Restore Smooth Shifting to Your Chevy Suburban
If your 2007 or 2008 Chevrolet Suburban 1500 is experiencing harsh shifting, getting stuck in gear, or throwing transmission codes, the culprit is often a failing Transmission Control Module (TCM). As a technician with over two decades of experience, I’ve seen how a faulty TCM can sideline a perfectly good family vehicle. This isn’t just an annoyance; erratic transmission behavior is a safety concern. This OEM-quality T42 Transmission Control Module, part number 24234503, is the definitive solution to restore your vehicle’s performance and your peace of mind.
The core of the problem with these modules is often internal circuit failure from years of heat cycles and vibration. This leads to miscommunication between the engine and the transmission, causing the drivability issues you’re feeling. Our 2007-2008 Suburban 1500 TCM is pre-programmed to your vehicle’s specific VIN, eliminating the need for expensive dealership visits or specialized scan tools for setup. It arrives ready for a true plug-and-play installation, making it a manageable job for a DIY enthusiast or a quick, profitable repair for a professional shop.
Case Study: A Tricky Diagnosis
A customer brought in their ’07 Suburban stuck in limp mode (3rd gear only) with a P0700 code. They were told they needed a full transmission rebuild costing thousands. After a quick scan, I noticed several solenoid circuit codes that were intermittent. Instead of tearing down the transmission, I checked the TCM. In my shop, I’ve diagnosed hundreds of these T42 module failures. We installed one of our VIN-programmed modules, cleared the codes, and the vehicle shifted perfectly. The customer saved a fortune and was back on the road in under an hour. This is the most common failure point for these symptoms.
Is Your Suburban Showing These Transmission Trouble Signs?
A failing TCM will broadcast its issues through poor performance. If you’re noticing any of the following, it’s time to inspect your module. A new 2007-2008 Suburban 1500 TCM is the most reliable way to solve these problems for good.
- ✔ Harsh, banging shifts or delayed gear engagement.
- ✔ The vehicle is stuck in one gear, often called “limp mode.”
- ✔ Check Engine Light is on with transmission-related Diagnostic Trouble Codes (DTCs) like P0700, P0750, P0753, P0758, etc.
- ✔ Inability to upshift or downshift properly as you accelerate or slow down.
- ✔ Noticeable decrease in fuel economy.
- ✔ The transmission seems to slip out of gear unexpectedly.
A Straightforward Guide to Your TCM Installation
Replacing the TCM on your Suburban is a simple process that typically takes less than 30 minutes with basic hand tools. On this model, it’s conveniently located right next to the battery in the engine compartment.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts and to help reset the system.
- Locate the Module: Find the TCM mounted next to the battery. It’s a silver box with several large electrical connectors.
- Disconnect and Remove: Carefully unclip the wiring harnesses. They have locking tabs, so don’t force them. Then, unbolt the module from its mounting bracket.
- Install the New Module: Bolt the new, VIN-programmed TCM into place. Securely reconnect the wiring harnesses, ensuring they click into place.
- Final Steps: Reconnect the negative battery terminal. Start the vehicle and let it run for a few minutes. While not always necessary, using a basic scan tool to clear any stored fault codes is a good final practice.
Verified Vehicle Compatibility List
This T42 TCM is a direct-fit replacement for a wide range of General Motors vehicles equipped with 4-speed automatic transmissions like the 4L60E, 4L65E, and 4L70E. While this page focuses on the 2007-2008 Suburban 1500 TCM, it is also compatible with the following models. Please verify your part number (24234503) or contact us with your VIN.
- Chevrolet Suburban 1500 (2007-2008) – Located next to battery
- Chevrolet Silverado & GMC Sierra 1500/2500 (2007-2013) – Located next to battery
- Chevrolet Tahoe & GMC Yukon (2007-2009) – Located next to battery
- Chevrolet Express & GMC Savana Vans (2006-2014) – Located in RH engine compartment
- Chevrolet Impala (2006-2011) – Located under air cleaner housing
- Cadillac DTS (2006-2011) – Located in RH front engine compartment
- Hummer H3 (2008-2010) – Located in RH rear engine compartment
- …and many other GM cars, trucks, and SUVs from 2006-2014.
Do I need to take this part to a dealer for programming?
Do I need to take this part to a dealer for programming?
No. This module comes fully programmed to your vehicle’s VIN before it ships. It is a plug-and-play solution that requires no additional programming or setup. Just provide your VIN at checkout.
What is a T42 TCM?
The T42 is the specific hardware platform used by General Motors for the transmission control module in a wide range of its 4-speed automatic vehicles from the mid-2000s to the mid-2010s. This part is a direct replacement for the original T42 controller.
Is there a core charge for my old part?
No, there is no core charge. You are not required to send your old, faulty module back to us, saving you time and shipping costs.
Will this fix a P0700 trouble code?
In many cases, yes. A P0700 code is a generic fault request from the TCM to the main engine computer (ECM) to turn on the check engine light. A failing TCM is a very common cause of this code, along with more specific transmission codes. Replacing the module often resolves the root cause.