2023 GMC Sierra 2500HD Oil Capacity & Filter Specs

The 2023 GMC Sierra 2500HD takes either 8.0 quarts of oil for the 6.6L V8 gas engine or 10.0 quarts for the 6.6L Duramax V8 turbo-diesel engine, both including the oil filter. As an ASE-certified master technician, I regularly service these heavy-duty workhorses, and getting the exact oil specification and filter right is crucial to protecting your investment—whether you are hauling heavy equipment or cruising down the highway.

Quick answer

Here is the essential information you need before heading to the parts counter for your 2023 GMC Sierra 2500HD:

• Oil Capacity: 8.0 quarts (7.6L) for Gas / 10.0 quarts (9.5L) for Diesel.
• Recommended Weight: 5W-30 for the 6.6L Gas; 15W-40 (or 5W-40 for sub-zero temperatures) for the 6.6L Duramax Diesel.
• Oil Specification: dexos1 Gen 3 / API SP for Gas; dexosD / API CK-4 for Diesel.
• OEM Oil Filter: ACDelco PF63 (Gas) / ACDelco PF26 (Diesel).
• Aftermarket Cross-References (Gas): Fram PH10575, Wix WL10255, Mobil 1 M1-113A.
• Aftermarket Cross-References (Diesel): Fram PH9100, Wix 57202.

Capacity by engine option

Depending on how your 2500HD was optioned, you have one of two massive 6.6L powerplants. Below is a breakdown of their respective oil capacities and viscosity requirements.

Oil change interval

Your 2023 Sierra 2500HD is equipped with GM's Intelligent Oil-Life Monitor (IOLM) system, which calculates oil life based on engine temperatures, RPMs, and driving habits. However, as a best practice:

• Normal Duty: Follow the Oil Life Monitor. Usually, this prompts a change every 7,500 to 10,000 miles, or at least once a year.
• Severe Duty: If you frequently tow heavy loads, idle extensively, or drive in dusty environments, we recommend changing the oil every 5,000 miles or whenever the monitor drops below 20%, whichever comes first. Diesel engines, in particular, produce a lot of soot under heavy loads, and fresh oil is cheap insurance for your turbocharger.

Drain plug torque

• Torque Specification: 18 lb-ft (25 Nm) for both the gas and diesel engine oil pans.
• Crush Washer Note: The drain plug relies on a built-in rubber O-ring or a separate crush washer. Always inspect this seal. If the rubber is flattened, nicked, or dried out, replace the plug or the seal. Never over-tighten the plug to compensate for a bad seal, as this can easily strip the aluminum threads on the pan.

How to change the oil

Servicing the 2023 Sierra 2500HD is fairly straightforward thanks to its high ground clearance.

1. Prepare the Truck: Park on a level surface, set the parking brake, and open the hood. Remove the oil fill cap to help the oil drain faster.
2. Drain the Oil: Position a high-capacity drain pan (must hold at least 3-4 gallons) under the oil pan. Remove the drain plug using a 15mm wrench or socket. Let it drain completely.
3. Replace the Filter: Move the drain pan under the oil filter. Use an oil filter wrench to loosen and remove the old filter. Lubricate the new filter's rubber gasket with a dab of fresh oil, then spin it on by hand until it makes contact, and give it another 3/4 to 1 full turn. Do not use a wrench to tighten it!
4. Reinstall the Drain Plug: Install the drain plug with a good seal and torque to 18 lb-ft.
5. Refill and Check: Fill the engine with the correct amount and type of oil (8.0 qts for gas, 10.0 qts for diesel). Replace the cap, start the engine for 30 seconds to circulate the oil, and check for leaks underneath.
6. Verify Level and Reset: Turn off the engine, wait 5 minutes, and check the dipstick to ensure the level is correct. Finally, reset the Oil Life Monitor via the steering wheel controls.

Common issues / tips

For the current generation of heavy-duty Sierras, keep the following in mind during your service:

• Massive Fluid Volumes: Make sure your drain pan is large enough! 10 quarts of diesel oil will overflow a standard DIY automotive drain pan in seconds.
• Diesel Soot: Duramax diesel oil turns black almost immediately after an oil change. Do not be alarmed if the fresh oil looks dirty after the first startup; this is entirely normal for modern diesel engines.
• Fuel Filter Reminder: For the 6.6L Duramax, it is highly recommended to change the fuel filters every time, or at least every other time, you change the engine oil.

Need an oil change? Find a trusted shop on Repairius.