Tired of Erratic Shifting in Your Suburban? Here’s the Solution.
If your 2007-2008 Chevrolet Suburban 1500 is suffering from harsh shifts, getting stuck in gear, or throwing transmission codes, you’ve come to the right place. As a technician with over two decades of experience, I’ve seen countless GM trucks and SUVs sidelined by a faulty Transmission Control Module (TCM). This isn’t just an annoyance; it affects your vehicle’s reliability, fuel economy, and safety. This T42 series TCM, part number 24241806, is the direct-fit, reliable fix you need to restore your transmission’s smooth operation and get your truck back to performing like it should.
The biggest hurdle with replacing a TCM has always been the expensive and time-consuming trip to the dealership for programming. We eliminate that step entirely. We flash this module with the latest GM software updates and program it specifically to your vehicle’s VIN before it ships. This means it arrives at your door ready for a true plug-and-play installation. No special tools, no dealer appointments—just a straightforward repair that saves you time and money.
Case Study: A Tricky Diagnosis
A customer brought in their ’08 Suburban complaining of intermittent, hard 1-2 shifts and occasionally getting stuck in 3rd gear (limp mode), especially on hot days. They were worried they needed a full transmission rebuild, a multi-thousand dollar job. I scanned it and pulled a generic P0700 code along with a specific solenoid performance code. Instead of jumping to the worst-case scenario, I checked the TCM. After 20 years in the bay, I know that heat and vibration can cause hairline cracks in the TCM’s circuit board, leading to exactly these kinds of intermittent electrical faults. We swapped in a VIN-programmed TCM, and the problem was solved instantly. The customer saved a fortune and got their family vehicle back on the road, running perfectly. This is often the first and most effective fix for electronic transmission issues.
Is Your Suburban Showing These Warning Signs?
- ✔ Harsh, banging shifts or delayed gear engagement.
- ✔ The vehicle is stuck in “limp mode” and won’t shift out of 2nd or 3rd gear.
- ✔ The Check Engine Light is on with transmission-related Diagnostic Trouble Codes (DTCs) like P0700, P0750-P0758, or other solenoid circuit faults.
- ✔ Inconsistent upshifting or downshifting, making driving unpredictable.
- ✔ A noticeable drop in fuel efficiency and potential transmission overheating.
- ✔ Complete loss of communication with the transmission module.
A Straightforward Guide to Your TCM Installation
Replacing the 2007-2008 Suburban 1500 Transmission Control Module is a job most DIYers can handle in their own driveway in under 30 minutes. For these specific models, the TCM is typically located in the engine compartment, right next to the battery.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts and to help reset the system.
- Locate the Module: 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 unplug the electrical harnesses. They have locking tabs that need to be released. Once unplugged, unbolt the module from its mounting bracket.
- Install the New Module: Bolt the new, pre-programmed TCM into place. Securely plug in the electrical connectors, ensuring they click and lock into position.
- Final Steps: Reconnect the negative battery terminal. While the module is plug-and-play, it’s always best practice to use a basic OBD2 scan tool to clear any stored fault codes from the vehicle’s memory. Start the engine and take it for a test drive to confirm the smooth shifting.
Verified Vehicle Compatibility
This module is a direct replacement for part number 24241806 and other service numbers. While this page focuses on the 2007-2008 Suburban 1500 Transmission Control Module, it also fits a wide range of GM vehicles. Please verify your model and year from the list below:
- Chevrolet: Suburban 1500 (07-08), Tahoe (07-09), Silverado 1500/2500 (07-13), Avalanche 1500 (07-08), Express Van (06-14), Cobalt (06-10), HHR (06-11), Impala (06-11), Monte Carlo (06-07), Malibu (06-10), Colorado (08-12)
- GMC: Yukon / Yukon XL 1500 (07-09), Sierra 1500/2500 (07-13), Savana Van (06-14), Envoy (06-09), Canyon (08-12)
- Cadillac: DTS (06-11)
- Buick: LaCrosse (06-09), Lucerne (06-11), Allure (06-09), Rainier (06-07), Rendezvous (06-07)
- Pontiac: G6 (06-10), Grand Prix (06-08), G5 (07-10), Pursuit (06)
- Saturn: Vue (07-10), Aura (07-09), Ion (06-07)
- Hummer: H3 (08-10)
- Saab: 9-7X (06-09)
Note: Location may vary on different models (e.g., under air cleaner box, on LH strut tower). Always confirm the part number on your original module.
Frequently Asked Questions
Frequently Asked Questions
Do I need to take my vehicle to the dealer for programming after installation?
No. This module comes fully programmed to your vehicle’s specific VIN. It is a plug-and-play solution that requires no additional programming or dealership visits, saving you hundreds of dollars.
Is this a brand new part?
This is a high-quality, OEM-spec component that has been expertly tested and programmed. It meets or exceeds original factory standards for performance and reliability and is backed by our one-year warranty.
What if my part number is slightly different?
This T42 TCM is interchangeable with many part numbers, including 24252114, 24234503, 24240400, and others listed in the description. As long as your vehicle is on the compatibility list, this module will work as a direct replacement.
Is there a core charge for my old module?
No, there is absolutely no core charge. You can keep your old part without any hassle or need to ship it back to us.
What tools do I need for the installation?
For a 2007-2008 Suburban, you typically only need basic hand tools, such as a socket wrench (commonly 10mm) to disconnect the battery and unbolt the module. No specialized equipment is required.