{"id":430,"date":"2026-06-12T00:04:31","date_gmt":"2026-06-12T04:04:31","guid":{"rendered":"https:\/\/www.worldsbestdieseloil.com\/oil-guide\/2021-chevrolet-suburban-3-0l-6-cyl-diesel-turbo-maintenance-guide\/"},"modified":"2026-06-12T00:04:31","modified_gmt":"2026-06-12T04:04:31","slug":"2021-chevrolet-suburban-3-0l-6-cyl-diesel-turbo-maintenance-guide","status":"publish","type":"post","link":"https:\/\/www.worldsbestdieseloil.com\/oil-guide\/2021-chevrolet-suburban-3-0l-6-cyl-diesel-turbo-maintenance-guide\/","title":{"rendered":"2021 Chevrolet Suburban 3.0L 6-Cyl 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 Chevrolet Suburban 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 change with a new filter. AMSOIL recommends using AMSOIL 0W-20 100% Synthetic Diesel Oil<\/a> (DP020QT-EA<\/a>) and a WIX Oil Filter<\/a> such as WL10351-EA<\/a> for optimal protection.<\/p>\n

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

The 2021 Chevrolet Suburban 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 lookup notes that a GM Dexos D licensed engine oil of the appropriate viscosity grade may be used.<\/p>\n

AMSOIL product recommendations<\/h2>\n

Based on the AMSOIL lookup for your 2021 Chevrolet Suburban 3.0L Diesel, the following products are recommended to maintain engine and drivetrain health.<\/p>\n

Engine Oil & Filter<\/h3>\n
\n\n\n\n\n
Product Name<\/th>\nPart Code<\/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>\nPart Code<\/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

Drivetrain & Gear Lubricants<\/h3>\n
\n\n\n\n\n\n
Product Name<\/th>\nPart Code<\/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 Synthetic Gear Lube<\/td>\nSVLPK-EA<\/a><\/td>\n<\/tr>\n<\/table>\n<\/div>\n

Engine Oil Specifications<\/h3>\n
\n\n\n\n\n
Specification<\/th>\nDetail<\/th>\n<\/tr>\n
Viscosity<\/td>\n0W-20 (All TEMPS)<\/td>\n<\/tr>\n
AMSOIL Lookup Oil Grade<\/td>\nSEOA5<\/td>\n<\/tr>\n<\/table>\n<\/div>\n

Engine Oil Capacity & Torque<\/h3>\n
\n\n\n\n\n
Component<\/th>\nCapacity \/ Torque<\/th>\n<\/tr>\n
Oil Capacity (with filter)<\/td>\n7 quarts<\/td>\n<\/tr>\n
Oil Drain Plug Torque<\/td>\n18 ft\/lbs<\/td>\n<\/tr>\n<\/table>\n<\/div>\n

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

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

The 2021 Chevrolet Suburban uses the 10L80 automatic transmission. The capacity varies depending on whether your vehicle is equipped with a cooler. For the 10-speed transmission, the total fill with a cooler is 12 quarts, while the total fill with an O Cooler is 11.5 quarts. An initial fill of 8.1 quarts is also noted.<\/p>\n

Automatic Transmission Fluid Details<\/h3>\n

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

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

For transfer case maintenance on models such as the MP3015 or 25 AF6, the capacity is 3.2 pints. The drain plug and fill plug both require a torque of 15 ft\/lbs. Always check the tag on the case for identification. For the front differential, the capacity is 2.3 pints.<\/p>\n

Common diesel oil-related concerns and how AMSOIL products may help<\/h2>\n

Diesel engines face unique stresses including high soot loading and temperature extremes. The following table outlines how specific AMSOIL products can support your maintenance needs.<\/p>\n

\n\n\n\n\n\n
Concern<\/th>\nWhy it matters<\/th>\nAMSOIL Product<\/th>\nHow it may help<\/th>\nLimitation<\/th>\n<\/tr>\n
Engine Wear<\/td>\nDiesel combustion is high-pressure.<\/td>\nDP020QT-EA<\/a><\/td>\nDelivers up to 6X more wear protection than leading industry standards.<\/td>\nRequires regular intervals.<\/td>\n<\/tr>\n
Temperature Extremes<\/td>\nCold starts and high heat affect viscosity.<\/td>\nDP020QT-EA<\/a><\/td>\nExcels in hot and cold temperature extremes.<\/td>\nNot confirmed from source data.<\/td>\n<\/tr>\n
Heavy Towing Stress<\/td>\nIncreases transmission heat.<\/td>\nULVPK-EA<\/a><\/td>\nWithstands rigors of heavy towing and elevated temperatures.<\/td>\nNot confirmed from source data.<\/td>\n<\/tr>\n<\/table>\n<\/div>\n

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