Is Your 2006-2011 Impala Shifting Erratically?
If your Chevrolet Impala is experiencing harsh shifting, getting stuck in gear, or has an illuminated Check Engine Light, a failing Transmission Control Module (TCM) is the most likely culprit. The TCM is the electronic brain of your automatic transmission, responsible for orchestrating every gear change and ensuring smooth, efficient operation. When it fails, it can cause a cascade of frustrating and potentially damaging issues. This VIN-programmed GM T42 TCM is the definitive solution to restore your vehicle’s transmission performance and get you back on the road with confidence.
From the Diagnostic Bay
We had a 2009 Impala come into the shop stuck in ‘limp mode’—it wouldn’t shift out of 3rd gear. The customer had already replaced two shift solenoids based on the DTC codes (P0752), but the problem persisted. A quick check of the TCM data stream showed erratic commands being sent to the solenoids. The internal circuitry of the original module had failed. After installing one of our VIN-programmed T42 modules, we cleared the codes, and the car shifted perfectly on the test drive. Don’t waste money chasing solenoids when the root cause is often the module itself.
Symptoms of a Failing Impala TCM
A faulty TCM can manifest in various ways. If you’re noticing any of the following signs, it’s time to consider a replacement. Ignoring these symptoms can lead to more severe transmission damage and costly repairs down the line.
- ✔ Harsh or Delayed Shifting: Experiencing sudden, jarring shifts or a noticeable delay when the transmission engages from Park to Drive or Reverse.
- ✔ Stuck in Limp Mode: The vehicle refuses to shift past 2nd or 3rd gear as a protective measure, severely limiting your speed and performance.
- ✔ Transmission Warning Lights: The Check Engine Light or a dedicated transmission warning light is illuminated on your dashboard.
- ✔ Diagnostic Trouble Codes (DTCs): Common codes associated with TCM failure include P0700 (Transmission Control System Malfunction), P0750-P0758 (Shift Solenoid errors), and other communication-related faults.
- ✔ Poor Fuel Economy: Inefficient shifting and torque converter lock-up can lead to a sudden and unexplained drop in your vehicle’s gas mileage.
- ✔ No Upshift or Downshift: The transmission may fail to shift into higher gears as you accelerate or fail to downshift when you slow down, causing the engine to bog down or race.
The Superior Solution: A Programmed 2006-2011 Impala TCM
This isn’t just a replacement part; it’s a complete, ready-to-install solution. The biggest hurdle in replacing a modern vehicle module is the need for expensive dealership programming. We eliminate that step entirely. By programming this T42 TCM to your Impala’s specific Vehicle Identification Number (VIN) before it ships, we ensure it communicates flawlessly with your car’s other systems right out of the box. This module is loaded with the latest GM software updates to correct known factory issues and optimize transmission behavior for longevity and performance.
Built to strict OEM specifications, this module provides the reliability and durability you expect from a factory component. It directly replaces a wide range of service numbers, including 24242391, 24234503, and 24252114, making it a versatile fix for many GM vehicles. For your 2006-2011 Impala, this TCM is located in the lower air cleaner housing, making for a straightforward installation that can typically be completed in under 30 minutes with basic hand tools.
Frequently Asked Questions
Do I need to take this part to a dealer for programming?
No. This Transmission Control Module comes pre-programmed to your vehicle’s VIN. It is a true plug-and-play solution, saving you the time and expense of a dealership visit. Simply provide your VIN at checkout.
Where is the TCM located on my 2006-2011 Impala?
On the 2006-2011 Chevrolet Impala, the TCM is typically found attached to the lower air cleaner housing in the engine bay. Always disconnect the vehicle’s battery before beginning the removal and installation process.
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 of a P0700 code (and the specific codes that triggered it), you should always ensure the transmission’s mechanical and electrical components (like wiring and solenoids) are in good condition.
Is there a core charge for this part?
No, there is no core charge required for this module. You can keep your old part without the hassle of returning it, making the replacement process simpler and more convenient.
What if I have a different GM vehicle?
This T42 TCM is compatible with a wide range of GM vehicles from 2006-2014, including many Chevrolet, GMC, Buick, Pontiac, and Cadillac models equipped with 4-speed automatic transmissions like the 4L60E and 4L65E. Please verify the part number or use our vehicle fitment tool to confirm compatibility.