GMC Yukon XL 1500 gas tank leaking from fill line due to faulty rubber gasket on GMC Yukon XL 1500

Submitted by Vehicle Owner · Jun 23, 2025
Published by RepairPal

Problem overview

Some GMC Yukon XL 1500 owners report experiencing gas tank leaks from the fill line due to a faulty rubber gasket at the connection point. These leaks pose serious safety hazards and require prompt attention to avoid dangerous situations. While some individuals attempt DIY repairs to save costs, it is crucial to possess the necessary skills to handle such repairs safely. If unsure, seeking professional assistance from a mechanic or specialized service center is advisable. Owners are also encouraged to check for any recalls or safety notices related to fuel tank leaks in their models to ensure compliance with manufacturer recommendations. A thorough inspection of the fill line and rubber gasket is necessary to pinpoint the leak's exact location and determine the required repair steps. Additionally, regular maintenance and inspection of the fuel system can help prevent future leaks.

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