Restore Peak Transmission Performance in Your Chevy Avalanche
Is your 2007-2008 Chevrolet Avalanche 1500 suffering from delayed shifts, getting stuck in gear, or throwing transmission codes? Don’t let a faulty Transmission Control Module (TCM) sideline your powerful truck. This OEM-quality T42 TCM, part number 24235340, is the definitive solution, arriving expertly programmed to your vehicle’s specific VIN. This eliminates the need for expensive dealership programming, making it a true plug-and-play fix for both professional mechanics and DIY enthusiasts.
A Technician’s Notebook: The Intermittent Limp Mode Nightmare
I remember a 2008 Avalanche that came into my shop with a maddeningly intermittent problem. The owner said it would randomly get stuck in 3rd gear (limp mode), but only after driving for 20-30 minutes. He’d already replaced a shift solenoid at another shop, but the issue persisted. After scanning, we found a generic P0700 code but no specific solenoid faults. Experience pointed me toward the TCM. Heat soak was causing an internal failure in the module, disrupting communication. We installed one of our VIN-programmed T42 modules, and the problem was solved instantly. The customer was thrilled to have his truck’s reliability back without a costly diagnostic chase.
Is Your Avalanche Exhibiting These Transmission Problems?
A failing TCM can manifest in several ways that disrupt your driving experience. If you’re noticing any of the following, it’s a strong indicator that your module needs replacement:
- ✔ Harsh, erratic, or slamming gear changes.
- ✔ The vehicle is stuck in a single gear (often called “limp mode”).
- ✔ Check Engine Light is on with transmission-related Diagnostic Trouble Codes (DTCs) like P0700, P0750, or other solenoid circuit codes.
- ✔ Failure to upshift or downshift properly, leading to poor acceleration.
- ✔ A noticeable decrease in fuel economy.
- ✔ The transmission feels like it’s slipping between gears.
The Smart Solution: A Pre-Programmed 2007-2008 Avalanche 1500 TCM
This isn’t a generic, one-size-fits-all part. We take your vehicle’s VIN and program the module with the latest GM software updates. This ensures that the TCM communicates flawlessly with your truck’s engine computer (ECM) and other systems, restoring the precise shift logic and torque converter lockup strategy designed by the factory. You get a reliable, long-term fix that restores drivability and peace of mind.
Your Quick and Simple Installation Guide
You can get this job done in your own driveway in under 30 minutes with basic hand tools. Here’s how:
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- Locate the Old TCM: On the 2007-2008 Avalanche 1500, the TCM is typically located in the engine bay, right next to the battery.
- Disconnect and Remove: Carefully unplug the electrical connectors from the old module. Then, unbolt it from its mounting bracket.
- Install the New Module: Bolt the new, pre-programmed TCM into place and securely reconnect the electrical harnesses. You’ll hear a click as they lock in.
- Final Steps: Reconnect your battery terminal. While the module is plug-and-play, it’s always best practice to use a basic OBD2 scan tool to clear any stored fault codes from the system.
Verified Fitment for Your General Motors Vehicle
While this is the perfect part for your 2007-2008 Avalanche, this T42 TCM is also a direct-fit replacement for a wide range of GM cars, trucks, and SUVs. It is interchangeable with multiple part numbers, including 24252114, 24234503, and 24235754. It is compatible with models like:
- ✔ Chevrolet Silverado, Tahoe, Suburban, Express, Impala, HHR
- ✔ GMC Sierra, Yukon, Savana
- ✔ Cadillac DTS
- ✔ Hummer H3
- ✔ Pontiac G6, Grand Prix
- …and many other GM vehicles equipped with 4-speed automatic transmissions from 2006-2014.
Frequently Asked Questions
What does a Transmission Control Module (TCM) do?
The TCM is the electronic brain of your automatic transmission. It receives data from various sensors and controls when the transmission shifts gears, how firmly it shifts, and when the torque converter locks up, ensuring smooth and efficient operation.
Do I really need to provide my VIN?
Yes. Providing your VIN is essential. We use it to load the exact factory software for your specific Avalanche 1500. This step is what makes the installation plug-and-play and guarantees correct transmission function without a trip to the dealer.
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 (like an internal TCM failure), it’s important to ensure there are no other issues, such as faulty wiring or solenoids. In many cases, a new TCM is the correct fix.
Is there a core charge for my old part?
No, there is absolutely no core charge. You can keep your old module or dispose of it without the hassle of sending it back.
What kind of warranty is included?
This module is backed by our one-year, hassle-free warranty, giving you confidence and peace of mind in your repair.