Restore Peak Performance to Your Truck’s Transmission
Is your 2008-2012 Chevrolet Colorado suffering from erratic shifting, getting stuck in gear, or throwing transmission-related check engine light codes? These are classic signs of a failing Transmission Control Module (TCM). The TCM is the electronic brain of your automatic transmission, responsible for orchestrating smooth gear changes, managing torque converter lockup, and ensuring overall drivetrain efficiency. When it fails, it can lead to poor performance, decreased fuel economy, and potentially catastrophic transmission damage if left unaddressed. This OEM-quality T42 TCM, service part number 24238856, is the definitive solution to restore your truck’s factory performance and reliability.
From the Diagnostic Bay
We had a 2010 Colorado come into the shop with a classic complaint: harsh 1-2 shifts and occasionally getting stuck in 3rd gear (limp mode). The owner had already spent a small fortune replacing shift solenoids based on a generic code reader’s output, but the problem persisted. After hooking up our professional scan tool, we saw communication errors pointing directly to the TCM. The internal circuitry had failed. We installed one of our VIN-programmed T42 modules, cleared the adaptive learn tables, and the truck was shifting like new in under an hour. It’s a common story: don’t just chase the codes, diagnose the source. A faulty TCM is often the root cause of multiple solenoid codes.
Is Your Colorado Exhibiting These TCM Failure Symptoms?
- ✔️ Harsh, slamming, or delayed gear shifts.
- ✔️ The vehicle is stuck in a single gear, often called “limp mode.”
- ✔️ An illuminated Check Engine Light or Transmission Warning Light.
- ✔️ Diagnostic Trouble Codes (DTCs) such as P0700, P0750, or other solenoid-specific codes.
- ✔️ Inability to upshift or downshift properly as you accelerate or decelerate.
- ✔️ A noticeable drop in fuel efficiency.
- ✔️ The transmission seems to slip out of gear unexpectedly.
Why Choose Our Colorado Transmission Control Module?
This isn’t just a replacement part; it’s a complete, ready-to-install solution. The most significant benefit is our professional VIN programming service. When you order, we flash the module with your vehicle’s specific Vehicle Identification Number and the latest GM software updates. This critical step ensures that the TCM communicates flawlessly with your truck’s Engine Control Unit (ECU) and other onboard systems right out of the box. You get optimal shift points, correct torque converter strategy, and resolved communication errors without needing an expensive trip to the dealership for programming.
Simple, Direct-Fit Installation
Engineered to meet or exceed original equipment specifications, this module is a direct replacement for part number 24238856 and other interchangeable numbers. For the 2008-2012 Chevrolet Colorado and GMC Canyon, the TCM is typically located in the right-hand rear of the engine compartment. The installation is straightforward for a DIY mechanic or professional technician:
- Safety First: Disconnect the negative battery terminal to prevent electrical shorts and reset the vehicle’s computer systems.
- Locate and Remove: Find the old TCM, carefully disconnect the electrical harnesses, and unbolt it from its mounting bracket.
- Install New Module: Bolt the new, pre-programmed TCM into place and securely reconnect the electrical connectors.
- Final Steps: Reconnect the battery terminal. While our programming handles the critical setup, it’s always a good practice to use a scan tool to clear any stored DTCs from the system.
With no core charge, you can complete the repair without the hassle of returning your old, faulty part. This is the most efficient and cost-effective way to get your Colorado back to dependable working order.
Frequently Asked Questions
Do I need to have this module programmed by a dealer?
No. This Transmission Control Module comes pre-programmed to your vehicle’s specific VIN. This means it is ready for plug-and-play installation, saving you the time and expense of a dealership visit for programming.
Where is the TCM located on my 2009 Chevy Colorado?
On the 2008-2012 Chevrolet Colorado and its sibling, the GMC Canyon, the TCM is typically found in the engine bay, on the right-hand (passenger) side, toward the rear of the compartment.
Can a bad TCM cause my transmission to feel like it’s slipping?
Absolutely. A failing TCM can send incorrect signals for hydraulic pressure or to the shift solenoids, resulting in symptoms that feel exactly like a mechanical slip, such as delayed engagement or a flare in RPMs between shifts.
Is this part compatible with other GM vehicles?
Yes, this T42 TCM is compatible with a wide range of GM vehicles from approximately 2006-2014 that use 4-speed automatic transmissions like the 4L60E and 4L65E. Please verify your part number or use our vehicle fitment tool to ensure compatibility.
What is the warranty on this part?
This module is backed by a one-year warranty, giving you peace of mind and assurance in the quality and durability of your repair.