Restore Your Vehicle’s Shifting Performance
Are you tired of dealing with unpredictable and harsh transmission shifts in your 2005 GM vehicle? A faulty Transmission Control Module (TCM) is often the culprit behind issues like delayed gear engagement, getting stuck in gear (limp mode), or an illuminated Check Engine Light. As a technician with over two decades of experience, I’ve seen firsthand how a failing TCM can turn a reliable car into a source of daily frustration. This replacement module, part number 24233595, is the definitive solution to restore the smooth, precise shifting you expect from your vehicle.
The biggest hurdle in replacing a modern vehicle module is the programming. This is where we make your repair simple. Before this part ships, we will program it with the latest official GM software updates, using the Vehicle Identification Number (VIN) you provide. This critical step ensures the module communicates perfectly with your vehicle’s specific engine and options, eliminating the need for an expensive trip to the dealership. This isn’t just a replacement part; it’s a complete, ready-to-install fix for your transmission woes.
From the Diagnostic Bay: The Intermittent Shifting Ghost
I remember a 2005 Pontiac Grand Prix that came into my shop with a frustratingly intermittent problem. The owner complained of random, jarring shifts and occasional hesitation, but there were no consistent trouble codes stored. After checking the fluid, solenoids, and wiring harness, everything seemed fine. On a hunch, based on hundreds of similar cases, we connected a scan tool to monitor live data from the TCM. We noticed the module would momentarily drop communication right before a harsh shift. It was a classic sign of internal TCM failure. We installed a VIN-programmed 2005 Allure Transmission Module (the same part fits the Grand Prix), and the problem vanished instantly. The customer was thrilled to have his smooth-driving car back without a costly transmission rebuild.
Common Signs of a Failing TCM
- ✔ Harsh or erratic shifting between gears
- ✔ Delayed engagement when shifting from Park to Drive or Reverse
- ✔ Vehicle stuck in one gear (often called “limp mode”)
- ✔ Unexplained Check Engine Light or Transmission Warning Light
- ✔ Stored Diagnostic Trouble Codes (DTCs) such as P0700, P0751, P0756, or U0101
- ✔ Poor fuel economy due to inefficient shifting
A Straightforward Guide to Installation
Installing your new 2005 Allure Transmission Module is a manageable job for a confident DIYer. The exact location can vary slightly by model, but the process is generally the same.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts.
- Locate the TCM: On many models like the Allure, LaCrosse, and Grand Prix, the TCM is found mounted to the transmission or under the air cleaner housing. For models like the Cobalt or Ion, it’s often behind the driver-side strut tower.
- Disconnect and Remove: Carefully unplug the electrical connectors from the old module. Press the release tabs firmly to avoid breaking them. Then, unbolt the module from its mounting bracket.
- Install the New Module: Bolt the new, pre-programmed TCM into place. Ensure the electrical connectors are clean and free of debris before plugging them in securely. You should hear a ‘click’ as they lock into place.
- Final Step: Reconnect the negative battery terminal. Start the vehicle and allow it to idle for a few minutes. A short test drive with gentle acceleration will allow the system to fully sync.
Verified Vehicle Compatibility
This module is a direct replacement for part number 24233595 and is also compatible with part numbers 24223112, 24226863, 24234189, 24239427, YBWW, YDFC, YDFD, YDLT, YJHY, YKTB, and YKTF. It is guaranteed to fit the following 2005 models:
- Buick Allure: (Lower air cleaner housing)
- Buick LaCrosse: (3.6L, lower air cleaner housing)
- Buick Rainier: (Transmission mounted)
- Buick Rendezvous: (2004-2005, 3.6L, in air cleaner box)
- Chevrolet Cobalt: (Behind LH strut tower)
- Chevrolet Corvette: (LH frame rail)
- Chevrolet Trailblazer EXT: (8 cylinder, LH engine compartment)
- GMC Envoy / Envoy XL / Envoy XUV: (8 cylinder, LH engine compartment)
- Pontiac GTO: (Transmission mounted)
- Pontiac Grand Prix: (Lower air cleaner housing)
- Pontiac Pursuit: (Behind LH strut tower)
- Saturn ION: (Behind LH strut tower)
Why VIN Programming is Essential
A 2005 Allure Transmission Module is not a one-size-fits-all part. Your vehicle has a unique combination of software and calibrations based on its engine, differential, and other factory options. By programming this module to your specific VIN, we ensure it operates exactly as GM intended. This process activates the correct shift strategies, torque converter clutch schedules, and pressure controls, resulting in optimal performance, longevity, and fuel efficiency. Don’t settle for a generic module that requires extra costs and hassle—get the right solution, ready to install, right out of the box.
Do I need to get this module programmed by a dealer?
No. We handle all the programming for you before shipment. Simply provide your vehicle’s 17-digit VIN during checkout, and the module will arrive ready to install.
Where can I find my VIN?
Your VIN is typically located on a tag on the driver’s side of the dashboard (visible through the windshield), on the driver’s side door jamb sticker, or on your vehicle’s registration and insurance documents.
Is this part truly plug-and-play?
Yes. Once we have programmed it to your VIN, the installation is a direct swap. No special tools or additional programming steps are required.
What happens if I forget to provide my VIN?
We cannot ship your order without the VIN, as the programming is essential for the part to function correctly in your vehicle. We will contact you to retrieve the number before we can process and ship your module.
Will this fix a P0700 trouble code?
A P0700 code is a general transmission fault request. While a failing TCM is a very common cause, this code can also be triggered by other issues. This module will resolve the problem if the TCM is the root cause. Proper diagnosis is always recommended.