Is your 2007-2008 Chevrolet Suburban 1500 suffering from unpredictable shifting, getting stuck in gear, or throwing transmission codes? These are classic signs of a failing Transmission Control Module (TCM). As the electronic brain of your 4L60E or 4L65E automatic transmission, a faulty TCM can cripple your SUV’s performance and reliability. This OEM-quality T42 TCM, part number 24235340, is the definitive solution, arriving pre-programmed to your vehicle’s specific VIN for a true plug-and-play repair.
Forget about expensive dealership visits and programming fees. We handle the complex part for you. By programming the module with the latest GM software updates before it ships, we ensure it communicates flawlessly with your vehicle’s engine computer and other systems right out of the box. This restores the precise electronic control over shift points, torque converter lockup, and line pressure that your Suburban needs to run smoothly and efficiently.
Case Study: A Tricky Diagnosis
I remember a 2008 Suburban 1500 that came into my shop with a frustratingly intermittent problem. The owner complained of random, harsh 1-2 shifts and occasional refusal to shift out of 3rd gear, but with no consistent check engine light. We checked the fluid, scanned for codes (only a generic P0700 history code), and inspected the wiring harness. Everything seemed fine. On a hunch, we monitored the TCM data stream during a long test drive. We finally caught it: the module was momentarily dropping communication, causing the erratic behavior. These T42 modules are known for internal solder joint failures from years of heat cycles. Replacing it with a pre-programmed unit like this one solved the problem instantly, saving the customer from a potential transmission rebuild.
Is Your Suburban Exhibiting These Telltale Signs?
A failing TCM doesn’t always mean total failure. Often, the symptoms start small and get worse. If you’re experiencing any of the following, it’s time to inspect your TCM:
- ✔ Harsh, banging, or delayed gear shifts.
- ✔ The vehicle is stuck in “limp mode” (usually 2nd or 3rd gear).
- ✔ An illuminated Check Engine Light or Transmission Warning Light.
- ✔ Diagnostic Trouble Codes (DTCs) such as P0700, P0750, P0753, P0758, or other solenoid-related faults.
- ✔ Inability to upshift or downshift properly.
- ✔ A noticeable drop in fuel economy.
- ✔ The transmission seems to be slipping between gears.
A Straightforward Guide to Installation
One of the best features of this module is its simple, DIY-friendly installation. For the 2007-2008 Suburban 1500, the TCM is conveniently located in the engine bay, making the job quick and easy. You can have your truck back to normal 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 system.
- Locate the Module: On your Suburban, you’ll typically find the TCM mounted right next to the battery in the engine compartment.
- Disconnect and Remove: Carefully unplug 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. Ensure they click into place.
- Final Steps: Reconnect the negative battery terminal. While our programming handles the critical setup, it’s always a good practice to use a basic OBD2 scan tool to clear any stored fault codes from the vehicle’s memory.
Will This Fit My Vehicle?
This T42 Transmission Control Module is a direct-fit replacement for the 2007-2008 Suburban 1500 TCM and is also compatible with a wide array of other GM cars, trucks, and SUVs from 2006-2014 equipped with 4-speed automatic transmissions like the 4L60E, 4L65E, and 4L70E. It is an interchangeable replacement for numerous part numbers, including 24235340, 24242391, 24252114, 24234503, and more. If your vehicle is on the list below and exhibits TCM failure symptoms, this is the reliable fix you need.
Frequently Asked Questions
Do I need to do any programming or flashing after installation?
No. This module comes fully pre-programmed to your Suburban’s VIN. It is ready for installation right out of the box, with no need for a trip to the dealer or a special scan tool.
Is there a core charge for my old part?
No, there is no core charge. You can keep your old module or dispose of it without the hassle of sending it back.
What kind of warranty is included?
This module is backed by our one-year, hassle-free warranty, giving you confidence and peace of mind in your repair.
Will this fix a P0700 code?
A P0700 code is a general fault code indicating the TCM has detected a problem. While this module often resolves the root cause (like a faulty solenoid driver), you should always confirm the specific codes stored within the TCM itself. If the specific codes point to an internal module failure, this part is the correct solution.
Where is the TCM located on a 2007 Suburban 1500?
On the 2007-2008 Chevrolet Suburban 1500, the Transmission Control Module is located in the engine compartment, typically mounted right next to the battery.