Restore Your Buick’s Shifting Performance
Is your 2005 Buick Allure suffering from erratic shifting, getting stuck in gear, or throwing a check engine light? As a technician with over two decades of experience, I’ve seen these symptoms countless times. More often than not, the culprit is a failing Transmission Control Module (TCM). A faulty TCM can turn a smooth ride into a frustrating and unpredictable experience. This isn’t just an annoyance; it’s a critical component failure that can affect your vehicle’s safety and reliability.
This replacement TCM is the definitive solution to get your car driving like new again. We take the guesswork and high costs out of the repair process. Before we ship this module to you, our experts will program it with the very latest GM software, specifically matched to your vehicle using your VIN. This means you receive a part that is 100% ready to install, with no need for an expensive trip to the dealership for programming. It’s the most direct path to resolving those nagging transmission issues.
A Technician’s Notebook: The Misleading Limp Mode
I remember a 2005 LaCrosse—which shares its platform with the Allure—that came into my bay stuck in what the owner called “limp mode.” It would only stay in 2nd or 3rd gear. The initial scan showed a generic transmission error (P0700), but no specific solenoid codes. Many shops might start by throwing expensive hard parts at it. However, after checking the wiring harness, I suspected the TCM. We installed a VIN-programmed module, and the car immediately started shifting perfectly through all gears. The issue wasn’t a mechanical failure inside the transmission; it was the computer making the decisions. This is why a reliable 2005 Allure Transmission Module is often the smartest first step in the diagnostic process.
Is Your Allure Exhibiting These Symptoms?
A failing TCM can manifest in several ways. If you’re noticing any of the following, it’s a strong indicator that your module needs attention. I’ve personally linked these issues to TCM failures on hundreds of GM vehicles from this era.
- âś” Harsh, delayed, or slamming shifts between gears.
- âś” The transmission refusing to shift up or down.
- âś” Vehicle feels stuck in one gear (often called “limp mode”).
- âś” Check Engine Light is on with transmission-related Diagnostic Trouble Codes (DTCs) like P0700 or communication codes like U0100.
- âś” A significant, unexplained drop in fuel economy.
- âś” The gear selector indicator (P-R-N-D) on the dash may be blank or incorrect.
A Straightforward Guide to Installation
One of the biggest benefits of this pre-programmed 2005 Allure Transmission Module is its simple, direct-fit installation. For a confident DIYer, this can be done in your own garage.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- Locate the TCM: On the 2005 Allure, the TCM is typically found mounted to the lower air cleaner housing in the engine bay. You may need to remove the air filter box for access.
- 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: Mount your new, pre-programmed TCM in the same location. Securely reconnect the electrical connectors, ensuring they click into place.
- Final Steps: Reinstall the air cleaner housing and any other components you removed. Reconnect the negative battery terminal. Your vehicle is now ready for a test drive!
Guaranteed Fitment for Your Vehicle
This module is a direct replacement for a wide range of 2004-2005 GM vehicles. Please verify your model and specific options below. It is compatible with part numbers: 24223112, 24226863, 24233595, 24234189, 24239427, YBWW, YDFC, YDFD, YDLT, YJHY, YKTB, and YKTF.
COBALT 05 Transmission; (LH strut tower)
CORVETTE 05 Transmission; (LH frame rail)
ENVOY 05 Transmission; (LH engine compartment), (8 cylinder)
ENVOY XL 05 Transmission; (LH engine compartment), (8 cylinder)
ENVOY XUV 05 Transmission; (LH engine compartment), (8 cylinder)
GRAND PRIX 05 Transmission; (lower air cleaner housing)
GTO 05 Transmission
ION 05 Transmission; (behind LH strut tower)
LACROSSE 05 Transmission; (3.6L), (lower air cleaner housing)
PURSUIT 05 Transmission; (LH strut tower)
RAINIER 05 Transmission
RENDEZVOUS 04-05 Transmission; (3.6L), (air cleaner box)
TRAILBLAZER EXT 05 Transmission; (LH engine compartment), (8 cylinder)
Frequently Asked Questions
Frequently Asked Questions
2005 Allure Transmission Module
Will this fix my specific transmission problem?
This is a common solution for many electronic transmission issues, including harsh shifting and communication codes. While we can’t diagnose your vehicle remotely, if your mechanic has identified the TCM as the faulty component, this part is the correct fix.