{"id":425,"date":"2026-06-11T17:49:31","date_gmt":"2026-06-11T21:49:31","guid":{"rendered":"https:\/\/www.worldsbestdieseloil.com\/oil-guide\/2021-gmc-yukon-3-0l-6-cyl-diesel-turbo-maintenance-guide\/"},"modified":"2026-06-11T17:49:31","modified_gmt":"2026-06-11T21:49:31","slug":"2021-gmc-yukon-3-0l-6-cyl-diesel-turbo-maintenance-guide","status":"publish","type":"post","link":"https:\/\/www.worldsbestdieseloil.com\/oil-guide\/2021-gmc-yukon-3-0l-6-cyl-diesel-turbo-maintenance-guide\/","title":{"rendered":"2021 GMC Yukon 3.0L LM2 T Diesel Maintenance Guide: Oil & Fluid Specs"},"content":{"rendered":"
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\"AMSOIL
AMSOIL diesel oil guide for trucks, vans, SUVs and diesel engines<\/figcaption><\/figure>\n

For the 2021 GMC Yukon equipped with the 3.0L 6-cylinder LM2 T Diesel Turbo engine, the required oil viscosity is 0W-20. The engine oil capacity is 7 quarts when performing a service with a filter change. AMSOIL recommends using AMSOIL 0W-20 100% Synthetic Diesel Oil<\/a> (DP020QT-EA<\/a>) paired with a WIX Oil Filter<\/a> (WL10351-EA<\/a>) for optimal protection.<\/p>\n

What oil does a 2021 GMC Yukon 3.0L Diesel take?<\/h2>\n

The 2021 GMC Yukon with the 3.0L 6-cylinder LM2 T Diesel Turbo engine requires an oil viscosity of 0W-20 for all temperatures. The AMSOIL lookup oil grade is SEOA5. For vehicles originally using GM Dexos2, the AMSOIL lookup note states that a GM Dexos D licensed engine oil of the appropriate viscosity grade may be used.<\/p>\n

AMSOIL product recommendations<\/h2>\n

The following AMSOIL products are recommended for your 2021 GMC Yukon 3.0L Diesel based on the available application data.<\/p>\n

Engine Oil & Filter<\/h3>\n
\n\n\n\n\n
Product Name<\/th>\nCode<\/th>\n<\/tr>\n
AMSOIL 0W-20 100% Synthetic Diesel Oil<\/td>\nDP020QT-EA<\/a><\/td>\n<\/tr>\n
WIX Oil Filter<\/td>\nWL10351-EA<\/a><\/td>\n<\/tr>\n<\/table>\n<\/div>\n

Coolant & Transmission Fluids<\/h3>\n
\n\n\n\n\n\n
Product Name<\/th>\nCode<\/th>\n<\/tr>\n
AMSOIL Passenger Car & Light Truck Antifreeze & Coolant<\/td>\nANTPC1G-EA<\/a><\/td>\n<\/tr>\n
AMSOIL Propylene Glycol Antifreeze and Engine Coolant<\/td>\nANT1G-EA<\/a><\/td>\n<\/tr>\n
AMSOIL Signature Series ULV 100% Synthetic ATF<\/td>\nULVPK-EA<\/a><\/td>\n<\/tr>\n<\/table>\n<\/div>\n

Transfer Case & Differential<\/h3>\n
\n\n\n\n\n\n
Product Name<\/th>\nCode<\/th>\n<\/tr>\n
AMSOIL Signature Series Fuel-Efficient ATF<\/td>\nATLPK-EA<\/a><\/td>\n<\/tr>\n
AMSOIL OE Fuel-Efficient 100% Synthetic ATF<\/td>\nOTLQT-EA<\/a><\/td>\n<\/tr>\n
AMSOIL SEVERE GEAR\u00ae 75W-85 100% Synthetic Gear Lube<\/td>\nSVLPK-EA<\/a><\/td>\n<\/tr>\n<\/table>\n<\/div>\n

Engine Oil Specifications<\/h3>\n
\n\n\n\n
Viscosity<\/th>\nOil Grade (AMSOIL Lookup)<\/th>\n<\/tr>\n
0W-20<\/td>\nSEOA5<\/td>\n<\/tr>\n<\/table>\n<\/div>\n

Engine Oil Capacity<\/h3>\n
\n\n\n\n
Service Type<\/th>\nCapacity<\/th>\n<\/tr>\n
With Filter Change<\/td>\n7 quarts<\/td>\n<\/tr>\n<\/table>\n<\/div>\n

Note: After refilling, always check the oil level.<\/em><\/p>\n

Oil Drain Plug Torque<\/h3>\n
\n\n\n\n
Component<\/th>\nTorque Value<\/th>\n<\/tr>\n
Oil Drain Plug<\/td>\n18 ft\/lbs<\/td>\n<\/tr>\n<\/table>\n<\/div>\n

How much transmission and coolant does it take?<\/h2>\n

Transmission fluid requirements vary based on whether your vehicle is equipped with a cooler. For the 10-speed automatic transmission (10L80), the total fill capacity is 11.5 quarts for the transmission only, or 12 quarts if equipped with a cooler. The initial fill is 8.1 quarts.<\/p>\n

Automatic Transmission Fluid (10L80)<\/h3>\n
\n\n\n\n\n
Configuration<\/th>\nTotal Fill Capacity<\/th>\n<\/tr>\n
10-speed Trans Only<\/td>\n11.5 quarts<\/td>\n<\/tr>\n
10-speed With Cooler<\/td>\n12 quarts<\/td>\n<\/tr>\n<\/table>\n<\/div>\n

The AMSOIL lookup note references the WSS-M2C949-A specification for this application, noting that products meeting this spec are available under DEXRON ULV and MERCON ULV tradenames.<\/p>\n

Coolant Capacity<\/h3>\n
\n\n\n\n
Component<\/th>\nCapacity<\/th>\n<\/tr>\n
Engine Cooling System<\/td>\n21.9 quarts<\/td>\n<\/tr>\n<\/table>\n<\/div>\n

Transfer Case and Differential Specifications<\/h2>\n

The transfer case requires specific lubrication based on the identification tag found on the case. For the MP3015, 25 application, the capacity is 3.2 pints. The front differential has a capacity of 2.3 pints.<\/p>\n

Transfer Case Torque Specs<\/h3>\n
\n\n\n\n\n
Component<\/th>\nTorque Value<\/th>\n<\/tr>\n
Drain Plug<\/td>\n15 ft\/lbs<\/td>\n<\/tr>\n
Fill Plug<\/td>\n15 ft\/lbs<\/td>\n<\/tr>\n<\/table>\n<\/div>\n

Diesel maintenance notes for this vehicle<\/h2>\n