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Engine 5.3L 8-Cylinder

  • Recommended Oil Viscosity: 0W-20

  • Oil certification: DEXOS-1

  • Oil capacity: 8.0 quarts

Spark Plug Gap

  • 5.3L 8-Cylinder: 0.040''

Engine 6.2L 8-Cylinder

  • Recommended Oil Viscosity: 0W-20

  • Oil certification: DEXOS-1

  • Oil capacity: 8.0 quarts 

Spark Plug Gap

  • 6.2L 8-Cylinder: 0.040''

Cooling System

  • Capacity: 

  •     5.3L V8; 6.2L V8:17.8 qt (16.8 L)

Fuel Tank

  • Capacity
    • Short Wheelbase:26.0 gal ( 98.4 L)

    • Long Wheelbase:31.5 gal (119.2 L)

Transfer Case Fluid

  • Capacity: 1.6 qt (1.5 L)

Automatic Transmission (Except Denali)

  • Type: DEXRON-VI Automatic Transmission Fluid

Automatic Transmission (Denali Only)

  • Type: DEXRON ULV Automatic Transmission Fluid (GM Part No. 19352619, in Canada 19352620)

Chassis Lubrication

  • Type: Chassis Lubricant (GM Part No. 12377985, in Canada 88901242) or lubricant meeting requirements of NLGI #2, Category LB or GC-LB

Engine Coolant

  • Type: 50/50 mixture of clean, drinkable water and use only DEX-COOL® Coolant.

Front Axle (Four-Wheel Drive)

  • Type: SAE 75W-90 Synthetic Axle Lubricant (GM Part No. 88900401, in Canada 89021678)

Front Axle Propshaft Spline or One-Piece Propshaft Spline (Two-Wheel Drive)

  • Type: Spline Lubricant, Special Lubricant (GM Part No. 19257121, in Canada 19257122)

Key Lock Cylinders, Hood Hinges, Power Assist Steps, and Outer Liftgate Handle Pivot Points

  • Type: Multi-Purpose Lubricant, Superlube (GM Part No. 12346241, in Canada 10953474).

Rear Axle

  • Type: SAE 75W-85 Synthetic Axle Lubricant (GM Part No. 19300457, in Canada 19300458).

Transfer Case (Four-Wheel Drive)

  • Type: DEXRON®-VI Automatic Transmission Fluid

Hydraulic Brake System

  • Type: DOT 3 Hydraulic Brake Fluid (GM Part No. 19353126, in Canada 19299819).

Windshield Washer Solvent

  • Type: Automotive windshield washer fluid that meets regional freeze protection requirements.

Power Steering System

  • Type: GM Power Steering Fluid (GM Part No. 89021185, in Canada 89021186).

Weatherstrip Conditioning

  • Type: Weatherstrip Lubricant (GM Part No. U.S. 3634770,in Canada 10953518) or Dielectric Silicone Grease (GM Part No. U.S. 12345579, in Canada 992887).

Weatherstrip Squeaks

  • Type: Synthetic Grease with Teflon, Superlube   (GM Part No. U.S. 12371287, in Canada 10953437)


Windshield Washer

  • Type: Automotive windshield washer fluid that meets regional freeze protection requirements



  • 5.3 L Ecotec3 FlexFuel V8

  • 6.2 L Ecotec3 FlexFuel V8


  • 6-speed 6L80 automatic

  • 8-speed 8L90 automatic (Denali)

Fuel Consumption


Safety Ratings



  1. 2018 GMC Yukon Owners Manual 

  2. GMC Yukon-

  3. US Department of Energy -

  4. NHTSA | National Highway Traffic Safety Administration -


Front Lights

  • Daytime Running Light Bulb: LED

  • Front Fog Light Bulb: 12278

  • Front Sidemarker Light Bulb: LED

  • Front Turn Signal Light Bulb: LED

  • High Beam Headlight Bulb: 9005LL

  • Low Beam Headlight Bulb:

    • H11LL

    •  HID-D3S

Rear Lights

  • Back Up Light Bulb: 921

  • Brake Light Bulb: LED

  • Center High Mount Stop Light Bulb: LED

  • License Plate Light Bulb: 2825L

  • Parking Light Bulb: LED

  • Rear Sidemarker Light Bulb: LED

  • Rear Turn Signal Light Bulb: LED

  • Tail Light Bulb: LED

Interior Lights

  • Dome Light Bulb: LED

  • Luggage Compartment Light Bulb: LED

  • Map Light Bulb: LED

  • Vanity Mirror Light Bulb: 6612F