Restore Crisp, Reliable Shifting to Your Chevy Colorado
If your 2008-2012 Chevrolet Colorado is suffering from harsh shifts, getting stuck in gear, or throwing transmission-related error codes, the problem often points directly to a failing Transmission Control Module (TCM). As a seasoned technician, I’ve seen firsthand how a faulty TCM can cripple an otherwise reliable truck. It’s the electronic brain of your automatic transmission, and when it malfunctions, it creates frustrating and potentially unsafe driving conditions. This OEM-quality T42 TCM, part number 24243921, is the definitive solution, arriving pre-programmed to your truck’s specific VIN for a true plug-and-play repair.
From the Diagnostic Bay: The Misleading Solenoid Code
A customer brought in a 2011 Colorado with a classic complaint: intermittent, bone-jarring shifts from 1st to 2nd gear and occasionally getting stuck in 3rd (limp mode). The dash was lit up with a P0752 code, pointing to a stuck shift solenoid. Another shop had quoted him for a full solenoid pack replacement—a costly, transmission-pan-off job. However, with over 20 years of experience, I know that on these GM platforms, the TCM itself is a common point of failure. After confirming the solenoid’s resistance was within spec, we installed one of our VIN-programmed TCMs. The problem vanished instantly. The original TCM had a failing driver circuit that couldn’t properly command the solenoid, leading to the misleading code. This replacement saved the customer over $500 and hours of unnecessary labor.
Is Your Colorado Exhibiting These Telltale TCM Failure Signs?
A failing TCM doesn’t always mean a complete transmission breakdown. Often, the signs are electronic and intermittent. If you’re experiencing any of the following, a faulty TCM is the likely culprit:
- ✔ Harsh, slamming, or delayed gear engagement.
- ✔ The truck refuses to shift out of a single gear (often called ‘limp mode’).
- ✔ Check Engine Light is on with Diagnostic Trouble Codes (DTCs) like P0700, P0750, P0752, or other solenoid-related faults.
- ✔ Sudden loss of power or poor acceleration as the transmission fails to downshift.
- ✔ A noticeable drop in fuel economy due to inefficient shifting.
- ✔ Communication errors with the transmission when read by a scan tool.
The Advantage of a Pre-Programmed Solution
The biggest hurdle in replacing a modern electronic module is programming. Our service eliminates that completely. We flash this 2008-2012 Colorado Transmission Control Module with your vehicle’s unique VIN and the latest GM software updates before it ships. This ensures perfect communication with your truck’s Engine Control Module (ECM) and other systems right out of the box. You get restored performance without the added time and expense of a dealership visit for programming.
DIY Installation: Get Your Colorado Shifting Smoothly in Minutes
This is a repair most DIYers can handle with basic tools. For the 2008-2012 Colorado, the TCM is conveniently located in the engine bay, making access straightforward.
- Safety First: Disconnect the negative terminal from your truck’s battery to prevent any electrical shorts and to help reset the vehicle’s computer systems.
- Locate the Module: On the Colorado, the TCM is typically found in the right-hand rear of the engine compartment. It’s a silver box with electrical connectors.
- Disconnect and Remove: Carefully unclip the wiring harnesses. Then, unbolt the module from its mounting bracket. There are typically just a few bolts holding it in place.
- Install the New TCM: Mount the new, pre-programmed module in the same location and securely fasten the bolts. Reconnect the wiring harnesses, making sure they click firmly into place.
- Final Steps: Reconnect the battery terminal. While our programming resolves most issues, it’s good practice to use a basic OBD-II scan tool to clear any stored fault codes from the previous failure. Start the truck and enjoy smooth shifting!
Verified Fitment for Your Vehicle
This module is a direct replacement for part number 24243921 and other interchangeable numbers listed below. It is guaranteed to fit the following models:
- Chevrolet Colorado: 2008, 2009, 2010, 2011, 2012 (Transmission; RH rear engine compartment)
- GMC Canyon: 2008, 2009, 2010, 2011, 2012 (Transmission; RH rear engine compartment)
- Hummer H3: 2008, 2009, 2010 (Transmission; RH rear engine compartment)
- This T42 module also fits a wide range of other GM vehicles. Please verify your part number or contact us for fitment confirmation.
- Frequently Asked Questions
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Do I need to have this module programmed by a dealer?
No. We program the module to your vehicle’s VIN before shipping. It arrives ready for a simple, plug-and-play installation, saving you time and money.
What is a core charge?
A core charge is a deposit you pay until you return your old part. We do not have a core charge on this item, so you can keep your old module without any hassle.
Where is the TCM located on my 2010 Colorado?
On the 2008-2012 Chevrolet Colorado and GMC Canyon, the Transmission Control Module is located in the engine bay, on the right-hand (passenger) side, towards the rear firewall.
Will this fix a P0700 trouble code?
A P0700 code is a general transmission fault request from the TCM to the ECM to turn on the check engine light. While this module often resolves the underlying issue causing the P0700, it’s important to scan for more specific codes (like P07xx) to confirm the diagnosis.
What kind of warranty is included?
This module is backed by our standard one-year, hassle-free warranty, giving you peace of mind for your repair.