For the 2019 GMC Sierra 2500 HD Pickup with the 6.6L 8-cylinder L5P Diesel Turbo engine, the oil capacity is 10 quarts (with filter). The preferred viscosity for temperatures above -18°C is SAE 15W-40, though 5W-40 is recommended for all temperatures when ambient conditions are below 0°F (-18°C) to improve cold starting. AMSOIL recommends using Signature Series 15W-40 Max-Duty Diesel Oil (DMEQT-EA) paired with an AMSOIL Oil Filter (EAO52-EA).
What oil does a 2019 GMC Sierra 2500 HD L5P take?
The 2019 GMC Sierra 2500 HD with the 6.6L L5P diesel engine requires an oil grade of CJ-4. For most operating conditions, SAE 15W-40 is preferred for temperatures above -18°C. However, if you operate in environments where ambient temperatures drop below 0°F (-18°C), using a 5W-40 viscosity is recommended to improve cold starting performance.
The total engine oil capacity for this vehicle is 10 quarts when performing a service that includes replacing the oil filter. It is important to check the oil level after refilling to ensure accuracy. Additionally, the oil drain plug should be torqued to 18 ft/lbs.
AMSOIL product recommendations
Based on the AMSOIL lookup for your 2019 GMC Sierra 2500 HD, here are the recommended fluids and filters to maintain peak performance.
Engine Oil Options
| Product Name | Viscosity | Code |
|---|---|---|
| AMSOIL Signature Series Max-Duty Diesel Oil | 15W-40 | DMEQT-EA |
| AMSOIL Heavy-Duty 100% Synthetic Diesel Oil | 15W-40 | ADPQT-EA |
Oil Filter Options
| Product Name | Code |
|---|---|
| AMSOIL Oil Filter | EAO52-EA |
| WIX XP Oil Filter | 57202XP-EA |
| WIX Oil Filter | 57202-EA |
Other Essential Maintenance Products
| Component | Product Name | Code |
|---|---|---|
| Air Filter | WIX Air Filter [1] | WA10695-EA |
| Coolant | AMSOIL Passenger Car & Light Truck Antifreeze & Coolant | ANTPC1G-EA |
| Coolant | AMSOIL Propylene Glycol Antifreeze and Engine Coolant | ANT1G-EA |
How much oil does it take with a filter change?
Engine Oil Specifications and Details
Maintaining the correct oil specification is vital for the longevity of the L5P diesel engine. The AMSOIL lookup confirms the following requirements:
- Oil Grade: CJ-4
- Preferred Viscosity (Above -18°C): 15W-40
- Cold Weather Viscosity (Below -18°C): 5W-40
- Drain Plug Torque: 18 ft/lbs
Diesel maintenance notes for this vehicle
Owners of the L5P diesel engine should prioritize high-quality filtration and specific oil viscosity requirements to manage the thermal loads associated with heavy towing. Key areas of focus include:
- Fuel System: Regular fuel filter replacement is essential to protect high-pressure injection components.
- Turbocharger Health: Monitor intake systems and turbocharger integrity.
- Cooling System: Ensure proper coolant levels and quality to manage engine temperatures.
- DEF Service: Adhere strictly to Diesel Exhaust Fluid (DEF) service intervals.
Common diesel oil-related concerns and how AMSOIL products may help
Diesel engines face unique stresses such as soot loading and extreme thermal demands. The following table outlines how specific AMSOIL products can support your maintenance needs.
| Concern | Why it matters | AMSOIL Product | How it may help | Limitation |
|---|---|---|---|---|
| Engine Wear | High-pressure diesel environments cause friction. | DMEQT-EA | Delivers up to 6X more wear protection. | Requires regular oil changes. |
| Cold Starts | Thick oil can hinder lubrication in winter. | 5W-40 Viscosity | Improves cold starting at temperatures below 0°F. | Not a repair for mechanical issues. |
| Contaminants | Small particles can cause abrasive wear. | EAO52-EA | 99% efficiency at 20 microns. | Must be replaced per interval. |
Common maintenance concerns for this vehicle
Based on owner reports and research, owners of the 2019 GMC Sierra 2500 HD should be aware of several areas that may require attention:
- Electrical Systems: Some users have reported issues with electrical components or wiring.
- Fuel System Integrity: There are reports regarding fuel tank failures and unexpected loss of motive power; regular inspections are advised.
- Engine Block Heater: Potential for short-circuits in the heater cord or terminals has been noted in manufacturer communications.
Recall, TSB, and manufacturer communication notes
The following recall information was identified via NHTSA research. Always verify your specific vehicle’s status by checking your VIN with a certified dealer.
- Engine Block Heater Recall (Campaign 21V496000 & 19V328000): Certain models may have an electrical short-circuit risk in the engine-block heater cable or terminals, which could increase fire risk.
- Fuel System Recall (Campaign 23V047000): Research indicates a recall related to the diesel fuel storage tank assembly for certain 2017-2019 models.
About this vehicle
The 2019 GMC Sierra 2500 HD is a heavy-duty pickup truck manufactured by General Motors, built on a platform that shares significant mechanical and chassis commonality with the Chevrolet Silverado. This model year features the 6.6L L5P diesel engine, a specialized powertrain designed for high-capacity utility applications such as towing and hauling.
The L5P is recognized as a heavy-duty diesel application where owners typically focus on long-term durability. Maintenance context for this vehicle often revolves around managing the thermal loads associated with heavy work, which makes rigorous adherence to service intervals for engine oil, fuel filters, and cooling systems critical. Because these trucks are frequently used in commercial or high-stress environments, maintaining high-quality filtration and proper fluid viscosity is a cornerstone of ownership.
Note: While this vehicle is designed for heavy-duty use, all specific performance metrics and maintenance intervals should be verified using the official owner’s manual or a certified service database.
Common questions about this vehicle’s diesel oil and maintenance
What is the recommended oil viscosity for my L5P engine?
For temperatures above -18°C, SAE 15W-40 is preferred. If you operate in temperatures below 0°F (-18°C), use 5W-40 to improve cold starting.
How often should I change my oil filter?
While specific intervals depend on usage, AMSOIL filters like the 57202XP-EA are designed to offer extended service life and high efficiency.
Can I use a different oil grade?
The AMSOIL lookup for this vehicle specifies an oil grade of CJ-4. Always ensure your chosen oil meets the required specifications for your engine type.
What should I do if my truck has an engine block heater recall?
If your vehicle is part of a recall regarding the engine block heater (such as Campaign 21V496000), contact a GMC dealer. They will replace the heater or cords free of charge.
Does my truck need special coolant?
The AMSOIL lookup lists options like ANTPC1G-EA, which is engineered to exceed OEM requirements and protect all cooling system metals.
How do I verify if my 2019 Sierra has an open recall?
You should always provide your VIN to a certified dealer or use the official NHTSA website to check for any active recalls or manufacturer communications specific to your vehicle.
Disclaimer: Not all information provided is verified by the manufacturer. Always consult your owner’s manual and a professional mechanic before performing maintenance.