Is your 2007 or 2008 Chevy Suburban 1500 suffering from frustrating transmission problems? If you’re dealing with harsh, delayed shifting, or your truck is stuck in limp mode, a failing Transmission Control Module (TCM) is the most likely culprit. As the central computer for your 4L60E or 4L70E automatic transmission, a faulty TCM can make your reliable SUV feel unpredictable and unsafe. This VIN-programmed T42 TCM, part number 24239224, is the definitive solution to restore your vehicle’s performance and your peace of mind.
Over my 20+ years in automotive diagnostics, I’ve seen countless GM trucks and SUVs come into the shop with what owners feared was a catastrophic transmission failure. More often than not, the root cause was a problematic TCM. This module is responsible for interpreting data from various sensors to command precise shifts, control line pressure, and manage torque converter lockup. When it fails, the symptoms can be dramatic, but the fix is surprisingly straightforward with the right part.
A Technician’s Notebook
I remember a customer with a 2008 Suburban 1500 who was ready to sell it for cheap. The truck would randomly refuse to shift out of 2nd gear, and the check engine light was on with a P0700 code. He’d been quoted thousands for a transmission rebuild. I hooked up my professional scan tool and saw erratic data from the TCM and a history of solenoid circuit codes. Instead of a rebuild, we installed one of these pre-programmed T42 modules. The total repair time was under an hour, including clearing the codes. The customer called me a week later, thrilled that his Suburban drove like new again. It’s a classic case where replacing the brain, not the muscle, solves the problem.
Is Your Suburban Showing These Warning Signs?
- ✔️ Harsh, banging shifts or delayed gear engagement.
- ✔️ Vehicle is stuck in a single gear (often called “limp mode”).
- ✔️ Check Engine Light or Transmission Warning Light is illuminated.
- ✔️ Diagnostic Trouble Codes (DTCs) are present, such as P0700, P0750, or other solenoid-related faults.
- ✔️ A noticeable drop in fuel economy due to inefficient shifting.
- ✔️ Complete loss of communication with the TCM, preventing diagnostics.
The Definitive Solution: A Pre-Programmed 2007-2008 Suburban 1500 Transmission Control Module
The biggest hurdle in replacing a modern vehicle module is the need for dealership-level programming. We eliminate that step entirely. By providing us with your vehicle’s VIN during checkout, we program the module with the latest GM software specific to your Suburban. This ensures it communicates flawlessly with the Engine Control Module (ECM) and other systems right out of the box. It’s a true plug-and-play fix that saves you time, money, and a trip to the dealer.
DIY-Friendly Installation in Under 30 Minutes
- ✔ Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts and to help reset the onboard systems.
- ✔ Locate the Module: On your 2007-2008 Suburban 1500, the TCM is conveniently located in the engine compartment, right next to the battery.
- ✔ Disconnect and Remove: Carefully unplug the electrical connectors from the old TCM. Then, unbolt the module from its mounting bracket.
- ✔ Install the New Module: Mount your new, pre-programmed TCM in place and securely reconnect the electrical connectors. You’ll hear a click as they lock in.
- ✔ Final Steps: Reconnect the battery terminal. While the module is plug-and-play, it’s best practice to use a basic OBD2 scan tool to clear any stored transmission codes to ensure a clean slate for the new module.
Verified Fitment for Your GM Vehicle
This T42 TCM is a direct replacement for part number 24239224 and is compatible with a wide range of GM vehicles equipped with 4-speed automatic transmissions. While this page is dedicated to the 2007-2008 Suburban 1500 Transmission Control Module, it also fits many other models. Please verify your vehicle in the list below:
- Chevrolet Suburban 1500 (2007-2008): Transmission; (next to battery)
- Chevrolet Avalanche 1500 (2007-2008): Transmission; (next to battery)
- Chevrolet Silverado 1500 (2007-2013): Transmission; (next to battery)
- Chevrolet Tahoe (2007-2009): Transmission; (next to battery)
- GMC Yukon / Yukon XL 1500 (2007-2009): Transmission; (next to battery)
- GMC Sierra 1500 (2007-2013): Transmission; (next to battery)
- And many more GM cars, trucks, and SUVs from 2006-2014.
What does a VIN-programmed TCM mean?
What does a VIN-programmed TCM mean?
It means we load the module with your vehicle’s specific factory software using your 17-digit Vehicle Identification Number (VIN). This ensures the TCM works perfectly with your engine and other systems, just like the original part, without requiring any additional programming from a dealership.
Do I need to take my Suburban to the dealer after installation?
No. Because this module is pre-programmed to your VIN, you can install it yourself or have your local mechanic do it. This completely eliminates the need for an expensive trip to the dealership for programming.
Where is the TCM located on my 2007-2008 Suburban 1500?
For this specific model and year range, the Transmission Control Module is located in the engine bay, mounted next to the vehicle’s battery. This makes it very easy to access for replacement.
Will this fix a P0700 diagnostic trouble code?
A P0700 code is a general fault code indicating the TCM has detected a problem. Often, replacing a faulty TCM will resolve the P0700 and any related specific codes (like for solenoids). However, you should always ensure the transmission’s internal components and wiring are in good condition.
Is there a core charge for my old part?
No, there is no core charge required for this module. You can keep your old part or recycle it locally without the hassle of shipping it back to us.