End Erratic Shifting and Get Your Truck Back to Work
If you’re dealing with a transmission that seems to have a mind of its own—slamming into gear, refusing to shift, or putting your truck into a frustrating limp mode—you know how quickly it can sideline your vehicle. As a technician with over two decades of experience, I’ve seen countless GM trucks, especially the hard-working Silverado 2500, suffer from these exact issues. The culprit is often a failing Transmission Control Module (TCM). This T42 TCM, part number 24243901, is the definitive solution, arriving pre-programmed to your truck’s specific VIN for a true plug-and-play repair that restores the crisp, reliable shifting you depend on.
A Technician’s Notebook: The Misleading Solenoid Codes
A customer brought in his ’07 Sierra with a classic complaint: harsh 1-2 shift and a check engine light. His scanner showed a P0752 code for Shift Solenoid A Stuck On. He had already replaced the solenoid himself, but the problem persisted. This is a scenario I’ve diagnosed hundreds of times. While the code points to the solenoid, the root cause is often the driver circuit inside the TCM failing. The TCM can no longer properly command the solenoid, leading to the code. We installed a VIN-programmed 2007 Silverado 2500 TCM, cleared the codes, and the truck shifted perfectly. It saved him from a costly and unnecessary internal transmission repair.
Is Your Silverado Suffering From These Transmission Woes?
A faulty TCM can manifest in various ways, often getting worse over time. Here are the most common signs that your transmission’s brain is failing:
- ✔ Harsh, delayed, or unpredictable gear shifts.
- ✔ Vehicle is stuck in one gear (often 2nd or 3rd), also known as “limp mode.”
- ✔ Check Engine Light or Transmission Warning Light is on with codes like P0700, P0750, P0752, or other solenoid-related DTCs.
- ✔ Failure to upshift or downshift, resulting in poor acceleration and terrible fuel economy.
- ✔ Intermittent loss of communication with the module, causing erratic behavior.
- ✔ Complete inability to engage gears, leaving you stranded.
A Straightforward Installation Guide
Replacing the 2007 Silverado 2500 TCM is a job most DIYers can handle in their own driveway in under 30 minutes. The module is typically located in the engine bay, next to the battery.
- Safety First: Disconnect the negative terminal from your truck’s battery to prevent any electrical shorts and to help reset the vehicle’s computer systems.
- Locate the TCM: On your Silverado 2500, 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 be gentle. Then, unbolt the module from its mounting bracket.
- Install the New Module: Bolt the new, pre-programmed TCM into place. Securely reconnect the wiring harnesses, ensuring they click and lock into position.
- Final Steps: Reconnect the battery terminal. While our programming handles the critical setup, it’s always a good practice to use a basic scan tool to clear any stored fault codes from the vehicle’s memory. Start the truck and enjoy smooth shifting!
Verified Vehicle Compatibility
This module is a direct-fit replacement for a wide range of General Motors vehicles. Please verify your model and specific options below. This part is interchangeable with service numbers 24252114, 24234503, 24230461, and many more.
This part will fit these makes and models with these options:
AVALANCHE 1500 07-08 Transmission; (next to battery)
CANYON 08-12 Transmission; (RH rear engine compartment)
COLORADO 08-12 Transmission; (RH rear engine compartment)
ENVOY 06-07 Transmission; (LH engine compartment), (8 cylinder)
EXPRESS 1500 VAN 06-14 Transmission; (RH engine compartment)
EXPRESS 2500 VAN 06-14 Transmission; (RH engine compartment)
EXPRESS 3500 VAN 06-14 Transmission; (RH engine compartment)
HUMMER H3 08-10 Transmission; (RH rear engine compartment)
SAVANA 1500 VAN 06-14 Transmission; (RH engine compartment)
SAVANA 2500 VAN 06-14 Transmission; (RH engine compartment)
SAVANA 3500 VAN 06-14 Transmission; (RH engine compartment)
SIERRA 1500 PICKUP 07 Transmission; (new style, smooth door skin), (next to battery)
SIERRA 1500 PICKUP 08 Transmission; (next to battery)
SIERRA 1500 PICKUP 09-13 Transmission; (next to battery), w/o hybrid option
SIERRA 2500 PICKUP 07 Transmission; new style (smooth door skin), 6.0L, (next to battery)
SILVERADO 2500 PICKUP 07 Transmission; new style (smooth door skin), 6.0L, (next to battery)
SILVERADO 1500 PICKUP 07 Transmission; (new style, smooth door skin), (next to battery)
SILVERADO 1500 PICKUP 08 Transmission; (next to battery)
SILVERADO 1500 PICKUP 09-13 Transmission; (next to battery), w/o hybrid option
SSR 05-06 Transmission; (front LH frame)
SUBURBAN 1500 07-08 Transmission; (next to battery)
TAHOE 07 Transmission; (next to battery)
TAHOE 08-09 Transmission; (next to battery), w/o auxiliary oil cooler pump
TRAILBLAZER 06-07 Transmission; (LH engine compartment), (8 cylinder)
TRAILBLAZER 08-09 Transmission; (LH engine compartment)
YUKON 07 Transmission; (next to battery)
YUKON 08 Transmission; (next to battery), w/o auxiliary oil cooler control
YUKON 09 Transmission; (next to battery), w/o auxiliary oil cooler pump
YUKON XL 1500 07-08 Transmission; (next to battery)
…and many more GM cars, trucks, and SUVs.
Do I need to take my truck to the dealership for programming?
Do I need to take my truck to the dealership for programming?
No. This module comes fully programmed to your vehicle’s VIN. It is ready for installation right out of the box, saving you the time and expense of a dealer visit.
Is this a reliable fix for a 2007 Silverado 2500 TCM failure?
Absolutely. This is a high-quality replacement built to meet or exceed OEM specifications. It directly addresses the common failure points of the original T42 modules, providing a durable and long-lasting solution to your transmission problems.
Do I need to return my old part?
No, there is no core charge for this part. You can keep your old module or dispose of it without any hassle or extra fees.
What kind of warranty is included?
This part is backed by our one-year warranty, giving you peace of mind. We stand behind the quality and reliability of our programmed electronic modules.