The 2024 GMC Yukon XL SLT 5.3 is the extended-length version of GMCs full-size SUV, powered by the standard 5.3L EcoTec3 V8. Its one of the most popular trims because it balances luxury features, towing ability, and passenger/cargo space without jumping to Denali pricing.The 5.3 is reliable overall but can feel less powerful than the 6.2 when heavily loaded or towing.
Fuel economy is decent for a vehicle this size, with many owners reporting around 1722 MPG highway
