Restore Smooth Shifting to Your 2007-2008 Suburban 1500 with a Programmed TCM
If you’re dealing with erratic shifting, a check engine light, or your Suburban is stuck in limp mode, a failing Transmission Control Module (TCM) is the likely culprit. As a mechanic with over two decades of experience, I’ve seen how a faulty T42 TCM can sideline an otherwise reliable truck. This replacement module, part number 24239224, is the definitive solution, arriving pre-programmed to your vehicle’s VIN for a true plug-and-play fix. Forget expensive dealership trips for programming—this module is ready to install right out of the box, getting your SUV back to peak operational condition.
Is Your Suburban Showing These Transmission Red Flags?
A failing TCM sends clear signals. Diagnosing the issue correctly is the first step to a lasting repair. I’ve seen these symptoms hundreds of times in the shop, and they almost always point to the TCM. If you’re experiencing any of the following, this module is the component you need.
- ✔ Harsh, delayed, or unpredictable gear shifts that make driving uncomfortable.
- ✔ The vehicle is stuck in a single gear (often 2nd or 3rd), a condition known as “limp mode.”
- ✔ An illuminated Check Engine Light or Transmission Warning Light on your dash.
- ✔ Diagnostic Trouble Codes (DTCs) stored in the system, such as P0700, P0750, or other solenoid-related faults.
- ✔ A complete failure to shift up or down, leading to poor acceleration and terrible fuel economy.
- ✔ Intermittent loss of communication with the transmission module.
Case Study: The 2008 Suburban Stuck in Limp Mode
A customer brought in their ’08 Suburban 1500, explaining it wouldn’t shift out of 3rd gear. The check engine light was on, and they were concerned about a major transmission failure. I pulled the codes and found a P0700 (Transmission Control System Malfunction). After checking the wiring and fluid, my diagnosis pointed directly to an internal failure in the factory TCM. Instead of a costly transmission rebuild, we installed one of our VIN-programmed T42 modules. The entire job took less than an hour, the codes cleared, and the Suburban was shifting perfectly on the test drive. The customer saved thousands and avoided unnecessary repairs.
A Straightforward 30-Minute Installation Guide
One of the best features of this part is how simple it is to install. You don’t need a vehicle lift or specialized tools. For the 2007-2008 Suburban 1500 TCM, the module is conveniently located in the engine bay, typically right next to the battery. Follow these steps for a successful installation:
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts and to help reset the vehicle’s electronic systems.
- Locate the Old TCM: Open the hood and 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 from the old module. Then, unbolt the module from its mounting bracket. Keep track of the mounting hardware.
- Install the New Module: Bolt the new, pre-programmed TCM into place using the original hardware. Securely reconnect the wiring harnesses, ensuring they click into place.
- Final Steps: Reconnect the negative battery terminal. Start the vehicle and let it idle for a few minutes. While the module is plug-and-play, it’s good practice to use a basic OBD2 scan tool to clear any lingering fault codes from the computer’s memory.
Verified Fitment for Your GM Vehicle
This T42 TCM is a direct replacement for part number 24239224 and is interchangeable with service numbers like 24252114, 24234503, and others. While this page focuses on the 2007-2008 Suburban 1500, this module fits a wide range of GM cars, trucks, and SUVs. Please verify your vehicle in the list below.
CANYON 08-12 (RH rear engine compartment)
COLORADO 08-12 (RH rear engine compartment)
EXPRESS 1500/2500/3500 VAN 06-14 (RH engine compartment)
HUMMER H3 08-10 (RH rear engine compartment)
SAVANA 1500/2500/3500 VAN 06-14 (RH engine compartment)
SIERRA 1500 PICKUP 07-13 (next to battery)
SIERRA 2500 PICKUP 07 (new style, 6.0L, next to battery)
SILVERADO 1500 PICKUP 07-13 (next to battery)
SILVERADO 2500 PICKUP 07 (new style, 6.0L, next to battery)
SUBURBAN 1500 07-08 (next to battery)
TAHOE 07-09 (next to battery)
YUKON 07-09 (next to battery)
YUKON XL 1500 07-08 (next to battery)
…and many more GM models.
Frequently Asked Questions
Frequently Asked Questions
Do I need to have this TCM programmed by a dealer?
No. We program the module to your vehicle’s specific VIN before shipping. It arrives ready for immediate installation, saving you time and money.
What tools are required for installation?
You’ll only need basic hand tools, such as a socket set to unbolt the module and disconnect the battery. No specialized equipment is necessary.
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 returning it.
Will this fix a P0700 trouble code?
Yes, a faulty TCM is a primary cause of a P0700 code. Replacing the module with this pre-programmed unit is the direct solution for resolving this and related transmission faults.
What kind of warranty is included?
This module is backed by our one-year warranty, giving you confidence and peace of mind in your repair.