If your 2007 or 2008 Chevrolet Suburban 1500 is suffering from erratic shifting, getting stuck in gear, or throwing transmission codes, you’re not alone. As a technician with over two decades of experience, I’ve seen countless GM trucks and SUVs come into the bay with these exact issues. More often than not, the culprit isn’t a catastrophic transmission failure, but a faulty Transmission Control Module (TCM). This VIN-programmed T42 TCM, part number 24243901, is the reliable, straightforward solution to restore your vehicle’s performance and get you back on the road with confidence.
This isn’t just a replacement part; it’s a complete fix. We pre-program the module to your vehicle’s specific VIN before shipping. This critical step ensures it communicates flawlessly with your engine computer (ECM) and other vehicle systems right out of the box. You get to skip the expensive and time-consuming trip to the dealership for programming, making this an ideal solution for both savvy DIYers and professional repair shops looking to deliver efficient, dependable service.
From the Diagnostic Bay: The Misleading P0700 Code
A customer recently brought in their ’08 Suburban 1500. The check engine light was on, and the transmission was shifting hard from first to second and sometimes wouldn’t shift at all. The generic P0700 code was present, which simply means the TCM has requested the check engine light. Digging deeper with a proper scan tool, we found specific solenoid circuit codes. While this might lead some to start replacing solenoids inside the pan—a messy and often unnecessary job—experience points to the TCM itself. These T42 modules are known for internal circuit failures that create false solenoid codes. We swapped in a VIN-programmed module, and in under 30 minutes, the truck was shifting like new. The codes were gone, and the customer avoided a much more expensive and invasive repair.
Is Your Suburban Showing These Telltale Signs?
A failing TCM can manifest in several ways. If you’re experiencing any of the following, it’s a strong indicator that your module needs attention. This 2007-2008 Suburban 1500 TCM is designed to resolve these exact problems.
- ✔ Harsh, delayed, or unpredictable gear shifts.
- ✔ Vehicle is stuck in “limp mode” (usually second or third gear).
- ✔ Check Engine Light or Transmission Warning Light is illuminated.
- ✔ Diagnostic Trouble Codes (DTCs) are present, such as P0700, P0750, P0753, P0758, or other solenoid-related faults.
- ✔ Poor fuel economy due to incorrect gear selection or torque converter lock-up issues.
- ✔ Complete loss of communication with the TCM, leading to a no-shift condition.
Simple Installation to Get You Moving Again
One of the best features of this module is its ease of installation. You don’t need a vehicle lift or specialized transmission tools. For most GMT900 platform vehicles like your Suburban, the process is quick and accessible.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent electrical shorts and help reset the system.
- Locate the TCM: On your 2007-2008 Suburban 1500, the TCM is typically located in the engine compartment, right next to the battery.
- Disconnect and Remove: Carefully unclip the electrical connectors from the old module. Then, unbolt the module from its mounting bracket.
- Install the New Module: Bolt the new, pre-programmed TCM into place and securely reconnect the electrical connectors. You’ll hear a click as they lock in.
- Final Steps: Reconnect the battery terminal. Start the vehicle and use a standard OBD2 scan tool to clear any stored fault codes. Take the vehicle for a test drive to confirm smooth shifting.
Solving Transmission Problems with a Reliable 2007-2008 Suburban 1500 TCM
This module is built to meet or exceed original equipment standards, ensuring long-lasting durability. It directly replaces a wide range of part numbers, including 24243901, 24252114, 24234503, and more, making it a versatile fix for many GM vehicles. With our VIN programming service and a one-year warranty, you can purchase with the assurance that you’re getting a quality part that’s ready to perform.
Verified Fitment for Your General Motors Vehicle
While this page focuses on the Suburban, this T42 TCM is compatible with a wide array of GM vehicles equipped with 4-speed automatic transmissions like the 4L60E, 4L65E, and 4L70E. Please verify your specific model and year below.
This part fits the following (and more):
- Chevrolet Suburban 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: 2007-2008 (Transmission; next to battery)
- GMC Sierra 1500: 2007-2013 (Transmission; next to battery)
- Chevrolet Avalanche 1500: 2007-2008 (Transmission; next to battery)
- Cadillac DTS: 2006-2011 (Transmission; RH front engine compartment)
- Hummer H3: 2008-2010 (Transmission; RH rear engine compartment)
- …and many other GM cars, trucks, and SUVs from 2006-2014.
Frequently Asked Questions
Do I need to take my vehicle to the dealer after installation?
No. This module comes pre-programmed to your vehicle’s VIN. It is a true plug-and-play solution, and no further programming or dealership visits are required.
What is a T42 TCM?
The T42 is the specific controller generation used by General Motors for many of its 4-speed automatic transmissions from the mid-2000s to the early 2010s. It’s the electronic brain that controls all shifting, torque converter clutch operation, and pressure regulation.
Is a core charge required?
No, there is no core charge for this part. You can keep your old module without any penalty, making the process simpler and more affordable.
Will this fix a transmission that is slipping?
It depends on the cause. If the slipping is due to incorrect line pressure commands or faulty solenoid signals from a bad TCM, then yes, this module can resolve it. However, if the slipping is caused by worn-out internal mechanical parts like clutches or bands, the transmission will require a mechanical rebuild. A proper diagnosis is key.
How do I provide my VIN for programming?
You will be prompted to enter your 17-digit Vehicle Identification Number (VIN) during the checkout process. Please double-check it for accuracy to ensure perfect programming.