2015 GMC Sierra 2500HD Oil Capacity & Filter Guide

The 2015 GMC Sierra 2500HD takes 6.0 quarts (5.7 liters) of oil for the 6.0L V8 gasoline engine, and 10.0 quarts (9.5 liters) for the 6.6L Duramax V8 diesel engine.

Quick answer

Here's a quick reference for your 2015 GMC Sierra 2500HD:

• 6.0L L96 Vortec V8 (Gasoline):
  • Oil Capacity: 6.0 quarts (5.7 liters)
  • Recommended Oil Weight: SAE 5W-30
  • Oil Specification: Dexos1 Gen2 (or newer, Dexos1 Gen3 is generally compatible and preferred)
  • Oil Filter (OEM): Consult dealer for specific part number, often AC Delco PF48E or equivalent.
  • Oil Filter (Aftermarket Cross-Reference):
    • Fram: PH10060
    • Wix: 57045
• 6.6L LML Duramax V8 (Diesel):
  • Oil Capacity: 10.0 quarts (9.5 liters)
  • Recommended Oil Weight: SAE 15W-40 (preferred) or SAE 5W-40 (for cold weather operation below -20°F (–29°C))
  • Oil Specification: API CJ-4 or, for newer protection, API CK-4 (backward compatible)
  • Oil Filter (OEM): Consult dealer for specific part number, often AC Delco PF2232 or equivalent.
  • Oil Filter (Aftermarket Cross-Reference):
    • Fram: CH11488
    • Wix: 57202

Capacity by engine option

Oil change interval

Maintaining the correct oil change interval is crucial for engine longevity.

• Normal Duty: For gasoline engines, typically 7,500 miles or 12 months, whichever comes first. Always follow the Oil Life Monitoring System (OLMS) in your vehicle, which is the most accurate indicator. For diesel engines, the interval is often 7,500 miles (12,000 km) or 12 months under normal conditions, or as indicated by the OLMS.
• Severe Duty: If you frequently tow heavy loads, drive in extreme temperatures, idle for extended periods, or drive in dusty conditions, your vehicle is operating under severe duty. In these cases, it's recommended to shorten your oil change interval significantly. For gasoline engines, this might be around 3,000-5,000 miles. For diesel engines, severe duty may necessitate intervals as short as 5,000 miles (8,000 km). Again, consult your owner's manual and the OLMS.

Drain plug torque

• 6.0L L96 Vortec V8 (Gasoline): The oil drain plug typically requires a torque of 18 ft-lbs (24 Nm). Always use a new drain plug gasket or crush washer to ensure a proper seal and prevent leaks.
• 6.6L LML Duramax V8 (Diesel): The oil drain plug typically requires a torque of 33 ft-lbs (45 Nm). A new crush washer is also recommended for the Duramax.

How to change the oil

1. Warm up the engine: Drive the truck for a few minutes to bring the oil up to operating temperature, allowing it to flow more easily.
2. Lift and secure: Safely lift the front of the truck using a jack and secure it with jack stands. Never work under a vehicle supported only by a jack.
3. Locate and drain: Place a suitable drain pan under the oil pan. Locate the drain plug, remove it, and allow all the old oil to drain completely.
4. Replace drain plug: Once drained, reinstall the drain plug with a new crush washer and torque it to the specified setting.
5. Replace oil filter: Locate the oil filter. Place a small pan underneath, as some oil will leak out. Unscrew the old filter, ensuring the old gasket comes off with it. Apply a thin coat of new oil to the gasket of the new filter before screwing it on hand-tight, then an additional 3/4 to 1 full turn (refer to filter instructions).
6. Add new oil: Lower the truck. Remove the oil cap and carefully pour in the recommended amount of new, specified oil.
7. Check level: Start the engine and let it run for a minute to circulate the oil, then shut it off. Wait a few minutes for the oil to settle, then check the dipstick and add more oil if necessary to reach the "full" mark.
8. Inspect for leaks: Check around the drain plug and oil filter for any signs of leaks.

Common issues / tips

• Diesel Particulate Filter (DPF) Considerations (Diesel): For the 6.6L Duramax, using the correct low-ash API CJ-4 or CK-4 oil is critical for the longevity of the Diesel Particulate Filter (DPF). Using oils not meeting these specifications can clog the DPF and lead to expensive repairs.
• Oil Life Monitoring System (OLMS): Trust your vehicle's OLMS. It takes into account various factors like engine temperature, RPMs, and operating conditions to determine when an oil change is truly needed. Don't automatically adhere to traditional mileage intervals if the OLMS suggests otherwise.
• Gasoline Direct Injection (GDI) & LSPI (Gasoline): While the 6.0L L96 isn't a direct-injection engine, using Dexos1 Gen2 (or Gen3) oil is still important. These newer specifications are engineered to help prevent Low-Speed Pre-Ignition (LSPI), which can be an issue in modern engines, and provide superior engine protection.
• Proper Disposal: Always dispose of used oil and oil filters responsibly at an approved recycling center.

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