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GMC Yukon K2XX (4th Generation)

20152020 · GMT K2UG · suv

Fourth-generation Yukon on the K2XX platform. EcoTec3 5.3L L83 V8 standard; 6.2L L86 V8 on Denali. 6-speed (5.3L), 8-speed 8L90 (6.2L). Magnetic Ride Control standard on Denali.

Watch out: 5.3L L83 AFM lifter failure is the GM-family default issue. 8-speed 8L90 shudder on early Denali builds is the other recurring complaint — software reflash + revised valve-body components address most cases.

Full clubhouse — owner Garage Lineage, common problems, year-by-year notes, and product picks — is on the build list.

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