Restore Smooth Shifting to Your Chevrolet Impala
If your 2006-2011 Chevrolet Impala is suffering from erratic shifting, getting stuck in gear, or throwing transmission-related trouble codes, a failing Transmission Control Module (TCM) is the most likely culprit. As a seasoned technician with over two decades of experience, I’ve seen firsthand how a faulty TCM can cripple an otherwise reliable vehicle. This T42 series TCM, part number 24240400, is the definitive solution, arriving pre-programmed to your vehicle’s specific VIN for a true plug-and-play repair that eliminates the need for expensive dealership visits.
Case Study: The Intermittent Limp-Mode Impala
A customer brought in their ’09 Impala with a frustrating problem: it would randomly drop into limp mode (stuck in 3rd gear) with a P0700 code, but only after driving for 20-30 minutes. After cooling down, it would drive fine again. We checked the wiring and solenoids, which all tested good. This intermittent heat-soak failure is a classic sign of a dying TCM. The internal electronics break down under normal operating temperature. We installed one of our VIN-programmed T42 modules, and the problem was solved permanently. The customer was back on the road with a reliable car, avoiding a costly diagnostic chase at the dealership.
Is Your Impala Showing These Symptoms?
- ✔ Harsh, slamming shifts or delayed gear engagement.
- ✔ Vehicle is stuck in “limp mode,” refusing to shift out of 2nd or 3rd gear.
- ✔ The Check Engine Light or Transmission Warning Light is illuminated.
- ✔ Diagnostic Trouble Codes (DTCs) are present, such as P0700, P0750, or other solenoid-specific codes.
- ✔ A sudden drop in fuel economy or the transmission overheating.
- ✔ Complete loss of communication with the transmission module.
Your Step-by-Step Installation Guide
For the 2006-2011 Impala, this is a job most DIYers can handle in their driveway in under 30 minutes. The TCM is 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 is situated beneath the air cleaner box in the engine bay.
- Remove Connectors: Carefully unclip the electrical connectors from the old TCM. Pay attention to the locking tabs to avoid damage.
- Unbolt the Old TCM: Remove the mounting bolts holding the module in place and set the old unit aside. There’s no core charge, so you don’t need to send it back.
- Install the New Module: Mount your new, pre-programmed TCM and securely fasten the bolts. Reconnect the electrical harnesses.
- Final Steps: Reconnect the battery terminal. While our programming handles the critical setup, it’s good practice to use a basic scan tool to clear any stored fault codes from the vehicle’s memory.
Will This Fit My Vehicle?
This T42 TCM is a guaranteed fit for the 2006-2011 Chevrolet Impala. It also serves as a direct replacement for a wide range of other General Motors vehicles. Please verify your model and year from the list below. This part is interchangeable with service numbers: 24252114, 24234503, 24230461, 24234274, 24235340, 24235754, 24238856, 24239224, 24239926, 24240400, 24241806, 24243901, 24243921, 24252114, 24255280, 24256960, 24235732, 24235753, 24240449, and YNXS.
ENVOY 08-09 Transmission; (LH engine compartment)
SAVANA 3500 VAN 06-14 Transmission; (RH engine compartment)
VUE 07-08 Transmission; 2.4L, (LH front engine compartment)
G5 07-10 Transmission; (LH strut tower)
SIERRA 1500 PICKUP 07 Transmission; (new style, smooth door skin), (next to battery)
LUCERNE 06-07 Transmission; (4.6L), (LH engine compartment)
VUE 09 Transmission; 2.4L, w/hybrid, LH side front engine compartment, (shift control)
VUE 10 Transmission
TAHOE 08-09 Transmission; (next to battery), w/o auxiliary oil cooler pump
YUKON XL 1500 07-08 Transmission; (next to battery)
AURA 07-09 Transmission; (LH frame rail front)
RENDEZVOUS 06-07 Transmission; (air cleaner box)
SAAB 9-7X 06-09 Transmission; (LH engine compartment)
SAVANA 2500 VAN 06-14 Transmission; (RH engine compartment)
ALLURE 06-09 Transmission; (lower air cleaner housing)
LUCERNE 08-11 Transmission; (LH engine compartment)
RAINIER 06-07 Transmission
SILVERADO 1500 PICKUP 07 Transmission; (new style, smooth door skin), (next to battery)
SILVERADO 1500 PICKUP 09-13 Transmission; (next to battery), w/o hybrid option
YUKON 09 Transmission; (next to battery), w/o auxiliary oil cooler pump
ENVOY 06-07 Transmission; (LH engine compartment), (8 cylinder)
MONTE CARLO 06-07 Transmission; (lower air cleaner housing)
YUKON 08 Transmission; (next to battery), w/o auxiliary oil cooler control
EXPRESS 1500 VAN 06-14 Transmission; (RH engine compartment)
SSR 05-06 Transmission; (front LH frame)
SAVANA 1500 VAN 06-14 Transmission; (RH engine compartment)
SIERRA 1500 PICKUP 09-13 Transmission; (next to battery), w/o hybrid option
EXPRESS 3500 VAN 06-14 Transmission; (RH engine compartment)
ION 06-07 Transmission; (behind LH strut tower)
PURSUIT 06 Transmission; (LH strut tower)
TAHOE 07 Transmission; (next to battery)
ENVOY XL 06 Transmission; (LH engine compartment), (8 cylinder)
EXPRESS 2500 VAN 06-14 Transmission; (RH engine compartment)
IMPALA 06-11 Transmission; (lower air cleaner housing)
MONTANA 06-09 Transmission; (LH strut tower)
TRAILBLAZER 08-09 Transmission; (LH engine compartment)
YUKON 07 Transmission; (next to battery)
G6 06-10 Transmission; (LH strut tower)
HHR 06-11 Transmission; (LH engine compartment)
TRAILBLAZER 06-07 Transmission; (LH engine compartment), (8 cylinder)
AVALANCHE 1500 07-08 Transmission; (next to battery)
COBALT 06-10 Transmission; (LH strut tower)
SIERRA 1500 PICKUP 08 Transmission; (next to battery)
SILVERADO 1500 PICKUP 08 Transmission; (next to battery)
LACROSSE 06-09 Transmission; (lower air cleaner housing)
SIERRA 2500 PICKUP 07 Transmission; new style (smooth door skin), 6.0L, (next to battery)
SILVERADO 2500 PICKUP 07 Transmission; new style (smooth door skin), 6.0L, (next to battery)
COLORADO 08-12 Transmission; (RH rear engine compartment)
SUBURBAN 1500 07-08 Transmission; (next to battery)
VUE 09 Transmission; 2.4L, w/o hybrid; (LH front engine compartment)
CANYON 08-12 Transmission; (RH rear engine compartment)
DTS 06-11 Transmission; (RH front engine compartment)
MALIBU 06-10 Transmission; (LH frame rail)
GRAND PRIX 06-08 Transmission; (lower air cleaner housing)
HUMMER H3 08-10 Transmission; (RH rear engine compartment)
TERRAZA 06-07 Transmission; (LH strut tower)
TRAILBLAZER EXT 06 Transmission; (LH engine compartment), (8 cylinder)
UPLANDER 06-09 Transmission; (LH strut tower)
Frequently Asked Questions
What does ‘VIN Programmed’ mean for my 2006-2011 Impala TCM?
It means we flash the module with your car’s specific Vehicle Identification Number (VIN) and the latest GM software before shipping. This ensures it communicates perfectly with your Impala’s engine computer and other systems right out of the box, with no additional programming required.
Do I need any special tools for this installation?
No special tools are required. Basic hand tools like a socket set and screwdrivers are all you need to access and replace the TCM on an Impala. A simple code scanner is helpful for clearing old codes but not mandatory for the part to function.
Will this fix a P0700 trouble code?
A P0700 code is a general fault request from the TCM to the main engine computer. While this programmed TCM often resolves the root cause of the P0700 (like a bad solenoid driver), you should always diagnose any other codes that appear alongside it. In many cases, replacing the faulty TCM is the correct fix.
Is there a core charge for my old part?
No, we do not require you to return your old, faulty module. There is no core charge, which simplifies the repair process for you.