Is your 2006-2011 Chevrolet Impala suffering from jarring shifts, getting stuck in gear, or throwing transmission-related codes? You’re not alone. The Transmission Control Module (TCM) is the brain of your automatic transmission, and when it fails, it can cause a host of frustrating and potentially damaging issues. This replacement T42 TCM, part number 24235732, is the definitive solution to restore your vehicle’s performance and drivability.
As a technician with over two decades of experience, I’ve seen countless GM vehicles come into the bay with these exact symptoms. The key to a lasting repair isn’t just replacing the part—it’s ensuring the replacement is perfectly matched to your car. That’s why we offer this module fully pre-programmed to your Impala’s specific Vehicle Identification Number (VIN). This critical step eliminates the need for an expensive trip to the dealership for programming, making it a true plug-and-play fix for both DIY enthusiasts and professional shops.
Case Study: A Tricky Diagnosis
I remember an ’08 Impala that came to us after visiting two other shops. The owner complained of intermittent, violent downshifts when coming to a stop, but only after the car was fully warmed up. There were no hard codes stored, just a pending P0700 (Transmission Control System Malfunction). We monitored live data and found that the TCM was intermittently losing communication with the shift solenoids under heat soak. Swapping in this pre-programmed T42 module not only solved the harsh shifting but also improved the car’s overall responsiveness. It’s a classic failure mode for these units, and a quality, correctly programmed part is the only reliable fix.
Is Your Impala Showing These Telltale Signs?
A failing TCM can manifest in several ways. If you’re experiencing any of the following, it’s a strong indicator that your module needs attention:
- âś” Abrupt, harsh, or delayed gear changes.
- âś” The vehicle enters “limp mode,” often stuck in 2nd or 3rd gear.
- âś” Check Engine Light or Transmission Warning Light is illuminated.
- âś” Diagnostic Trouble Codes (DTCs) are present, such as P0700, P0750, or other solenoid-specific codes.
- âś” Complete failure to shift up or down.
- âś” A noticeable drop in fuel economy.
- âś” Intermittent loss of communication with the scan tool.
Your 30-Minute Path to a Smooth Ride
Installing your new 2006-2011 Impala TCM is a straightforward process that you can complete in your own driveway. For the Impala, the module is typically located under the lower air cleaner housing, making it easily accessible.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- Locate the Module: Find the TCM, which on the 2006-2011 Impala is situated beneath the air cleaner box. You may need to remove the airbox for access.
- Disconnect and Remove: Carefully unplug the electrical connectors. Press the release tabs firmly. Then, unbolt the old module from its mounting bracket.
- Install the New TCM: Bolt the new module into place and securely reconnect the electrical harnesses. You should hear a click as they lock in.
- Final Steps: Reinstall the air cleaner housing and reconnect the battery terminal. Start the vehicle to confirm the fix. We recommend using a basic scan tool to clear any lingering codes from the system.
Verified Fitment for Your Vehicle
This module is a direct replacement for part number 24235732 and other interchangeable numbers. While this page focuses on the 2006-2011 Impala TCM, it is also compatible with a wide range of GM vehicles. Please verify your specific model below:
- IMPALA 06-11 Transmission; (lower air cleaner housing)
- ALLURE 06-09 Transmission; (lower air cleaner housing)
- AVALANCHE 1500 07-08 Transmission; (next to battery)
- AURA 07-09 Transmission; (LH frame rail front)
- CANYON 08-12 Transmission; (RH rear engine compartment)
- COBALT 06-10 Transmission; (LH strut tower)
- COLORADO 08-12 Transmission; (RH rear engine compartment)
- DTS 06-11 Transmission; (RH front engine compartment)
- ENVOY 06-09 Transmission; (LH engine compartment)
- EXPRESS VANS 06-14 Transmission; (RH engine compartment)
- G5 07-10 Transmission; (LH strut tower)
- G6 06-10 Transmission; (LH strut tower)
- GRAND PRIX 06-08 Transmission; (lower air cleaner housing)
- HHR 06-11 Transmission; (LH engine compartment)
- HUMMER H3 08-10 Transmission; (RH rear engine compartment)
- ION 06-07 Transmission; (behind LH strut tower)
- LACROSSE 06-09 Transmission; (lower air cleaner housing)
- LUCERNE 06-11 Transmission; (LH engine compartment)
- MALIBU 06-10 Transmission; (LH frame rail)
- MONTE CARLO 06-07 Transmission; (lower air cleaner housing)
- MONTANA 06-09 Transmission; (LH strut tower)
- PURSUIT 06 Transmission; (LH strut tower)
- RAINIER 06-07 Transmission
- RENDEZVOUS 06-07 Transmission; (air cleaner box)
- SAAB 9-7X 06-09 Transmission; (LH engine compartment)
- SAVANA VANS 06-14 Transmission; (RH engine compartment)
- SIERRA PICKUPS 07-13 Transmission; (next to battery, check options)
- SILVERADO PICKUPS 07-13 Transmission; (next to battery, check options)
- SSR 05-06 Transmission; (front LH frame)
- SUBURBAN 1500 07-08 Transmission; (next to battery)
- TAHOE 07-09 Transmission; (next to battery)
- TERRAZA 06-07 Transmission; (LH strut tower)
- TRAILBLAZER 06-09 Transmission; (LH engine compartment)
- UPLANDER 06-09 Transmission; (LH strut tower)
- VUE 07-10 Transmission; (engine compartment, check engine size)
- YUKON & YUKON XL 07-09 Transmission; (next to battery)
Frequently Asked Questions
Q: What does ‘VIN Programmed’ actually mean for me?
A: It means the module arrives ready for installation. We load it with your vehicle’s specific VIN and the latest GM software before shipping. This ensures it communicates perfectly with your car’s engine computer and other systems, avoiding the compatibility issues and extra costs associated with a non-programmed part.
Q: Is this a difficult part to replace myself?
A: Not at all. For most DIYers with basic hand tools, this is a job that takes less than 30 minutes. The location on the Impala (under the air cleaner) is quite accessible. Just be sure to disconnect the battery first.
Q: Will this TCM fix a P0700 trouble code?
A: A P0700 code is a general fault request from the TCM to the main engine computer. While a faulty TCM is a very common cause for this code, it can also be triggered by other transmission issues. However, if you are also experiencing shifting problems, replacing the TCM is the most likely solution.
Q: Do I need to send my old TCM back (core charge)?
A: No, there is no core charge for this part. You can keep or dispose of your old module without any hassle.
Q: How do I provide my VIN for programming?
A: You will be prompted to enter your vehicle’s 17-digit VIN during the checkout process. Please double-check it for accuracy to ensure correct programming.