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GMC Yukon XL K2XX (4th Generation)
2015–2020 · GMTK2YG · suv
Fourth-generation Yukon XL on the K2XX platform (sibling to K2XX Suburban / Tahoe / Yukon). EcoTec3 5.3L L83 V8 standard; 6.2L L86 V8 on Denali (added 2018). 6-speed automatic (5.3L), 10-speed 10L80 (6.2L from 2018). Magnetic Ride on Denali.
Watch out: 5.3L L83 AFM lifter failure is the dominant issue across the K2XX family. 8-speed 8L90 shudder on early 6.2L trucks is the secondary complaint.
Full clubhouse — owner Garage Lineage, common problems, year-by-year notes, and product picks — is on the build list.
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