If your 2006-2010 Chevrolet Malibu is suffering from jerky shifting, getting stuck in gear, or has an illuminated check engine light pointing to the transmission, you’ve likely pinpointed the culprit: a failing Transmission Control Module (TCM). As an auto repair expert with over two decades of diagnostic experience, I’ve seen these T42 modules cause countless headaches. The TCM is the electronic brain of your automatic transmission, and when it falters, the entire driving experience is compromised. This isn’t just an annoyance; it’s a reliability issue that needs a dependable solution.
This replacement T42 Transmission Control Module, corresponding to part number 24240400, is the definitive fix for these common problems. We take the guesswork and dealership expense out of the equation. Each module is expertly programmed to your vehicle’s specific VIN before it ships, ensuring it works perfectly with your Malibu’s systems right out of the box. This process installs the latest GM software updates, resolving inherent factory bugs and optimizing shift patterns for restored smoothness and fuel efficiency.
Case Study: A Tricky Diagnosis
A customer brought in a 2009 Malibu complaining of intermittent, violent shifts and the car occasionally going into ‘limp mode’ (stuck in 3rd gear). His local shop had already replaced two shift solenoids with no success, and the dreaded P0700 code kept returning. After connecting my scan tool, I saw communication dropouts from the TCM. In my shop, I’ve learned that heat cycles and vibrations on the LH frame rail where this module sits can cause internal solder joints to crack over time. We installed one of our VIN-programmed T42 modules, and the problem was solved instantly. The customer saved hundreds compared to the dealership’s quote and avoided further incorrect parts being thrown at the problem.
Is Your Malibu Showing These Transmission Warning Signs?
- ✔ Harsh, erratic, or delayed gear shifts that make driving uncomfortable.
- ✔ The vehicle is stuck in a single gear (limp mode), severely limiting speed.
- ✔ Check Engine Light or Transmission Warning Light is on with codes like P0700, P0750, or other solenoid-related DTCs.
- ✔ Complete failure to upshift or downshift, leading to poor acceleration and high RPMs.
- ✔ A noticeable drop in fuel economy due to inefficient transmission operation.
- ✔ Intermittent loss of communication with the module, causing unpredictable behavior.
A Straightforward Guide to Your Malibu TCM Replacement
Replacing the 2006-2010 Malibu TCM is a job most DIY mechanics can handle in under an hour with basic tools. The module is typically located on the driver’s side (LH) frame rail, near the front of the vehicle.
- Safety First: Always disconnect the negative terminal from your car’s battery to prevent electrical shorts and help reset the vehicle’s electronic systems.
- Locate the Module: On your Malibu, find the TCM mounted to the LH frame rail. It’s a silver box with electrical connectors.
- Disconnect and Remove: Carefully unplug the electrical harnesses. Then, unbolt the module from its mounting bracket. Keep track of the hardware.
- Install the New Module: Mount your new, VIN-programmed TCM in the same location and securely fasten it. Reconnect the electrical harnesses, ensuring they click into place.
- Final Steps: Reconnect the battery terminal. While our programming clears most faults, it’s good practice to use a basic OBD2 scanner to clear any lingering diagnostic trouble codes from the system’s memory. Start the car and enjoy smooth shifting!
Verified Fitment for Your Chevrolet Malibu and More
This module is a guaranteed direct-fit replacement for the 2006, 2007, 2008, 2009, and 2010 Chevrolet Malibu. It is also compatible with a wide range of other General Motors vehicles that use the T42 TCM and 4-speed automatic transmissions like the 4L60E and 4L65E. It is a direct replacement for multiple service numbers, including 24242391, 24234503, 24252114, and 24240400. Please see the comprehensive list below to confirm compatibility with other models.
This part will fit these makes and models with these options
ALLURE 06-09 Transmission; (lower air cleaner housing)
AVALANCHE 1500 07-08 Transmission; (next to battery)
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)
IMPALA 06-11 Transmission; (lower air cleaner housing)
ION 06-07 Transmission; (behind LH strut tower)
LACROSSE 06-09 Transmission; (lower air cleaner housing)
LUCERNE 06-11 Transmission; (LH engine compartment)
MONTE CARLO 06-07 Transmission; (lower air cleaner housing)
SAVANA VANS 06-14 Transmission; (RH engine compartment)
SIERRA TRUCKS 07-13 Transmission; (next to battery)
SILVERADO TRUCKS 07-13 Transmission; (next to battery)
TAHOE 07-09 Transmission; (next to battery)
TRAILBLAZER 06-09 Transmission; (LH engine compartment)
VUE 07-10 Transmission; (engine compartment)
YUKON 07-09 Transmission; (next to battery)
And more… please verify your part number.
Frequently Asked Questions
Do I need to have this module programmed by a dealer?
No. This is the biggest benefit of our service. We program the module to your car’s VIN before shipping, so it’s ready for plug-and-play installation. This saves you time and the high cost of dealership programming.
What is a core charge? Do I need to send my old part back?
There is absolutely no core charge for this part. You can keep your old module or dispose of it without any need to return it to us, making the process faster and more convenient for you.
Will this fix a P0700 trouble code?
A P0700 code is a general fault request from the TCM to the main engine computer (ECM) to turn on the check engine light. While this module often resolves the underlying issue causing the P0700, it’s important to have the specific transmission codes read to confirm the diagnosis. A faulty TCM is a very common cause.
Is this part difficult to install on my 2008 Malibu?
Not at all. For a 2008 Malibu, the installation is very straightforward. It requires basic hand tools to access the module on the driver’s side frame rail, disconnect the harnesses, and swap the unit. Most people can complete the job in 30-60 minutes.
What information do you need to program the module?
We only need your vehicle’s 17-digit Vehicle Identification Number (VIN). You can typically find this on your driver’s side dashboard (visible through the windshield) or on the driver’s door jamb sticker. Please provide it during checkout.