2006 GMC Yukon Owner's Manual - Page 489

Application Fuel Tank Yukon Yukon XL (1500 Series) Yukon XL (2500 Series) Transfer Case Fluid Wheel Nut Torque Capacities English 26.0 gal 31.0 gal 37.5 gal 2.0 qts 140 lb ft Metric 98.4 L 117.3 L 140.0 L 1.9 L 190 Y †Oil filter should be changed at every oil change. After refill, the level must be rechecked. Add enough engine coolant so that the fluid is within the proper operating range. Engine Specifications Engine VORTEC™ 4800 V8 VORTEC™ 5300 V8 VORTEC™ 5300 V8 VORTEC™ 6000 V8 VORTEC™ 8100 V8 VIN Code V T Z U G Transmission Automatic Automatic Automatic Automatic Automatic Spark Plug Gap 0.040 in (1.01 mm) 0.040 in (1.01 mm) 0.040 in (1.01 mm) 0.040 in (1.01 mm) 0.060 in (1.52 mm) 5-115