{"id":114,"date":"2026-05-18T20:34:11","date_gmt":"2026-05-19T00:34:11","guid":{"rendered":"https:\/\/www.worldsbestdieseloil.com\/oil-guide\/?p=114"},"modified":"2026-05-31T18:47:21","modified_gmt":"2026-05-31T22:47:21","slug":"2021-gmc-sierra-1500-3-0l-diesel-maintenance-guide","status":"publish","type":"post","link":"https:\/\/www.worldsbestdieseloil.com\/oil-guide\/2021-gmc-sierra-1500-3-0l-diesel-maintenance-guide\/","title":{"rendered":"2021 GMC Sierra 1500 3.0L LM2 Diesel Oil & Maintenance Guide"},"content":{"rendered":"
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\"AMSOIL
AMSOIL diesel oil guide for trucks, vans, SUVs and diesel engines<\/figcaption><\/figure>\n

What oil does a 2021 GMC Sierra 1500 3.0L Diesel take?<\/h2>\n

The 2021 GMC Sierra 1500 with the 3.0L 6-cylinder LM2 T Diesel Turbo engine requires a 0W-20<\/b> viscosity oil. For a standard oil change including the filter, the required capacity is 7.0 quarts<\/b>. AMSOIL recommends using AMSOIL 0W-20 100% Synthetic Diesel Oil<\/a> (DP020QT-EA<\/a>) paired with a WIX Oil Filter<\/a> (WL10351-EA<\/a>).<\/p>\n

AMSOIL product recommendations<\/h2>\n

The following AMSOIL and WIX products are recommended for your 2021 GMC Sierra 1500 3.0L LM2 T Diesel Turbo engine and related systems based on available lookup data.<\/p>\n

Engine Oil & Filter<\/h3>\n
\n\n\n\n
Product Name<\/th>\nViscosity\/Grade<\/th>\nPart Code<\/th>\n<\/tr>\n
AMSOIL 0W-20 100% Synthetic Diesel Oil<\/td>\n0W-20 (SEOA5)<\/a><\/td>\nDP020QT-EA<\/a><\/td>\n<\/tr>\n<\/table>\n<\/div>\n
\n\n\n\n
Filter Type<\/th>\nPart Number<\/th>\n<\/tr>\n
WIX Oil Filter<\/td>\nWL10351-EA<\/a><\/td>\n<\/tr>\n<\/table>\n<\/div>\n

Transmission & Transfer Case<\/h3>\n
\n\n\n\n\n\n\n
Application<\/th>\nProduct Name<\/th>\nPart Code<\/th>\n<\/tr>\n
Automatic Transmission<\/td>\nAMSOIL Signature Series ULV 100% Synthetic ATF<\/td>\nULVPK-EA<\/a><\/td>\n<\/tr>\n
Automatic Transmission<\/td>\nAMSOIL Signature Series Fuel-Efficient 100% Synthetic ATF<\/td>\nATLPK-EA<\/a><\/td>\n<\/tr>\n
Automatic Transmission<\/td>\nAMSOIL OE Fuel-Efficient 100% Synthetic ATF<\/td>\nOTLQT-EA<\/a><\/td>\n<\/tr>\n
Transfer Case<\/td>\nAMSOIL Signature Series Fuel-Efficient 100% Synthetic ATF<\/td>\nATLPK-EA<\/a><\/td>\n<\/tr>\n<\/table>\n<\/div>\n

Coolant & Brake Fluid<\/h3>\n
\n\n\n\n\n\n
Application<\/th>\nProduct Name<\/th>\nPart Code<\/th>\n<\/tr>\n
Engine Coolant<\/td>\nAMSOIL Passenger Car & Light Truck Antifreeze & Coolant<\/td>\nANTPC1G-EA<\/a><\/td>\n<\/tr>\n
Engine Coolant<\/td>\nAMSOIL Propylene Glycol Antifreeze and Engine Coolant<\/td>\nANT1G-EA<\/a><\/href><\/td>\n<\/tr>\n
Brake Fluid<\/td>\nAMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid<\/td>\nNot confirmed from source data<\/td>\n<\/tr>\n<\/table>\n<\/div>\n

Differential\/Gear Lube<\/h3>\n
\n\n\n\n
Product Name<\/th>\nPart Code<\/th>\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 & Details<\/h2>\n

Proper lubrication is vital for the 3.0L LM2 Turbo Diesel engine to ensure longevity and performance under heavy loads.<\/p>\n

Oil Viscosity and Capacity<\/h3>\n
\n\n\n\n\n\n
Specification<\/th>\nValue<\/th>\n<\/tr>\n
Viscosity<\/td>\n0W-20 (All TEMPS)<\/td>\n<\/tr>\n
Oil Grade (AMSOIL lookup)<\/td>\nSEOA5<\/td>\n<\/tr>\n
Capacity (with filter)<\/td>\n7.0 Quarts<\/td>\n<\/tr>\n<\/table>\n<\/div>\n

Service Specifications<\/h3>\n