Restore Smooth, Reliable Shifting to Your Chevy Suburban
If you’re dealing with the headaches of a faulty transmission—like harsh gear changes, getting stuck in limp mode, or a persistent check engine light—you know how frustrating it can be. As a technician with over two decades of experience, I’ve seen countless GM vehicles, especially the dependable Suburban, sidelined by a failing Transmission Control Module (TCM). The T42 module is the electronic brain of your automatic transmission, and when it fails, it can make your reliable SUV feel unpredictable and unsafe. This isn’t just an inconvenience; it’s a critical component for your vehicle’s performance and longevity.
This replacement T42 TCM is the definitive solution for your 2007-2008 Suburban 1500 TCM issues. We take the guesswork and extra cost out of the repair by pre-programming the module to your vehicle’s specific VIN. This means it arrives ready for a true plug-and-play installation, eliminating the need for an expensive trip to the dealership for programming. You get a reliable part that restores the precise, smooth shifting you expect from your Suburban, all while saving you time and money.
From the Diagnostic Bay: The Case of the Limping Suburban
A customer brought in their 2007 Suburban 1500, complaining that it would barely accelerate and was stuck in what felt like third gear. The transmission warning light was on, and they were worried about a massive repair bill. On my scan tool, I pulled a classic P0700 (Transmission Control System Malfunction) and a few solenoid-specific codes. Instead of immediately quoting a transmission rebuild, I checked the TCM. In my shop, I’ve diagnosed hundreds of these T42 modules where internal circuit failure causes these exact symptoms. We installed one of our VIN-programmed modules, cleared the codes, and had the customer back on the road in under an hour. They were thrilled to avoid a multi-thousand-dollar bill for what was a simple, targeted component replacement.
Is Your Suburban Showing These Warning Signs?
- ✔ Abrupt, harsh, or jerky gear shifts.
- ✔ The vehicle is stuck in a single gear (limp mode), often 2nd or 3rd.
- ✔ Delayed engagement when shifting from Park to Drive or Reverse.
- ✔ Check Engine Light or Transmission Warning Light is illuminated with codes like P0700, P0750, or other transmission-related DTCs.
- ✔ Poor acceleration and a noticeable drop in fuel economy.
- ✔ The transmission seems to slip out of gear while driving.
A Straightforward Guide to Installation
For the 2007-2008 Suburban 1500, this is a repair most DIYers can handle with basic tools in their own driveway. The TCM is typically located in the engine bay, right next to the battery, making it easily accessible.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts and to help reset the system.
- Locate the Old Module: Find the TCM mounted next to the battery. It will have several large electrical connectors attached.
- Disconnect and Remove: Carefully unplug the wiring harnesses. They have locking tabs that may need to be gently pried up. Once disconnected, unbolt the module from its mounting bracket.
- Install the New TCM: Bolt the new, pre-programmed module into place. Securely reconnect the wiring harnesses, ensuring they click into place.
- Final Steps: Reconnect the battery terminal. While our programming handles the critical setup, it’s always a good practice to use a basic OBD-II scan tool to clear any stored fault codes from the vehicle’s memory. Start the engine and test drive to confirm smooth shifting.
Verified Vehicle Compatibility
This module is a direct-fit replacement for the original part in the following vehicles. Please verify your model and year for a guaranteed fit. This part is interchangeable with service numbers including 24242391, 24234503, 24252114, and 24240449.
- Chevrolet Suburban 1500 (2007-2008) – Located next to the battery
- Chevrolet Avalanche 1500 (2007-2008)
- Chevrolet Silverado & GMC Sierra 1500/2500 (2007-2013, non-hybrid)
- Chevrolet Tahoe & GMC Yukon (2007-2009)
- Cadillac DTS (2006-2011)
- Chevrolet Impala (2006-2011)
- And many other GM models from 2006-2014. Please use our vehicle selector for full compatibility.
Will I need to get this TCM programmed by a dealer?
Will I need to get this TCM programmed by a dealer?
No. This module comes fully pre-programmed to your vehicle’s VIN. It is ready for installation right out of the box, saving you the time and expense of a dealership visit.
Is this part difficult to install on my 2007 Suburban?
Not at all. For your Suburban, the TCM is located next to the battery and is one of the easier modules to replace. The entire process typically takes less than 30 minutes with basic hand tools.
What happens if I don’t provide my VIN?
Providing your VIN is essential for us to program the module correctly. Without it, the TCM will not communicate properly with your vehicle’s other systems, and your shifting problems will not be resolved.
Do I need to return my old part?
No, there is no core charge for this part. You can keep or dispose of your old module without any hassle or extra fees.
What warranty is included with this part?
This Transmission Control Module is backed by our one-year, hassle-free warranty, giving you peace of mind with your purchase.