Is Your Yukon XL Shifting Erratically or Stuck in Limp Mode?
Driving your 2007-2008 GMC Yukon XL 1500 should be a smooth experience, but a failing Transmission Control Module (TCM) can turn any trip into a frustrating ordeal. If you’re dealing with harsh, slamming shifts, a transmission that refuses to shift out of gear, or a persistent Check Engine Light, the problem often points directly to this critical electronic component. The TCM is the brain of your automatic transmission, and when it fails, it can mimic the symptoms of a catastrophic transmission failure, causing unnecessary stress and diagnostic headaches.
“A customer’s 2007 Yukon XL came in last week with these exact symptoms. The owner was convinced his 4L60E transmission was shot. It was slamming into gear and had a P0700 code stored. Before quoting a multi-thousand dollar transmission job, we checked the basics. After confirming the fluid was clean and connections were solid, we swapped in a VIN-programmed T42 TCM. The difference was immediateโsmooth shifts returned, and the codes were gone. It was a 30-minute fix that saved him a massive repair bill.”
The Direct Solution: A VIN-Programmed T42 TCM
This OEM-quality T42 Transmission Control Module is the definitive solution for your vehicle’s shifting problems. Forget about expensive dealership visits and the hassle of finding a shop that can program a new module. We handle the programming for you. Simply provide your vehicle’s VIN during checkout, and we will flash the module with the latest GM software specific to your Yukon XL. It arrives at your door ready for a true plug-and-play installation.
Common Symptoms of a Faulty 2007-2008 Yukon XL 1500 TCM:
- โ Harsh, delayed, or unpredictable gear shifts.
- โ Vehicle stuck in one gear (often called “limp mode”).
- โ Check Engine Light and/or Transmission Warning Light illuminated.
- โ Diagnostic Trouble Codes (DTCs) such as P0700, P0750, or other solenoid-related faults.
- โ A sudden drop in fuel economy.
- โ Complete loss of communication with the transmission.
Plug-and-Play Installation: No Dealer Visit Required
You can get your truck back to perfect working order in your own driveway. For the 2007-2008 Yukon XL 1500, the TCM is conveniently located in the engine compartment, right next to the battery. The entire process typically takes less than 30 minutes.
- Safety First: 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 on the driver’s side.
- Disconnect and Remove: Carefully unplug the electrical connectors. Use a small flathead screwdriver to gently release the locking tabs if necessary. Then, unbolt the module from its mounting bracket.
- Install the New TCM: Bolt the new, pre-programmed module into place and securely reconnect the electrical harnesses. You’ll hear a click as they lock in.
- Final Steps: Reconnect the battery terminal. Start the vehicle and use a basic OBD2 scan tool to clear any lingering fault codes from the computer’s memory.
Guaranteed Compatibility and Reliability
This module is a direct replacement for part number 24235340 and is interchangeable with a wide range of other GM service numbers, including 24252114, 24234503, 24242391, and more. It is built to strict OEM specifications and is backed by our one-year warranty, giving you peace of mind whether you’re towing a trailer or just running daily errands. Restore the precise, smooth operation your GM truck was designed for.