For the 2023 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 (DP020QT-EA) and a WIX Oil Filter such as WL10351-EA for optimal protection.
What oil does a 2023 Chevrolet Suburban 3.0L Diesel take?
The 2023 Chevrolet Suburban with the 3.0L 6-cylinder LM2 T Diesel engine requires an oil viscosity of 0W-20 for all temperature ranges. 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.
AMSOIL product recommendations
Based on the AMSOIL lookup data, the following products are recommended for your 2023 Chevrolet Suburban 3.0L Diesel:
| Component | Product Name | Part Code |
|---|---|---|
| Engine Oil | AMSOIL 0W-20 100% Synthetic Diesel Oil | DP020QT-EA |
| Oil Filter | WIX Oil Filter | WL10351-EA |
| Coolant (Pre-mix) | AMSOIL Passenger Car & Light Truck Antifreeze & Coolant | ANTPC1G-EA |
| Coolant (Concentrate) | AMSOIL Propylene Glycol Antifreeze and Engine Coolant | ANT1G-EA |
| Automatic Transmission Fluid | AMSOIL Signature Series ULV 100% Synthetic ATF | ULVPK-EA |
| Transfer Case Fluid | AMSOIL Signature Series Fuel-Efficient 100% Synthetic ATF | ATLPK-EA |
| Transfer Case Fluid (Alt) | AMSOIL OE Fuel-Efficient 100% Synthetic ATF | OTLQT-EA |
Engine Oil Specifications
| Property | Specification |
|---|---|
| Viscosity | 0W-20 (All TEMPS) |
| AMSOIL Lookup Oil Grade | SEOA5 |
| OEM Specification | Not confirmed from source data |
Engine Oil Capacity
| Condition | Capacity |
|---|---|
| With Filter Change | 7 quarts |
Note: After refill, always check the oil level.
Engine Oil Service Details
- Oil Drain Plug Torque: 18 ft/lbs (Replace drain plug seal).
How much coolant and transmission fluid is required?
The cooling system requires 15.5 quarts for the engine and an additional 6.1 quarts for the Charge Air Cooling System. Transmission requirements vary based on whether the vehicle has a cooler; total fill capacities for the 10-speed units range from 11.5 to 12 quarts.
Coolant Capacities
| System | Capacity |
|---|---|
| Engine | 15.5 quarts |
| Charge Air Cooling System | 6.1 quarts |
Automatic Transmission Fluid (ATF) Capacities
The AMSOIL lookup notes the WSS-M2C949-A specification was developed by Ford and GM, available under DEXRON ULV and MERCON ULV tradenames.
| Configuration | Total Fill Capacity |
|---|---|
| 10-speed with Cooler (10L80/MQC or MHS) | 12 quarts |
| 10-speed without Cooler (10L80/MQC or MHS) | 11.5 quarts |
| Initial Fill | 8.1 quarts |
Transfer Case Lubricant Specifications
For the transfer case (MP3015, 25….AF6), the capacity is 3.2 pints. Always check the tag on the case for identification.
| Component | Torque Spec | Requirement |
|---|---|---|
| Drain Plug | 15 ft/lbs | Apply high performance thread sealant |
| Fill Plug | 15 ft/lbs | Apply high performance thread sealant |
Diesel maintenance notes for this vehicle
Maintaining a 3.0L Duramax diesel requires attention to specialized protocols. Because these engines operate under unique thermal and pressure profiles, owners should prioritize fuel quality and filtration. Key areas of focus include monitoring Diesel Exhaust Fluid (DEF) levels, managing Diesel Particulate Filter (DPF) regeneration cycles, and ensuring the longevity of turbocharger components through proper lubrication.
Common diesel oil-related concerns and how AMSOIL products may help
Proper lubrication is critical for high-torque diesel applications. The following table outlines common concerns and how specific AMSOIL products can support engine health.
| Concern | Why it matters | AMSOIL Product | How it may help | Limitation |
|---|---|---|---|---|
| Engine Wear | Diesel engines face high pressure/heat. | DP020QT-EA | Delivers up to 6X more wear protection than leading industry standards. | Requires regular oil changes. |
| Temperature Extremes | Cold starts or high heat can stress components. | DP020QT-EA | Excels in hot and cold temperature extremes. | Not a substitute for mechanical repair. |
| Transmission Heat | Heavy towing increases fluid stress. | ULVPK-EA | Withstands rigors of heavy towing and elevated temperatures. | Diagnosis required for existing failure. |
Common maintenance concerns for this vehicle
Based on owner reports, several areas may require monitoring:
- Transmission Performance: Some owners have reported shuddering or malfunctions at highway speeds.
- Engine Stability: Reports of engine shaking or rough running have been noted in consumer complaints.
- Coolant Systems: Issues regarding coolant control valves have been documented by users.
Note: NHTSA complaints are owner reports and should not be treated as verified defects.
Recall, TSB, and manufacturer communication notes
The following recalls have been identified for the 2023 Chevrolet Suburban via NHTSA research:
- Lighting Control Module: Software update may be required because daytime running lights (DRLs) may not deactivate when headlights are on.
- Rear Suspension: A recall exists regarding rear suspension outer control arm bolts that may not have been properly heat-treated, potentially leading to breakage.
Important: Always verify your specific vehicle’s open recalls by contacting a dealer or checking your VIN on the official NHTSA website.
About this vehicle
The 2023 Chevrolet Suburban is part of the twelfth generation of one of the longest-running automobile nameplates in history. As a full-size SUV, it combines wagon-style utility with the robust chassis and powertrain characteristics typically found in pickup trucks like the Chevrolet Silverado.
This specific model features the 3.0L 6-cylinder diesel engine (Engine Code [T] LM2 T Diesel Turbo). This powertrain is designed for high efficiency, significant torque, and durability, making it a preferred choice for owners engaged in heavy towing, long-distance cruising, and high-efficiency hauling. Because diesel engines operate under different thermal and pressure profiles than gasoline small-block engines, specialized maintenance protocols are essential.
Owners of the 3.0L Duramax variant often research topics such as Diesel Particulate Filter (DPF) regeneration cycles, fuel system priming, and the longevity of turbocharger components. Given its role in heavy-duty applications, maintaining fluid integrity is a cornerstone of long-term ownership.
Common questions about this vehicle’s diesel oil and maintenance
What is the oil capacity for my 2023 Suburban 3.0L Diesel?
The capacity is 7 quarts when replacing the oil filter. Always check the level after refilling.
What viscosity of oil should I use?
The recommended viscosity is 0W-20 for all temperature ranges, as specified in the AMSOIL lookup data.
Can I use Dexos D oil?
Yes, the AMSOIL lookup note states that vehicles originally using GM Dexos2 may use a GM Dexos D licensed engine oil of the appropriate viscosity grade.
How often should I change my transmission fluid?
While specific intervals are not provided in this data, AMSOIL Signature Series ULV is designed to withstand heavy towing and challenging terrain for extended use.
What should I do if my check engine light shows a coolant error?
Some owners have reported “Coolant Control Valve” messages. If this occurs, you should have the vehicle inspected by a professional technician.
How can I verify if my Suburban has an open recall?
You should contact a Chevrolet dealer or use your VIN on the official NHTSA website to check for active recalls regarding lighting or suspension components.
Disclaimer: This information is derived from provided AMSOIL and NHTSA data. Always consult your vehicle’s owner manual or a certified professional before performing maintenance.