GMC Sierra 2500 HD & 3500 HD Oil Type and Capacity (2010–2026)

Whether your Sierra HD runs the gas V8 or the Duramax diesel, using the correct oil type, viscosity, and capacity is the single most important thing you can do to protect a heavy-duty engine that works hard around Waxahachie and Ellis County. GMC revised these trucks several times between 2010 and 2026, so the right specification depends on your model year and engine. Below is a complete, engine-by-engine reference for the Sierra 2500 HD and 3500 HD, followed by service intervals and answers to common oil questions.

Sierra HD Oil Specifications at a Glance

This quick-reference table covers every engine offered in the GMC Sierra 2500 HD and 3500 HD from 2010 through 2026. Oil capacities are shown with a filter change; always confirm the final level on the dipstick after running the engine. Detailed notes for each engine follow below.

6.6L Duramax Diesel Oil Specifications

The Duramax capacity is identical for the 2500 HD and 3500 HD—the payload difference between the two trucks does not change the engine’s lubrication system. GMC calls for a heavy-duty diesel oil, with the lighter cold-weather grade reserved for sub-zero temperatures where it flows better on cold starts. This matters more on a diesel than a gas engine: underfilling even slightly starves the turbocharger and high-pressure fuel components, so the correct fill and a fresh filter every time are not optional. Use the table above to confirm the grade and standard for your generation.

Filter choice tracks the generation and model year rather than the truck’s payload badge, as the table above shows. The two earliest diesels and the first L5P trucks share the same long-running Duramax filter, while the current-generation engine moved to a redesigned filter as the platform was updated—first the PF26 with the 2020 redesign, then the PF63 from 2023 onward. One thing the table can’t show: draining without swapping the filter leaves roughly three-quarters of a quart of dirty oil trapped in the housing, so always replace the filter and refill completely.

6.0L and 6.6L Gas V8 Oil Specifications

Gas-powered Sierra HD trucks used two different engines over this span, which is why matching your model year matters. The smaller Vortec V8 was the standard gas engine through the 2010s until GMC replaced it with a larger V8 for the 2020 redesign; both call for the same viscosity, but they hold different amounts, as the table shows. On the older engine, a lighter 0W-30 grade is also permitted in extreme cold per the owner’s manual for easier cold starting. Worth noting for scope: the 8.1L Vortec big-block was discontinued after 2007, so it does not apply to any truck in the 2010–2026 range.

A common mix-up is applying 1500-series specifications to these HD trucks. The 5.3L and 6.2L V8s found in half-ton Sierra 1500 models use 0W-20, but the HD’s 6.0L and 6.6L gas V8s are 5W-30 engines. Always match the oil to the engine under your hood, not the badge on the tailgate.

Oil Filter Cross-Reference by Engine

Using the correct ACDelco filter keeps oil pressure and filtration within GMC’s engineering targets. This table consolidates the filter part numbers for every Sierra HD engine in the 2010–2026 range so you can match the right filter to your truck at a glance.

Oil Life Monitor & Change Intervals

Both the gas and diesel Sierra HD use GMC’s Oil Life Monitoring System, which calculates remaining oil life from engine temperature, load, idle time, and driving conditions rather than mileage alone. The practical takeaway is that how you use the truck sets the schedule: a truck that regularly tows near its limits, idles for long periods, or works in dust and extreme heat—common through a Texas summer—wears its oil faster than the monitor’s normal-service assumptions, so the shorter severe-duty interval below is the safer default for a working truck. Whichever applies, reset the monitor after every change.

The information in this article is general guidance and does not constitute a specific diagnostic or repair recommendation for any individual vehicle. Repair and maintenance decisions should be made in consultation with a certified technician based on the specific condition of your vehicle.

Frequently Asked Questions

How much oil does a 6.6L Duramax take in the Sierra 2500 HD or 3500 HD?

Ten quarts with a filter change, and the amount is the same for the 2500 HD and 3500 HD across every Duramax generation from 2010 to 2026.

What oil filter does my Sierra HD use?

It depends on the engine and year. Duramax LMM and LML diesels (2010–2016) use the ACDelco PF2232, as do the earliest L5P diesels (2017–2019); the L5P then moved to the PF26 for 2020–2022 and to the PF63 from 2023 onward. The 6.6L L8T gas V8 (2020–2026) uses the PF63, while the earlier 6.0L gas V8 used the PF48/PF46 and later the PF63.

Can I use 15W-40, or do I need 5W-40 in my Duramax?

GMC specifies 15W-40 for temperatures above 0°F and a 5W-40 full synthetic below 0°F. Both must meet the API CK-4 diesel oil standard (API CJ-4 on older trucks).

Does my gas Sierra HD use the same 0W-20 as a Sierra 1500?

No. The half-ton Sierra 1500’s 5.3L and 6.2L engines use 0W-20, but the HD’s 6.0L and 6.6L gas V8s use a dexos1 5W-30.

Service Your Sierra HD at Legacy GMC of Waxahachie

Our GMC-trained service technicians know these engines and stock the correct genuine ACDelco oil and filters for every Sierra HD, gas or diesel. Whether you are due for a routine change or want your oil-life interval matched to how you actually use your truck, our team near Waxahachie can help. For more maintenance guidance, browse our service and parts tips, or visit our service department to get started.

Oil capacities, viscosity recommendations, and filter part numbers vary by model year, engine, and configuration. Always confirm the correct specification for your specific vehicle against your owner’s manual or with our service department before servicing. Verify the oil level on the dipstick after running the engine.