{"id":366,"date":"2026-06-04T17:26:28","date_gmt":"2026-06-04T21:26:28","guid":{"rendered":"https:\/\/www.worldsbestdieseloil.com\/oil-guide\/2014-gmc-sierra-2500-hd-pickup-6-6l-8-cyl-diesel-turbo-maintenance-guide\/"},"modified":"2026-06-04T17:26:28","modified_gmt":"2026-06-04T21:26:28","slug":"2014-gmc-sierra-2500-hd-pickup-6-6l-8-cyl-diesel-turbo-maintenance-guide","status":"publish","type":"post","link":"https:\/\/www.worldsbestdieseloil.com\/oil-guide\/2014-gmc-sierra-2500-hd-pickup-6-6l-8-cyl-diesel-turbo-maintenance-guide\/","title":{"rendered":"2014 GMC Sierra 2500 HD 6.6L LML 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

For the 2014 GMC Sierra 2500 HD equipped with the 6.6L LML Diesel Turbo engine, the oil capacity is 10 quarts (including filter replacement). The preferred viscosity for temperatures above -18\u00b0C is SAE 15W-40, though 5W-40 is recommended for all temperatures to improve cold starting when ambient temperatures drop below 0\u00b0F (-18\u00b0C). AMSOIL recommends using Signature Series 15W-40 Max-Duty Diesel Oil<\/a> (DMEQT-EA<\/a>) paired with an AMSOIL Oil Filter<\/a> (EAO52-EA<\/a>).<\/p>\n

What oil does a 2014 GMC Sierra 2500 HD LML take?<\/h2>\n

The 2014 GMC Sierra 2500 HD with the 6.6L LML engine requires an oil grade of CJ-4. For optimal performance in most climates, SAE 15W-40 is preferred for temperatures above -18\u00b0C. However, if you operate in environments where ambient temperatures frequently drop below 0\u00b0F (-18\u00b0C), using a 5W-40 viscosity is recommended to improve cold starting capabilities.<\/p>\n

AMSOIL product recommendations<\/h2>\n

Based on the AMSOIL lookup for your 2014 GMC Sierra 2500 HD, the following high-performance fluids and filters are recommended to maintain engine health and optimize service intervals.<\/p>\n

Engine Oil Options<\/h3>\n
\n\n\n\n\n
Product Name<\/th>\nViscosity<\/th>\nCode<\/th>\n<\/tr>\n
AMSOIL Signature Series Max-Duty Diesel Oil<\/td>\n15W-40<\/a><\/td>\nDMEQT-EA<\/a><\/td>\n<\/tr>\n
AMSOIL Heavy-Duty 100% Synthetic Diesel Oil<\/td>\n15W-40<\/a><\/td>\nADPQT-EA<\/a><\/td>\n<\/tr>\n<\/table>\n<\/div>\n

Oil Specification:<\/strong> CJ-4<\/p>\n

Oil Filter Options<\/h3>\n
\n\n\n\n\n\n
Product Name<\/th>\nCode<\/th>\n<\/tr>\n
AMSOIL Oil Filter<\/td>\nEAO52-EA<\/a><\/td>\n<\/tr>\n
WIX XP Oil Filter<\/td>\n57202XP-EA<\/a><\/td>\n<\/tr>\n
WIX Oil Filter<\/td>\n57202-EA<\/a><\/td>\n<\/tr>\n<\/table>\n<\/div>\n

Air & Coolant Recommendations<\/h3>\n
\n\n\n\n\n\n
Component<\/th>\nProduct Name<\/th>\nCode<\/th>\n<\/tr>\n
Air Filter<\/td>\nWIX Air Filter [1]<\/td>\n49314-EA<\/a><\/td>\n<\/tr>\n
Coolant<\/td>\nAMSOIL Passenger Car & Light Truck Antifreeze<\/td>\nANTPC1G-EA<\/a><\/td>\n<\/tr>\n
Coolant<\/td>\nAMSOIL Propylene Glycol Antifreeze<\/td>\nANT1G-EA<\/a><\/td>\n<\/tr>\n<\/table>\n<\/div>\n

Engine Oil Specifications & Details<\/h3>\n
\n\n\n\n\n\n\n
Specification<\/th>\nValue<\/th>\n<\/tr>\n
Oil Grade<\/td>\nCJ-4<\/td>\n<\/tr>\n
Preferred Viscosity (> -18\u00b0C)<\/td>\n15W-40<\/td>\n<\/tr>\n
Cold Start Viscosity (< 0\u00b0F)<\/td>\n5W-40<\/td>\n<\/tr>\n
Oil Drain Plug Torque<\/td>\n18 ft\/lbs<\/td>\n<\/tr>\n<\/table>\n<\/div>\n

Capacity Note:<\/strong> The engine holds 10 quarts with a filter. Always check the oil level after refilling.<\/p>\n

How much oil does it take with a filter change?<\/h2>\n

A complete oil and filter service for the 6.6L LML diesel engine requires 10 quarts of oil. It is critical to verify the oil level using the dipstick after the refill process to ensure the engine is properly lubricated before operation.<\/p>\n

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

Maintaining a Duramax diesel engine requires attention to specific high-stress components. Owners should prioritize:<\/p>\n