What oil does a 2021 Chevrolet Silverado 1500 3.0L Diesel take?
The 2021 Chevrolet Silverado 1500 with the 3.0L 6-cylinder LM2 T Diesel engine requires a 0W-20 viscosity oil. For a standard oil change including the filter, the capacity is 7 quarts. AMSOIL recommends using AMSOIL 0W-20 100% Synthetic Diesel Oil (Code: DP020QT-EA) paired with a WIX oil filter for optimal protection.
AMSOIL product recommendations
Based on the AMSOIL lookup for the 3.0L LM2 T Diesel engine, the following products are recommended for your maintenance needs:
Engine Oil & Filter
| Product Name | Part Code |
|---|---|
| AMSOIL 0W-20 100% Synthetic Diesel Oil | DP020QT-EA |
| WIX Oil Filter | WL10351-EA |
Automatic Transmission & Transfer Case
| Product Name | Part Code |
|---|---|
| AMSOIL Signature Series ULV 100% Synthetic ATF | ULVPK-EA |
| AMSOIL OE Fuel-Efficient 100% Synthetic ATF | OTLQT-EA |
| AMSOIL Signature Series Fuel-Efficient ATF | ATLPK-EA |
Coolant & Gear Lubricants
| Product Name | Part Code |
|---|---|
| AMSOIL Passenger Car & Light Truck Antifreeze | ANTPC1G-EA |
| AMSOIL Propylene Glycol Antifreeze | ANT1G-EA |
| AMSOIL SEVERE GEAR® 75W-85 Synthetic Gear Lube | SVLPK-EA |
Engine Oil Specifications & Details
Proper lubrication is critical for the LM2 Turbo Diesel engine to manage heat and wear. Always verify your specific requirements against the owner’s manual.
Oil Viscosity and Grade
| Specification | Value |
|---|---|
| AMSOIL lookup oil grade | SEOA5 |
| Viscosity (All Temps) | 0W-20 |
Oil Capacity & Torque Specs
| Component | Capacity / Torque |
|---|---|
| Engine Oil Capacity (with filter) | 7 quarts |
| Oil Drain Plug Torque | 18 ft/lbs |
Note: Replace the drain plug seal during service. After refilling, always check the oil level.
OEM Compatibility Notes
The AMSOIL lookup note states that vehicles equipped with Diesel engines that originally used GM Dexos2 may use a GM Dexos D licensed engine oil of the appropriate viscosity grade.
Transmission & Transfer Case Fluid Data
This vehicle utilizes specific transmission requirements for the 10-speed automatic system (10L80).
Automatic Transmission Capacity
| Configuration | Total Fill Capacity |
|---|---|
| 10 speed with Cooler (10L80) | 12 quarts |
| 10 speed with Oil Cooler (10L80) | 11.6 quarts |
| Initial Fill | 8.1 quarts |
The AMSOIL lookup note references the WSS-M2C949-A specification, which was developed by Ford and GM. Products meeting this specification are available under DEXRON ULV and MERCON ULV tradenames.
Transfer Case Lubricant
| Specification | Value |
|---|---|
| Capacity (MP3015, 25) | 3.2 pints |
| Transfer Case Drain Plug Torque | 15 ft/lbs |
| Transfer Case Fill Plug Torque | 15 ft/lbs |
Note: Identification should be done by checking the tag on the case.
Coolant Specifications
| Component | Capacity |
|---|---|
| Engine Coolant | 20.5 quarts |
AMSOIL offers both a 50/50 pre-mix (ANTPC1G-EA) and a concentrated Propylene Glycol option (ANT1G-EA) which requires mixing with distilled or high-quality water.
Diesel maintenance notes for this vehicle
Because the 3.0L LM2 is a turbocharged diesel engine, maintenance protocols differ from gasoline variants. Owners should prioritize:
- High-quality fuel filtration: Essential for protecting modern diesel injection systems.
- Turbocharger protection: Adhering to specific oil change intervals designed for turbo-diesel lubrication requirements.
- Emissions monitoring: Monitoring Diesel Exhaust Fluid (DEF) levels if applicable to your specific configuration.
Common diesel oil-related concerns and how AMSOIL products may help
| Concern | Why it matters | AMSOIL Product | How it may help | Limitation |
|---|---|---|---|---|
| Wear Protection | Diesel engines face high pressure and friction. | DP020QT-EA | Delivers up to 6X more wear protection than leading industry standards in specific tests. | Requires proper service intervals. |
| Temperature Extremes | Cold starts and high heat affect viscosity. | DP020QT-EA | Excels in hot and cold temperature extremes. | Not a substitute for mechanical repair. |
| Transmission Heat | Heavy towing can overheat fluids. | ULVPK-EA | Withstands rigors of heavy towing and elevated temperatures. | Diagnosis may be required for existing damage. |
Common maintenance concerns for this vehicle
Based on owner reports, the following areas are worth monitoring:
- Transmission Performance: Some owners have reported transmission shudder during low-speed acceleration.
- Engine Integrity: Reports of metal shavings in oil or cylinder misfires suggest the importance of strict adherence to oil change intervals and high-quality filtration.
- Sealing Issues: Potential for water leaks around glass moldings or valve seal issues should be inspected during routine service.
Recall, TSB, and manufacturer communication notes
NHTSA research indicates several recalls for the 2021 Chevrolet Silverado 1500:
- Seat Belt Brackets: Certain models may have seat belt brackets not properly secured to the seat frame in the front-row center position.
- Seat Belt Bolts: Incorrect bolts may have been used at fastening locations, potentially preventing proper restraint during a crash.
- Tires: Some vehicles were manufactured with specific Continental tires subject to recall.
Disclaimer: These are summaries of official records. Owners should always verify open recalls by checking their unique VIN through the GM or NHTSA websites.
About this vehicle
The 2021 Chevrolet Silverado 1500 is a prominent member of General Motors’ fourth-generation full-size pickup lineup. This specific model features the 3.0L LM2 Turbo Diesel engine, which is part of the GM Duramax diesel family. Unlike the more common V8 gasoline variants, this turbocharged diesel powertrain is engineered for drivers seeking enhanced fuel efficiency and superior torque characteristics.
The Silverado is designed for a wide range of utility tasks, from daily driving to heavy-duty work applications such as towing trailers or long-distance highway cruising. Because modern diesel engines utilize complex emissions systems and turbocharging components, they require specialized maintenance protocols. Owners often research specific service intervals for the LM2 engine, as these differ significantly from traditional gasoline models. Maintaining high standards for fuel filtration and lubrication is a key part of ensuring the longevity of this advanced diesel powertrain.
Common questions about this vehicle’s diesel oil and maintenance
What is the oil capacity for my 3.0L Duramax?
The capacity is 7 quarts when performing an oil change with a filter replacement. Always check the level after refilling.
What viscosity should I use for the 2021 Silverado Diesel?
The recommended viscosity is 0W-20 for all temperature ranges, as specified in the AMSOIL lookup data.
Can I use Dexos2 oil in this diesel engine?
The AMSOIL lookup note indicates that vehicles originally using GM Dexos2 may use a GM Dexos D licensed engine oil of the appropriate viscosity grade.
How much transmission fluid does the 10-speed automatic take?
Capacity varies: it is approximately 12 quarts with a cooler, or 11.6 quarts with an oil cooler. The initial fill is roughly 8.1 quarts.
Does AMSOIL offer a solution for heavy towing?
ULVPK-EA&zo=1102880″>ULVPK-EA Signature Series ULV is designed to withstand the rigors of heavy towing and elevated temperatures.”>
How do I check for active recalls on my truck?
You should contact a Chevrolet dealer or visit the NHTSA website and provide your Vehicle Identification Number (VIN) to confirm any open recalls.
Verification Disclaimer: While this article is based on provided AMSOIL and NHTSA data, always consult your official vehicle owner’s manual and GM technical documentation before performing maintenance or repairs.