2021 GMC Yukon AT4FACTORY OEM SERVICE PROCEDURE

Quick Lookups: Fluids

FLUID CAPACITIES
Fluid Type Application Standard Metric Fluid Spec Note S/H
Air Cond Compressor Oil 7.00 OZS. 0.2 L See Compressor Label S
Air Cond Refrigerant Front & Rear 1.80 LBS. 0.81 KG R-1234yf S
Automatic Transmission Fluid Complete Trans System (Heavy Duty Cooling) 12.08 QTS. 11.43 L Automatic Transmission Fluid DEXRON ULV All capacities are approximate. When adding, be sure to fill to the approximate level. Recheck the fluid level after filling. S
Automatic Transmission Fluid Overhaul 11.57 QTS. 10.94 L Automatic Transmission Fluid DEXRON ULV All capacities are approximate. When adding, be sure to fill to the approximate level. Recheck the fluid level after filling. S
Automatic Transmission Fluid Pan Removal & Filter Replacement 8.10 QTS. 7.66 L Automatic Transmission Fluid DEXRON ULV All capacities are approximate. When adding, be sure to fill to the approximate level. Recheck the fluid level after filling. S
Brake Fluid 2.11 PTS. 0.99 L DOT 4 Motor Vehicle Brake Fluid S
Diesel Exhaust Fluid 5.30 GALS. 20.06 L S
Differential Gear Oil Front Axle 1.14 QTS. 1.07 L GM Part No. 19300457. All capacities are approximate. When adding, be sure to fill to the approximate level. Recheck the fluid level after filling. S
Differential Gear Oil Rear Axle - G86 1.59 QTS. 1.5 L GM Part No. 19417365. All capacities are approximate. When adding, be sure to fill to the approximate level. Recheck the fluid level after filling. S
Differential Gear Oil Rear Axle - G96 1.59 QTS. 1.5 L GM Part No. 19418501. All capacities are approximate. When adding, be sure to fill to the approximate level. Recheck the fluid level after filling. S
Engine Coolant 5.3L Eng 15.62 QTS. 14.78 L 50/50 mixture of DEX-COOL and clean, drinkable water All capacities are approximate. When adding, be sure to fill to the approximate level. Recheck the fluid level after filling. S
Engine Oil 5.3L Eng w/Filter 8.00 QTS. 7.57 L API - SAE 0W-20 Engine oil meeting the dexos1 specification of the proper SAE viscosity grade. ACDelco dexos1 full synthetic is recommended. S
Engine Oil 5.3L Eng w/o Filter 7.50 QTS. 7.09 L API - SAE 0W-20 Engine oil meeting the dexos1 specification of the proper SAE viscosity grade. ACDelco dexos1 full synthetic is recommended. S
Transfer Case Fluid 1.60 QTS. 1.51 L Automatic Transmission Fluid DEXRON VI S
Windshield Washer Fluid N/A N/A Windshield Washer Fluid Follow the Manufacturer's Instructions for the mixture ratio. Automotive windshield washer fluid that meets regional freeze protection requirements. S
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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