If your 2008-2012 Chevrolet Colorado is suffering from erratic shifting, getting stuck in gear, or throwing transmission-related trouble codes, you’ve likely pinpointed a failing Transmission Control Module (TCM). As a technician with over two decades of experience, I’ve seen countless GM trucks sidelined by these exact issues. This isn’t just an annoyance; it’s a critical failure that compromises your truck’s performance and reliability. This OEM-quality T42 TCM, part number 24241806, is the definitive, hassle-free solution to restore your transmission’s precise operation.
The biggest hurdle with electronic module replacement has always been the expensive and time-consuming trip to the dealership for programming. We eliminate that step entirely. By providing your vehicle’s VIN during checkout, we program the module specifically for your Colorado. It arrives at your door ready for a true plug-and-play installation, pre-loaded with the latest GM software updates to ensure perfect communication between your engine and transmission.
Case Study: A Tricky Diagnosis
A customer brought in his 2010 Colorado complaining of intermittent ‘limp mode’—it would get stuck in 3rd gear without warning, but only after driving for 20+ minutes. No check engine light was on, but a deep scan revealed a stored history code, P0700 (Transmission Control System Malfunction). After checking the wiring harness and solenoids, which all tested fine, we suspected the TCM. Heat soak was causing an internal fault in the module. We installed one of our VIN-programmed TCMs, and the problem was solved instantly. This is a classic failure mode I’ve diagnosed on hundreds of GM vehicles; the module’s internal logic breaks down under normal operating temperatures.
Is Your Colorado Exhibiting These Telltale Signs?
A faulty TCM can manifest in several ways. If you’re experiencing any of the following, this module is your likely solution:
- ✔ Harsh, delayed, or slamming gear shifts.
- ✔ The truck refuses to shift out of a single gear (often 2nd or 3rd).
- ✔ An illuminated Check Engine Light or Transmission Warning Light.
- ✔ Diagnostic Trouble Codes (DTCs) such as P0700, P0750, or other solenoid-related faults.
- ✔ A sudden and unexplained drop in fuel economy.
- ✔ The transmission seems to slip between gears or fails to engage from Park.
Your Step-by-Step Guide to a Quick Install
You don’t need to be a master mechanic to complete this job. With basic tools, you can have your Colorado back on the road in under 30 minutes.
- Safety First: Disconnect the negative terminal from your truck’s battery to prevent any electrical shorts and to help reset the system.
- Locate the Module: On your 2008-2012 Colorado, the TCM is located in the engine bay, on the right-hand (passenger) side at the rear of the compartment.
- Disconnect and Remove: Carefully unplug the electrical connectors. Note the locking tabs to avoid damage. Then, unbolt the old module from its mounting bracket.
- Install the New TCM: Mount your new, pre-programmed module in place and securely fasten the bolts. Re-connect the electrical harnesses until they click firmly into place.
- Final Steps: Reconnect the battery terminal. While the module is plug-and-play, it’s good practice to use a basic scan tool to clear any lingering fault codes from the vehicle’s memory.
Verified Vehicle Compatibility
This T42 Transmission Control Module is a direct replacement for part number 24241806 and other interchangeable numbers. It fits the following vehicles (note location):
- Chevrolet Colorado (2008-2012): Transmission; (RH rear engine compartment)
- GMC Canyon (2008-2012): Transmission; (RH rear engine compartment)
- Hummer H3 (2008-2010): Transmission; (RH rear engine compartment)
- Chevrolet & GMC Full-Size Trucks/SUVs (2007-2013): (e.g., Silverado, Sierra, Tahoe, Yukon) Transmission; (next to battery)
- Chevrolet & GMC Full-Size Vans (2006-2014): (e.g., Express, Savana) Transmission; (RH engine compartment)
- …and many other GM cars, trucks, and SUVs from 2006-2014. Please verify your part number.
Frequently Asked Questions
Do I really need to provide my VIN?
Yes. Providing your VIN is essential. We use it to load the correct GM-certified software for your specific vehicle configuration. This step ensures 100% compatibility and prevents performance issues, making the installation truly plug-and-play.
Will this fix a P0700 trouble code?
In many cases, yes. A P0700 code is a general fault request from the TCM to the main computer (ECM) to turn on the check engine light. A failing TCM is one of the most common root causes for this code. Replacing the module often resolves the underlying issue that triggered the P0700.
Is there a core charge for my old part?
No, there is absolutely no core charge. You can keep your old module or dispose of it at your convenience. We want to make your repair as simple and straightforward as possible.
What is the warranty on this 2008-2012 Colorado TCM?
This module is backed by our comprehensive one-year, unlimited mileage warranty. We stand behind the quality and reliability of our parts, giving you peace of mind with your purchase.
Can I install this myself if I’m not a professional mechanic?
Absolutely. This repair is very popular among DIY enthusiasts. Because the module comes pre-programmed, you eliminate the most complex part of the job. With basic hand tools and our installation guide, most people can complete the swap in under half an hour.