2015 GMC Yukon XL Service and Repair Manual

This factory service and repair manual for the 2015 GMC Yukon XL covers a four-door sport utility offered in Denali, SLE and SLT trim, with two flex-fuel overhead-valve V8s on the list: the 5.3L of 325 cubic inches and the 6.2L of 376, both naturally aspirated. With only two engines to separate, the bulk of the book goes to the systems every one of these trucks shares, among them brakes, steering, suspension, restraints, body and a large electrical network, through procedures, specifications, torque values, wiring diagrams and diagnostics.

Engines covered

• 5.3L V8 (325 cu in) — OHV, naturally aspirated, flex-fuel
• 6.2L V8 (376 cu in) — OHV, naturally aspirated, flex-fuel

Body styles covered

• 4-door sport utility

Trims covered

• Denali
• SLE
• SLT

Known issues on the 2015 Yukon XL. Owners have filed 839 complaints with NHTSA on this model year, and they cluster hard: 350 on exterior lighting, 124 on the electrical system and 96 on the service brakes. Between them those three account for most of what has been reported, which puts headlamp and marker circuits, grounds, modules and the brake hydraulic system at the front of any diagnostic plan. The wiring diagrams, circuit tests, component specifications and brake procedures in this manual are aimed at exactly those systems.