Restore Peak Transmission Performance in Your 2007 Sierra 2500
Is your 2007 GMC Sierra 2500 experiencing frustrating transmission problems like harsh shifting, getting stuck in gear, or an illuminated check engine light? These are classic signs of a failing Transmission Control Module (TCM). The TCM is the electronic brain of your automatic transmission, responsible for orchestrating every gear change, managing torque converter lockup, and monitoring system health. When it fails, it can cripple your truck’s performance and reliability. This genuine OEM-quality T42 TCM, part number 24239224, is the definitive solution, pre-programmed to your truck’s specific VIN for a seamless, plug-and-play installation.
From the Diagnostic Bay
We had a 2007 Sierra 2500 with the 6.0L V8 come into the shop. The owner was frustrated because the truck would intermittently refuse to shift out of 2nd gear, and the transmission temperature light would flicker. He’d already replaced a couple of shift solenoids with no luck. After connecting our scan tool, we pulled a P0700 (Transmission Control System Malfunction) and a U0101 (Lost Communication with TCM). Instead of chasing electrical ghosts, we inspected the TCM located right next to the battery. We noticed slight corrosion on one of the connectors. A quick swap with one of our VIN-programmed T42 modules cleared all the codes instantly. The test drive confirmed it—smooth shifts, no warning lights. It’s a common failure point, and this direct-fit part saved the customer hundreds in diagnostic fees and prevented further transmission damage.
Symptoms of a Failing GM T42 TCM
- ✔ Erratic Shifting: Your truck may shift harshly, slam into gear, or experience delayed shifts between gears.
- ✔ Stuck in Limp Mode: The transmission may default to a single gear (often 2nd or 3rd) to prevent further damage, severely limiting vehicle speed.
- ✔ Warning Lights: The Check Engine Light or a specific transmission warning light will illuminate on your dashboard.
- ✔ Diagnostic Trouble Codes (DTCs): Common codes include P0700, P0750-P0758 (solenoid circuit faults), and communication codes like U0101.
- ✔ Poor Fuel Economy: Inefficient shifting and failure of the torque converter to lock up properly can cause a noticeable drop in MPG.
- ✔ No Engagement: In severe cases, the vehicle may not move when shifted into Drive or Reverse.
Solving Issues with a Programmed 2007 Sierra 2500 TCM
Replacing a faulty module is critical for the longevity of your transmission. Our T42 TCMs are meticulously prepared to meet and exceed original factory specifications. The most significant benefit is our complimentary VIN programming service. When you order, we flash the module with the latest GM software calibrated specifically for your 2007 Sierra 2500. This eliminates the need for an expensive trip to the dealership for programming. It arrives at your door ready for installation, ensuring optimal shift points, fuel efficiency, and communication with other vehicle modules like the Engine Control Module (ECM). This isn’t just a replacement part; it’s a complete restoration of your transmission’s electronic control system.
This module is a direct replacement for a wide range of GM vehicles from 2006-2014 equipped with 4-speed automatic transmissions like the 4L60E, 4L65E, 4L70E, and 4L80E. It interchanges with numerous part numbers, including 24252114, 24234503, 24230461, and 24239224, making it a versatile solution for many trucks, vans, and SUVs.
Frequently Asked Questions
Do I need to program this 2007 Sierra 2500 TCM?
No. This module comes pre-programmed to your vehicle’s specific VIN. This ensures it works correctly right out of the box without requiring any additional programming from a dealership or specialized mechanic.
Where is the TCM located on my 2007 GMC Sierra 2500?
On the 2007 ‘new style’ Sierra 2500 (with the smooth door skin), the Transmission Control Module is typically located in the engine bay, right next to the battery. Always disconnect the battery before attempting removal or installation.
What happens if I don’t replace a failing TCM?
Continuing to drive with a faulty TCM can lead to severe and costly mechanical damage to your transmission. Poor shifting can burn out clutches, damage gears, and cause the transmission to overheat, potentially leading to a complete failure requiring a full rebuild or replacement.
Is this part compatible with other vehicles?
Yes, this T42 TCM is compatible with a wide array of 2006-2014 GM vehicles, including the Chevrolet Silverado, Tahoe, Suburban, Express Van, as well as GMC Yukon, Savana, and Cadillac DTS, among others. Please verify the part number or use our vehicle fitment tool to confirm compatibility.
Is there a core charge for my old part?
No, we do not require a core charge. You can keep your old module without the hassle of returning it, saving you time and money on shipping.