If your 2006-2007 Chevrolet Monte Carlo is suffering from erratic shifting, getting stuck in gear, or has an illuminated check engine light, you’re likely dealing with a failing Transmission Control Module (TCM). As a technician with over two decades of experience, I’ve seen countless GM vehicles sidelined by this exact issue. The TCM is the brain of your automatic transmission, and when it fails, it can make your car feel unpredictable and unsafe to drive. This isn’t just an annoyance; it’s a critical component for your vehicle’s performance and longevity.
This T42 Transmission Control Module, corresponding to part number 24234503, is the definitive solution. We take the guesswork and extra cost out of the repair by pre-programming the module to your car’s specific Vehicle Identification Number (VIN). This means it arrives at your door ready for a true plug-and-play installation, with no need for an expensive trip to the dealership for programming. It’s designed to restore the precise, smooth shifting you expect from your Monte Carlo, directly addressing the root cause of many transmission-related diagnostic trouble codes (DTCs).
From the Diagnostic Bay: A Common Monte Carlo Shifting Issue
A customer brought in his ’07 Monte Carlo complaining of a hard 1-2 shift and intermittent ‘limp mode,’ where the car would get stuck in 3rd gear. His scanner showed a P0700 (Transmission Control System Malfunction) and a solenoid performance code. After confirming the wiring and solenoids were good, we pinpointed the TCM. These modules are known to develop internal faults from heat cycles and vibration over the years. We installed a VIN-programmed unit just like this one, and the car was shifting perfectly within 30 minutes. It’s a common, straightforward fix that makes a world of difference.
Is Your Monte Carlo Exhibiting These Transmission Problems?
A faulty TCM can manifest in several ways. If you’re noticing any of the following symptoms, it’s a strong indicator that your module needs replacement. Addressing it promptly can prevent further damage to your transmission’s mechanical components.
- ✔ Harsh, jerky, or delayed gear shifts.
- ✔ Vehicle is stuck in one gear (often called ‘limp mode’).
- ✔ Check Engine Light or Transmission Warning Light is on.
- ✔ Diagnostic Trouble Codes (DTCs) are present, especially P0700, P0750, or other solenoid-related codes.
- ✔ The transmission seems to slip out of gear unexpectedly.
- ✔ Poor acceleration and decreased fuel economy.
- ✔ Complete loss of communication with the transmission module.
A DIY-Friendly Guide to Your 2006-2007 Monte Carlo TCM Installation
One of the best features of this part is its simple installation. For the 2006-2007 Monte Carlo, the TCM is conveniently located under the lower air cleaner housing, making it accessible for any DIY enthusiast. You can have this job done in under an hour.
- Safety First: Before you begin, disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts and to help reset the system.
- Locate the Module: Open the hood and find the air cleaner box assembly. The TCM is situated directly underneath it.
- Access the TCM: Remove the air cleaner housing. This typically involves loosening a few clamps and bolts. Set it aside carefully.
- Disconnect and Remove: With the TCM exposed, carefully unplug the electrical connectors. Press the release tabs firmly to avoid damaging them. Then, unbolt the module from its mounting bracket.
- Install the New Module: Bolt your new, pre-programmed TCM into place. Reconnect the electrical connectors, ensuring they click securely into position.
- Reassemble and Finalize: Reinstall the air cleaner housing. Reconnect the negative battery terminal. It’s a good practice to use a scan tool to clear any stored DTCs, but the primary issues should be resolved by the new module.
Verified Vehicle Compatibility List
This module is a direct fit for the 2006-2007 Chevrolet Monte Carlo and is also compatible with a wide range of other GM vehicles. Please verify your vehicle is on this list to ensure proper fitment.
This part will fit these makes and models with these options:
MONTE CARLO 06-07 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)
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)
MALIBU 06-10 Transmission; (LH frame rail)
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)
SATURN VUE 07-10 Transmission
SAVANA VANS 06-14 Transmission; (RH engine compartment)
SIERRA & SILVERADO TRUCKS 07-13 Transmission; (next to battery)
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)
YUKON & YUKON XL 07-09 Transmission; (next to battery)
Frequently Asked Questions
Do I need to get this module programmed by a dealer?
No. We pre-program the module to your vehicle’s VIN before shipping. This makes it a plug-and-play part, saving you the time and expense of a dealership visit.
Is this a difficult part to install myself?
Not at all. For the Monte Carlo, it’s located under the air cleaner box and is accessible with basic hand tools. Most DIY mechanics can complete the swap in under an hour.
What does ‘no core charge’ mean?
It means you don’t have to pay an extra deposit or worry about sending your old, faulty part back to us. You can keep it or dispose of it at your convenience.
Will this fix a P0700 check engine light code?
Yes, in many cases. The P0700 code is a general fault request from the TCM. If the TCM itself is the source of the problem, replacing it with this programmed unit will resolve the code and the underlying issue.
What kind of warranty comes with this part?
This module is backed by our one-year warranty, giving you peace of mind that you’re installing a quality, reliable part built to OEM standards.