Restore Your Buick’s Performance with a Reliable Transmission Solution
If your 2006-2009 Buick Allure is suffering from erratic shifting, getting stuck in gear, or has the check engine light on with transmission codes, you’re likely dealing with a failing Transmission Control Module (TCM). As a technician with over two decades of experience, I’ve seen firsthand how a faulty TCM can cripple a perfectly good vehicle. It’s the brain of your automatic transmission, and when it fails, it causes confusion between the engine and the gears, leading to poor performance, decreased fuel economy, and a frustrating driving experience. This isn’t just an inconvenience; it’s a critical component for your vehicle’s health and safety.
This T42 series Transmission Control Module, part number 24235753, is the definitive solution. We take the guesswork and dealership hassle out of the equation. Each module is expertly programmed to your vehicle’s specific VIN before it ships, ensuring it arrives ready for a true plug-and-play installation. This process loads the latest GM software, tailored to your Allure, to correct common factory shifting flaws and ensure seamless communication with your vehicle’s other systems. You get a reliable, long-term fix without the need for an expensive trip to the dealer for programming.
Case Study: A Tricky Diagnosis
A customer brought in a 2008 Buick LaCrosse (which uses the same T42 TCM as the Allure) with a complaint of intermittent, harsh 1-2 shifts and occasionally getting stuck in 3rd gear (limp mode). No specific solenoid codes were present, only a general P0700 (Transmission Control System Malfunction). After checking the fluid and wiring harness, everything seemed fine. The issue was so intermittent that it was hard to replicate. Based on experience with these platforms, I suspected the TCM was failing internally, likely due to heat cycles and age. We installed one of our VIN-programmed T42 modules. The customer called a week later to report the car had never shifted better. It’s a classic example of how a pre-programmed module provides a fast and certain fix for these confusing electronic issues.
Is Your Buick Allure Showing These Telltale Signs?
A failing TCM doesn’t always mean a complete transmission failure. Catching the signs early can save you from more costly repairs down the road. Here are the most common symptoms I see in the shop:
- ✔ Harsh, banging, or delayed gear shifts.
- ✔ Vehicle is stuck in one gear (often called “limp mode”).
- ✔ Check Engine Light or Transmission Warning Light is illuminated.
- ✔ Diagnostic Trouble Codes (DTCs) are stored, such as P0700, P0750, or other solenoid-related faults.
- ✔ Inability to upshift or downshift properly.
- ✔ Noticeable decrease in fuel efficiency.
- ✔ The transmission seems to slip out of gear.
DIY-Friendly TCM Installation for Your Buick
Replacing the 2006-2009 Allure TCM is a straightforward job that most DIY enthusiasts can complete in their driveway in under 30 minutes. The module is located in the engine bay, typically under the lower air cleaner housing.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts and to help reset the system.
- Locate the Module: On the Buick Allure, you’ll find the TCM mounted beneath the air cleaner box. You will need to remove the air cleaner assembly to access it.
- Disconnect and Remove: Carefully unplug the electrical connectors. They have locking tabs that need to be released. Once disconnected, unbolt the old module from its mounting bracket.
- Install the New Module: Bolt the new, pre-programmed TCM into place. Reconnect the electrical connectors, ensuring they click securely into position.
- Final Steps: Reinstall the air cleaner assembly and reconnect the battery terminal. While our programming resolves most codes, it’s good practice to use a basic OBD2 scanner to clear any lingering fault codes from the vehicle’s memory.
Verified Fitment For Your Vehicle
This module is a direct replacement for part number 24235753 and other interchangeable numbers. While it is programmed specifically for the 2006-2009 Buick Allure, this T42 TCM hardware is also used in a wide range of GM vehicles, ensuring its quality and reliability. Key fitments include:
- Buick Allure: 2006-2009 (located in lower air cleaner housing)
- Buick LaCrosse: 2006-2009 (located in lower air cleaner housing)
- Chevrolet Impala: 2006-2011 (located in lower air cleaner housing)
- Pontiac Grand Prix: 2006-2008 (located in lower air cleaner housing)
- And many other GM cars, trucks, and SUVs from 2006-2014. Please verify your part number or contact us with your VIN to confirm compatibility.
Frequently Asked Questions
Do I need to do any programming after I install this?
No. This module comes fully programmed to your vehicle’s VIN. It is a plug-and-play solution, designed to work right out of the box without requiring any additional programming from a dealership or mechanic.
Is there a core charge for my old part?
No, there is no core charge. You can keep your old module or recycle it locally without the hassle of sending it back to us.
What tools do I need for installation?
Installation typically requires only basic hand tools, such as a socket set and a screwdriver or panel tool to release the electrical connector tabs. No specialized equipment is needed.
Will this fix a P0700 code?
A P0700 code is a general fault code indicating the TCM has detected a problem. In many cases, a failing TCM is the root cause, and replacing it will resolve the P0700 and any related codes. However, you should always ensure the transmission itself and the wiring are in good condition.
What is the warranty on this part?
This Transmission Control Module is backed by our one-year warranty, covering any defects in the part or programming for your peace of mind.