings back the smooth, predictable shifting your Avalanche had from the factory.
- ✔ Clears Persistent Codes: A new, correctly programmed TCM is often the only way to permanently resolve stubborn transmission-related DTCs that keep coming back.
- ✔ Built to OEM Standards: Engineered for durability and reliability, this module meets strict General Motors quality standards to handle the demands of daily driving, hauling, or towing.
- ✔ Guaranteed Protection: This unit is backed by our one-year replacement warranty.
An Expert’s Note: Over two decades in diagnostics, I’ve seen countless drivers chase expensive mechanical repairs when the root cause was a failing TCM. The electronics in these modules are exposed to heat and vibration, causing internal failures over time. Our VIN programming isn’t just a convenience—it’s essential. It loads your Avalanche’s specific factory software and shift strategies, ensuring the new module performs exactly as the engineers intended, which is something a generic, unprogrammed part can never do.
Installation is straightforward for the DIY mechanic, typically located next to the battery in the engine compartment. Simply disconnect the battery, swap the modules, and reconnect. This high-quality 2007-2008 Avalanche 1500 transmission control module is the most effective way to solve your transmission woes and get your truck back on the road with confidence.
Frequently Asked Questions
What does “VIN Programmed” actually mean?
It means we flash the module with your vehicle’s unique 17-digit Vehicle Identification Number (VIN) before we ship it. This loads the correct software and calibrations specific to your Avalanche’s engine, axle ratio, and other factory options, making it ready for immediate installation without any extra steps.
Is this a difficult part to install myself?
For most individuals with basic mechanical skills, this is a very manageable job. The TCM is typically located in the engine bay and is accessible with common hand tools. The entire process often takes less than 30 minutes. Always disconnect the battery’s negative terminal before you begin.
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 that triggered the P0700, it’s always wise to have the specific secondary codes read by a scanner to confirm the diagnosis. In many cases, a faulty TCM is the culprit.
Do I need to send my old part back?
No, there is no core charge for this part. You can keep your old module, which saves you the time and hassle of packaging and shipping it back to us.
How can I be sure this is the right TCM for my truck?
This module is the correct fit for the 2007-2008 Chevrolet Avalanche 1500. It also replaces numerous other part numbers, including 24252114, 24234503, and 24242391. If you’re unsure, please contact our support team with your VIN, and we will verify the fitment for you.