Is your 2007-2008 Chevrolet Suburban 1500 acting up? If you’re dealing with frustratingly harsh shifts, a transmission that refuses to shift, or the dreaded check engine light, you’re likely facing a failing Transmission Control Module (TCM). As a technician with over two decades of experience, I’ve seen this exact issue countless times. The TCM is the electronic brain of your automatic transmission, and when it fails, it can make your reliable SUV feel unpredictable and unsafe. This is a direct, OEM-quality replacement T42 TCM, part number 24252114, designed to solve those problems for good.
The biggest headache with replacing electronic modules has always been the expensive and time-consuming trip to the dealership for programming. We eliminate that completely. Before this module ships, we program it to your Suburban’s specific Vehicle Identification Number (VIN). This means it arrives at your door ready for a true plug-and-play installation. You get a part that communicates flawlessly with your vehicle’s other systems, restoring the smooth, precise shifting you expect from your truck, all without paying for dealer-specific software or labor.
Case Study: A Tricky Diagnosis
A customer brought in their ’08 Suburban 1500 last month. It was stuck in 3rd gear (limp mode) and had a P0700 code. They’d been to another shop that wanted to do a full transmission rebuild for thousands. I hooked up my scan tool and saw erratic data from the shift solenoids. Based on my experience with these GM trucks, I suspected the TCM was the real culprit, not the internal transmission components. We ordered one of these VIN-programmed modules, I installed it in about 20 minutes right there in the parking lot, cleared the codes, and the truck shifted perfectly. The customer saved a fortune and drove away in a vehicle that felt brand new.
Is Your Suburban Showing These Telltale Signs?
A failing TCM isn’t always obvious, but it leaves clues. If you’re experiencing any of the following, this module is the likely solution for your 2007-2008 Suburban 1500 TCM problems:
- ✔ Harsh, slamming shifts or delayed gear engagement.
- ✔ 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) stored, such as P0700 (Transmission Control System Malfunction), P0750-series (Shift Solenoid), or other communication codes.
- ✔ A sudden drop in fuel economy or the transmission overheating.
- ✔ Complete loss of communication with the transmission.
Your 30-Minute Path to a Smooth Ride
This is a repair that a confident DIYer or any professional mechanic can handle with basic tools. For the 2007-2008 Suburban 1500, the TCM is conveniently located in the engine bay, typically next to the battery.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electronic repair.
- Locate the Module: Find the TCM mounted next to the battery in your Suburban’s engine compartment.
- Disconnect and Remove: Carefully unplug the electrical connectors. Be gentle with the locking tabs. Then, unbolt the module from its mounting bracket.
- Install the New TCM: Mount the new, pre-programmed module in place and securely fasten the bolts. Reconnect the electrical harnesses until they click.
- Final Steps: Reconnect the battery terminal. While our programming handles the critical setup, it’s good practice to use a basic OBD2 scanner to clear any lingering fault codes from the vehicle’s memory.
Verified Fitment for Your General Motors Vehicle
This T42 TCM, service part 24252114, is a direct fit for the 2007-2008 Chevrolet Suburban 1500. It is also compatible with a wide range of other GM vehicles equipped with 4-speed automatic transmissions like the 4L60E, 4L65E, and 4L70E. It interchanges with numerous part numbers, including 24234503, 24242391, 24230461, 24256960, and more, ensuring broad compatibility. If your old module has one of these numbers, this part will work for you.
Frequently Asked Questions
Do I need to take this part to a dealer for programming?
No. This is the key benefit of our service. We pre-program the module to your vehicle’s VIN before shipping. It arrives ready to install, saving you hundreds in dealership fees and time.
Where is the TCM located on my 2007-2008 Suburban 1500?
On the 2007-2008 Suburban 1500, the Transmission Control Module is located in the engine compartment, mounted right next to the battery. This makes it very accessible for a quick replacement.
Is this part difficult to install myself?
Not at all. With basic hand tools, most people can complete the installation in under 30 minutes. Since it’s pre-programmed, there are no complicated software steps involved.
What if my old part number is slightly different?
This module (24252114) is a service replacement for many earlier part numbers like 24234503, 24242391, and others. As long as your vehicle is on the compatibility list, this module will function correctly, loaded with the latest GM software for your VIN.
Is there a core charge?
No, there is no core charge for this part. You can keep your old module without the hassle of returning it.