What oil does a 2024 GMC Sierra 3500 6.6L L5P Diesel take?
For the 2024 GMC Sierra 3500 Pickup with the 6.6L 8-cylinder L5P Diesel Turbo engine, the recommended oil viscosity is 15W-40 for ambient temperatures above -18°C (0°F). When temperatures drop below 0°F (-18°C), use 5W-40 to improve cold starting. The total oil capacity is 10 quarts with a filter change. AMSOIL recommends using Signature Series 15W-40 Max-Duty Diesel Oil or Heavy-Duty 15W-40 Synthetic Diesel Oil.
AMSOIL product recommendations
The following AMSOIL products are specifically listed for the 2024 GMC Sierra 3500 6.6L L5P Diesel engine and related maintenance components.
Engine Oil Options
| Product Name | Viscosity | Part Code |
|---|---|---|
| AMSOIL Signature Series Max-Duty Diesel Oil | 15W-40 | DMEQT-EA |
| AMSOIL Heavy-Duty 100% Synthetic Diesel Oil | 15W-40 | ADPQT-EA |
Note: 5W-40 is recommended for all temperatures or when ambient temperature is below -18°C.
Oil Filter Options
| Product Name | Part Code |
|---|---|
| AMSOIL Oil Filter | EAO17-EA |
| WIX XP Oil Filter | WL10255XP-EA |
| WIX Oil Filter | WL10255-EA |
Coolant & Transmission Fluids
| Product Name | Part Code |
|---|---|
| AMSOIL Passenger Car & Light Truck Antifreeze & Coolant | ANTPC1G-EA |
| AMSOIL Propylene Glycol Antifreeze and Engine Coolant | ANT1G-EA |
| AMSOIL Signature Series ULV 100% Synthetic ATF | ULVPK-EA |
| AMSOIL Signature Series Fuel-Efficient 100% Synthetic ATF | ATLPK-EA |
Engine Oil Specifications and Details
Proper lubrication is critical for the L5P diesel engine to manage high-torque demands and soot loading. Always verify your specific requirements against the owner’s manual.
Oil Viscosity & Capacity
| Parameter | Specification/Value |
|---|---|
| Oil Viscosity (Above -18°C) | 15W-40 |
| Oil Viscosity (All Temps) | 5W-40 |
| Oil Capacity (with filter) | 10 quarts |
| Oil Specification (CJ-4) | Confirmed from source data |
Drain Plug Torque
| Component | Torque Value |
|---|---|
| Oil Drain Plug | 18 ft/lbs |
Note: Always replace the drain plug seal when performing an oil change.
Diesel maintenance notes for this vehicle
- Cold Start Protection: When ambient temperatures are below 0°F (-18°C), use a 5W-40 viscosity to improve engine starting performance.
- Oil Level Verification: After refilling the engine with 10 quarts of oil, always check the oil level to ensure accuracy.
- Coolant Capacity: The cooling system capacity is approximately 15.4 quarts.
- Filter Efficiency: High-quality filters like the AMSOIL Oil Filter provide 99 percent filtering efficiency at 20 microns.
Common diesel oil-related concerns and how AMSOIL products may help
Diesel engines face unique challenges such as soot accumulation and high thermal stress. The following table outlines how specific AMSOIL products can support engine longevity.
| Concern | Why it matters | AMSOIL product from this lookup | How it may help | Important limitation |
|---|---|---|---|---|
| Wear Protection | High-pressure diesel components require extreme lubrication. | DMEQT-EA | Delivers up to 6X more wear protection in specific tests. | Based on third-party testing (Detroit Diesel DD13). |
| Soot & Sludge | Diesel combustion produces soot that can degrade oil quality. | DMEQT-EA | Maintains proper viscosity and minimizes oil consumption. | Requires regular service intervals. |
| Contaminant Removal | Small particles can cause abrasive wear in the engine. | EAO17-EA | Provides 99% efficiency at 20 microns to capture wear-causing contaminants. | Filter must be replaced according to service schedule. |
Common maintenance concerns for this vehicle
Based on NHTSA data, owners of the 2024 GMC Sierra 3500 should be aware of several reported areas of concern. Note that these are owner reports and not verified defects.
- Power Train & Fuel Systems: Some complaints involve transmission valve body issues or fuel system concerns (e.g., potential gasoline contamination).
- Steering Components: There have been reports regarding control arm bearings and steering control.
- Tailgate Operation: Electronic gate-release switches may be susceptible to water intrusion.
Recall, TSB, and manufacturer communication notes
The following official recalls have been identified for the 2024 GMC Sierra 3500. Owners should always verify their specific VIN with a dealer to confirm open recalls.
- Steering Gear Shaft (Campaign 23V549000): The steering gear shaft may fracture and disconnect from the steering arm, potentially causing loss of control.
- Tailgate Latch (Campaign 24V060000 & 24V894000): The electronic gate-release switch may short circuit due to water intrusion, which could cause the tailgate to unlatch inadvertently while driving.
About this vehicle
The 2024 GMC Sierra 3500 is a heavy-duty pickup truck designed for high-capacity utility, often serving as a chassis cab or a platform intended for significant towing and hauling tasks. It belongs to the broader GM full-size truck family and shares significant mechanical commonality with the Chevrolet Silverado.
The engine specified, the 6.6L 8-cylinder diesel (identified by the L5P designation), represents a modern iteration of GM’s Duramax technology. This engine is known for heavy-duty performance, making it a preferred choice for owners who prioritize high torque and durability under load. Maintenance for this vehicle typically focuses on supporting high-stress diesel operations, which includes maintaining fuel system integrity, cooling efficiency, and rigorous oil service to manage soot and prevent sludge.
Because these vehicles are often used in severe service environments—such as heavy towing or extended idling—owners frequently research maintenance schedules that prioritize specialized filtration and high-quality lubricants to ensure the longevity of the L5P engine and its associated components. As with all modern diesel platforms, maintaining exhaust aftertreatment systems and cooling efficiency is a key part of long-term ownership.
Common questions about this vehicle’s diesel oil and maintenance
How much oil does my 6.6L L5P Duramax take?
The engine requires 10 quarts of oil when performing a service that includes a filter change.
What is the correct oil viscosity for winter driving?
For temperatures below 0°F (-18°C), AMSOIL recommends using a 5W-40 viscosity to improve cold starting performance.
Can I use any diesel oil in my Sierra 3500?
The AMSOIL lookup note specifies CJ-4 for this application. It is important to use an oil that meets the required specifications for your engine’s needs.
How often should I change my oil filters?
While specific intervals depend on driving conditions, using high-efficiency filters like the EAO17-EA can help manage contaminants effectively during service intervals.
What should I do about the tailgate recall?
If your vehicle is part of the electronic gate-release switch recall, dealers will replace the exterior touchpad switch assemblies free of charge. Verify your VIN with a GMC dealer.
Does AMSOIL offer heavy-duty options for my truck?
Yes, AMSOIL offers several options including the Signature Series Max-Duty Diesel Oil (DMEQT-EA) designed for extreme protection.
Disclaimer: This information is sourced from AMSOIL and NHTSA data. Always consult your vehicle’s owner’s manual and verify all maintenance specifications and recall status using your VIN before performing service.