For the 2014 GMC Sierra 3500 Pickup with the 6.6L 8-cylinder LML Diesel Turbo engine, the oil capacity is 10 quarts (including filter replacement). 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 paired with an AMSOIL oil filter for optimal protection.
What oil does a 2014 GMC Sierra 3500 6.6L LML take?
The engine requires an oil with a CJ-4 specification. For standard operating temperatures above -18°C (0°F), SAE 15W-40 is the preferred viscosity. If you operate in extreme cold where ambient temperatures drop below 0°F (-18°C), it is recommended to use 5W-40 to improve engine cold starting performance.
AMSOIL product recommendations
Based on the vehicle lookup data, the following AMSOIL products are recommended for your 2014 GMC Sierra 3500 LML diesel engine maintenance.
Engine Oil Options
| Product Name | Code |
|---|---|
| AMSOIL Signature Series 15W-40 100% Synthetic Max-Duty Diesel Oil | DMEQT-EA |
| AMSOIL 15W-40 Heavy-Duty 100% Synthetic Diesel Oil | ADPQT-EA |
Oil Filter Options
| Product Name | Code |
|---|---|
| AMSOIL Oil Filter | EAO52-EA |
| WIX XP Oil Filter | 57202XP-EA |
| WIX Oil Filter | 57202-EA |
Air & Coolant Recommendations
| Component | Product Name | Code |
|---|---|---|
| Air Filter | WIX Air Filter [1] | 49314-EA |
| Coolant | AMSOIL Passenger Car & Light Truck Antifreeze & Coolant | ANTPC1G-EA |
| Coolant | AMSOIL Propylene Glycol Antifreeze and Engine Coolant | ANT1G-EA |
Engine Oil Specifications
| Specification | Details |
|---|---|
| Oil Grade | CJ-4 |
Viscosity Guide
| Condition | Recommended Viscosity |
|---|---|
| Above -18°C | SAE 15W-40 (Preferred) |
| Below -18°C (0°F) | 5W-40 (For cold starting) |
How much oil does it take with a filter change?
The total capacity for the 6.6L LML engine is 10 quarts when performing an oil change that includes replacing the oil filter. It is essential to check the oil level after refilling to ensure accuracy.
Oil Change Specifications
| Metric | Value |
|---|---|
| Total Capacity | 10 quarts (with filter) |
| Oil Drain Plug Torque | 18 ft/lbs |
Common diesel oil-related concerns and how AMSOIL products may help
Diesel engines operating under heavy loads or in extreme environments face unique lubrication challenges. The following table outlines common concerns for the LML engine.
| Concern | Why it matters | AMSOIL product from this lookup | How it may help | Important limitation |
|---|---|---|---|---|
| Cold Starting | Thick oil can hinder lubrication during startup in freezing weather. | DMEQT-EA (5W-40 option) | Provides better flow at low temperatures. | Must match temperature requirements. |
| Engine Wear | High-pressure diesel systems and heavy loads increase friction. | DMEQT-EA | Delivers up to 6X more wear protection. | Requires regular maintenance. |
| Contaminants | Soot and small particles can cause abrasive wear. | EAO52-EA | 99% efficiency at 20 microns; greater capacity for small contaminants. | Filter must be replaced per interval. |
| Fuel Efficiency | Diesel fuel costs are a major operational expense. | DMEQT-EA | Designed to maximize fuel efficiency. | Depends on driving conditions. |
Diesel maintenance notes for this vehicle
- Oil Level Verification: Always check the oil level after refilling during an oil change.
- Drain Plug Torque: Ensure the oil drain plug is tightened to 18 ft/lbs to prevent leaks or damage.
- Filter Capacity: Using high-quality filters like the AMSOIL Oil Filter can provide greater capacity for small, wear-causing contaminants compared to competing filters.
Common maintenance concerns for this vehicle
Based on NHTSA data, owners of the 2014 GMC Sierra series have reported various issues. Note that these are owner reports and not verified manufacturer defects.
- Steering: Some owners have reported steering wheel stiffness or difficulty turning, which may involve power steering modules or tie rods.
- Fuel System: There is a known recall regarding dual fuel tanks where low fuel level sensors could cause overfilling and potential tank expansion/leaks.
- Fire Extinguishers: A recall was issued for certain plastic-handle fire extinguishers that may become clogged or detach.
Recall, TSB, and manufacturer communication notes
Official NHTSA research indicates the following recalls for the 2014 GMC Sierra 3500:
- Campaign 18V267000: Relates to certain plastic-handle fire extinguishers that may fail to discharge or detach.
- Campaign 17V664000: Relates to dual fuel tank configurations where the front tank could overfill due to a sticking sensor, potentially causing a leak.
Note: Always verify open recalls by checking your specific VIN through the GM website or NHTSA.
About this vehicle
The 2014 GMC Sierra 3500 is a heavy-duty pickup truck manufactured by General Motors, designed for high-capacity workhorse applications such as towing and hauling. This model shares significant mechanical commonality with the Chevrolet Silverado HD. It is frequently utilized in agricultural, construction, and commercial transport sectors where reliability under stress is paramount.
This specific vehicle features the 6.6L 8-cylinder LML diesel engine, a part of the Duramax diesel line. The Duramax engines are recognized for their role in high-torque applications and are central to GM’s heavy-duty diesel offerings. Because these vehicles are often subjected to high-stress operating conditions, maintenance is a critical priority. Owners should focus on fuel system integrity, turbocharger health, and emissions system upkeep. Given the high-pressure common rail diesel systems used in the LML engine, specialized fluid intervals and filtration needs are essential for long-term durability.
Maintenance research typically emphasizes the importance of maintaining proper viscosity to handle heavy loads and ensuring that filtration systems can manage the unique soot loading and contaminants found in diesel combustion.
Common questions about this vehicle’s diesel oil and maintenance
What is the recommended oil viscosity for my 2014 LML Duramax?
For temperatures above -18°C, SAE 15W-40 is preferred. If you operate in environments below 0°F (-18°C), use 5W-40 to improve cold starting.
How often should I change my oil?
While specific intervals depend on usage, AMSOIL Signature Series products are designed to confidently extend drain intervals compared to standard oils.
Can I use a different oil grade for my Sierra 3500?
The engine requires an oil specification of CJ-4. Always ensure any product used meets this requirement or is approved by the manufacturer.
What should I do if my steering feels stiff?
Some owners have reported steering stiffness in NHTSA complaints. This may require professional diagnosis of the power steering module or mechanical components like tie rods.
Does my truck need a specific coolant?
The AMSOIL lookup lists ANTPC1G-EA and ANT1G-EA for this application. Always verify compatibility with your cooling system requirements.
How do I check for active recalls on my GMC Sierra?
You should contact a GM dealer or visit the NHTSA website and provide your Vehicle Identification Number (VIN) to check for any open safety recalls.
Disclaimer: This information is derived from provided source data. Always consult your official vehicle owner’s manual and professional service technicians before performing maintenance or selecting fluids.