For the 2023 Chevrolet Tahoe equipped with the 3.0L 6-cylinder LM2 T Diesel Turbo engine, the oil capacity is 7 quarts (with filter). The recommended viscosity for all temperatures is 0W-20. AMSOIL recommends using AMSOIL 0W-20 100% Synthetic Diesel Oil (DP020QT-EA) paired with a WIX Oil Filter (WL10351-EA) for optimal protection.
What oil does a 2023 Chevrolet Tahoe 3.0L Diesel take?
The 2023 Chevrolet Tahoe 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 note states 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 Tahoe 3.0L Diesel engine maintenance.
Engine Oil & Filter
| Product Name | Code |
|---|---|
| AMSOIL 0W-20 100% Synthetic Diesel Oil | DP020QT-EA |
| WIX Oil Filter | WL10351-EA |
Coolant & Antifreeze
| Product Name | Code |
|---|---|
| AMSOIL Passenger Car & Light Truck Antifreeze & Coolant | ANTPC1G-EA |
| AMSOIL Propylene Glycol Antifreeze and Engine Coolant | ANT1G-EA |
Transmission & Transfer Case
| Product Name | Code |
|---|---|
| AMSOIL Signature Series ULV 100% Synthetic ATF | ULVPK-EA |
| AMSOIL Signature Series Fuel-Efficient ATF | ATLPK-EA |
| AMSOIL OE Fuel-Efficient 100% Synthetic ATF | OTLQT-EA |
| AMSOIL Signature Series Fuel-Efficient ATF (Transfer Case) | ATLPK-EA |
Engine Oil Specifications
| Viscosity | Oil Grade (AMSOIL Lookup) |
|---|---|
| 0W-20 | SEOA5 |
Engine Oil Capacity
| Description | Capacity |
|---|---|
| With Filter Change | 7 quarts |
Note: After refill, always check the oil level.
Oil Drain Plug Torque Specs
| Component | Torque Value |
|---|---|
| Oil Drain Plug | 18 ft/lbs |
Note: Always replace the drain plug seal.
How much transmission fluid does it take?
Transmission capacity varies based on your specific cooling setup for the 10-speed transmission (10L80/MQC or 10L80/MHS). For both configurations, the total fill with an external cooler is approximately 11.5 quarts, while a system with a standard cooler requires 12 quarts. The initial fill capacity is listed at 8.1 quarts.
Automatic Transmission Capacity
| Configuration | Total Fill Capacity |
|---|---|
| 10-speed with O Cooler (MQC/MHS) | 11.5 quarts |
| 10-speed with Cooler (MQC/MHS) | 12 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 are available under DEXRON ULV and MERCON ULV tradenames.
Transfer Case Maintenance
For transfer case models MP3015 or 25 (AF6), the capacity is 3.2 pints. You should check the tag on the case for identification. When servicing, apply high-performance thread sealant to the threads of both the drain and fill plugs before installation.
| Component | Torque Spec |
|---|---|
| Transfer Case Drain Plug | 15 ft/lbs |
| Transfer Case Fill Plug | 15 ft/lbs |
Coolant Specifications and Capacities
The cooling system requires attention to both the engine and the charge air cooling system. The engine capacity is 15.5 quarts, while the Charge Air Cooling System requires 6.1 quarts.
| System | Capacity |
|---|---|
| Engine | 15.5 quarts |
| Charge Air Cooling System | 6.1 quarts |
Diesel maintenance notes for this vehicle
- Oil Level: Always check the oil level after refilling the engine.
- Drain Plug: Ensure you replace the drain plug seal during every oil change to prevent leaks.
- Transfer Case: Use high-performance thread sealant on the drain and fill plug threads.
- Diesel Specifics: As a Duramax diesel, owners should focus on fuel quality, Diesel Exhaust Fluid (DEF) management, and specific filtration requirements to maintain turbocharger health.
Common maintenance concerns for this vehicle
Based on NHTSA data, owners of the 2023 Chevrolet Tahoe have reported various concerns. While these are owner reports and not verified defects, they highlight areas for regular inspection:
- Engine & Cooling: Some owners have reported engine-related issues including stalling or total engine failure. Regular monitoring of engine temperature and oil pressure is advised.
- Electrical/Software: Reports exist regarding software updates affecting vehicle systems (such as wipers). Ensure your vehicle’s software is kept up to date via authorized dealer channels.
- Braking Systems: Some reports mention issues with the electronic brake control module warning lights.
Common diesel oil-related concerns and how AMSOIL products may help
| Concern | Why it matters | AMSOIL Product | How it may help | Important Limitation |
|---|---|---|---|---|
| Wear Protection | Diesel engines face high pressure and friction. | DP020QT-EA | Delivers up to 6X more wear protection than leading industry standards. | Based on OM646LA cam wear test. |
| Temperature Extremes | Cold starts or high heat can degrade oil. | DP020QT-EA | Excels in hot and cold temperature extremes. | Not confirmed for all specific engine loads. |
| Heavy Towing/Heat | Transmission fluid can overheat under load. | ULVPK-EA | Withstands rigors of heavy towing and elevated temperatures. | Requires proper fill levels. |
Recall, TSB, and manufacturer communication notes
NHTSA research indicates several recall campaigns for the 2023 Chevrolet Tahoe. Always verify your specific vehicle’s status by contacting a dealer with your VIN.
- Lighting Control: A recall (Campaign 22V903000) was issued because daytime running lights (DRLs) may not deactivate when headlights are on, potentially causing glare.
- Suspension: A recall (Campaign 23V642000) involves rear suspension outer control arm bolts that may not have been properly heat-treated, which could lead to breakage and misalignment.
- Brake Warning: A recall (Campaign 24V674000) concerns the electronic brake control module software failing to display a warning light.
About this vehicle
The 2023 Chevrolet Tahoe is a full-size SUV that serves as a shorter-wheelbase variant of the long-standing Chevrolet Suburban. As part of Chevrolet’s lineup of large SUVs, the Tahoe has historically been a high-volume seller in the United States, designed to provide significant utility and passenger capacity.
This specific model is equipped with a 3.0L 6-cylinder diesel engine identified by the code LM2. This falls under the GM Duramax diesel umbrella. The Duramax line is generally recognized for its heavy-duty capabilities and efficiency in large-format vehicles like the Tahoe and Silverado.
Typical use cases for this vehicle include heavy-duty towing, long-distance highway cruising, and large-capacity passenger transport. From a maintenance perspective, diesel engines of this type require specialized attention compared to gasoline counterparts. Owners should focus on fuel quality, diesel exhaust fluid (DEF) management, and specific filtration requirements to maintain turbocharger health and emissions compliance. Because technical specifications can vary, all service intervals and component tolerances should be cross-referenced with the official GM owner’s manual.
Common questions about this vehicle’s diesel oil and maintenance
What is the correct oil viscosity for my 2023 Tahoe Diesel?
The recommended viscosity is 0W-20 for all temperatures. The AMSOIL lookup lists DP020QT-EA for this application.
How much oil do I need for an oil change?
You will need 7 quarts of oil when performing a change that includes a new filter.
Can I use Dexos D oil in my Tahoe?
Yes, 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.
What should I do about the rear suspension recall?
If your vehicle is part of recall 23V642000, dealers will replace both rear suspension outer control arm bolts free of charge. Verify your VIN with a Chevrolet dealer.
Does AMSOIL provide transmission fluid for the 10-speed?
Yes, AMSOIL lists ULVPK-EA for the 10L80/MQC and 10L80/MHS transmissions.
How often should I change my coolant?
While specific intervals are not in this lookup, AMSOIL products like ANTPC1G-EA offer protection for up to 150,000 miles or 5 years. Always consult your owner’s manual for the manufacturer’s recommended interval.
Disclaimer: This information is derived from provided source data. Always verify all maintenance specifications, torque values, and capacities in your official vehicle owner’s manual before performing service.