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In 2003, the GMC Yukon requires 5w30 oil and holds 6 quarts. It's crucial to use high-quality oil for the engine to operate smoothly. Eventually, issues may arise with the oil, such as a strong burning smell. It's important to address this promptly to prevent potential engine damage. Poor quality oil can lead to engine failure, indicated by knocking noises and decreased gas mileage. It's essential to change the oil regularly, approximately every 5,000 to 10,000 miles. Neglecting to do so can result in significant engine problems.
The 2003 GMC Yukon comes with different engine options, such as the 4.8L V8, the 5.3L V8 (engine code T), and the 5.3L V8 (engine code Z Flex), all of which need 6 quarts of 5W30 synthetic oil.