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What Oil Does a GMC Sierra Take? Exact Type, Weight & Capacity

What oil does a GMC Sierra take depends on the engine, but the short version is this: most modern Sierras run 0W-20 full synthetic meeting GM dexos1 Gen 3, while older trucks use 5W-30. Here is the exact spec, quart capacity, and change interval for every engine.

Spec: 0W-20 or 5W-30 dexos1 Gen 3 required 6 to 10 quarts Don't mix up weights
The quick answer Most GMC Sierra 1500 gas engines built since the 2014 redesign take 0W-20 full synthetic meeting the GM dexos1 Gen 3 spec. Older Sierras (roughly 2007 to 2013) and some V6s use 5W-30. Diesels use dexos D oil. The single most reliable source is the cap on top of your oil-fill spout, which is stamped with the exact weight.

What oil does a GMC Sierra take is one of those questions where the badge on the tailgate is not enough. The weight printed on that cap and in your owner's manual overrides anything you read online, including this page. GM has shifted oil specs across model years, so a 2011 Sierra and a 2022 Sierra do not take the same oil. Below is the full breakdown by engine and year.

⚡ Oil type and capacity by engine

Here is the exact oil weight, dexos spec, and capacity for the most common GMC Sierra engines. Capacities include the filter and are rounded to the standard fill listed by GM.

EngineYearsOil WeightSpecCapacity
4.3L V62014–20190W-20dexos1 Gen 2/36.0 qt
2.7L Turbo I42019–present0W-20dexos1 Gen 36.0 qt
5.3L V82014–present0W-20dexos1 Gen 38.0 qt
6.2L V82014–present0W-20dexos1 Gen 38.0 qt
3.0L Duramax I6 Diesel2020–present0W-20dexos D7.5 qt
4.8L / 5.3L / 6.0L V82007–20135W-30dexos16.0–7.0 qt
6.6L Duramax V8 (HD)2017–present15W-40 or 5W-40dexos D / Allison10.0 qt
6.6L L8T Gas V8 (HD)2020–present0W-20dexos1 Gen 38.0 qt

Note: 6.6L Duramax diesel oil weight varies by climate. GM lists 15W-40 for most conditions and 5W-40 or 0W-40 full synthetic for cold-weather starting below 0°F. Always confirm against your owner's manual.

🔧 Why the weight matters more than you think

The shift from 5W-30 to 0W-20 was not GM chasing a fad. The newer EcoTec3 and high-output engines use piston-cooling oil jets, low-friction bearings, and variable valve timing that are calibrated around a thinner oil. Pour 5W-30 into an engine that wants 0W-20 and you can see slower VVT response, a small fuel-economy hit, and on cold mornings, delayed oil pressure to the top end.

Going the other way is worse. If you put 0W-20 in an older 5.3L or 6.0L that was designed for 5W-30, the thinner film can increase wear under towing loads and high heat. When in doubt, the rule is simple: use exactly what the cap and manual say, not what the parts-store clerk eyeballs.

What dexos actually means

dexos is GM's own oil license. dexos1 covers gas engines and dexos D covers the 3.0L diesel. The current gas standard is dexos1 Gen 3, which improved protection against low-speed pre-ignition (LSPI), a knock event that can crack pistons on turbo and direct-injected engines. Look for the printed dexos logo and a license number on the bottle. Generic "meets GM specs" wording without the logo is a red flag.

Not sure which engine you have or seeing an oil light? Get a ranked report of likely causes, the right oil spec, and parts for your exact year and trim.
Run AI Diagnosis →

⚠️ Common mistakes Sierra owners make

  • Trusting the capacity number alone. The 8.0 quart figure for the 5.3L and 6.2L is the full fill. After a normal change, add about 7.5 quarts, start the engine, let it settle, then top to the dipstick mark. Overfilling foams the oil and can throw off the VVT.
  • Using non-dexos oil. Cheaper conventional oil without the dexos license can accelerate timing-chain stretch, a known weak point on the 5.3L AFM engines. If you are chasing a check engine light, see our guide on P0008 engine position correlation, which is often oil-related.
  • Ignoring the AFM/DFM oil consumption pattern. Many 5.3L trucks burn oil through the Active Fuel Management lifters and PCV system. If you are adding a quart every 1,500 miles, read up on that burning oil smell before it becomes a lifter failure.
  • Skipping intervals because the dash didn't ask. The GM Oil Life System estimates based on driving, but short trips, idling, and towing degrade oil faster than the algorithm assumes. Change at least once a year regardless.
  • Wrong filter. Match the AC Delco part for your engine. A filter with the wrong bypass valve can starve the top end on cold starts.

🧮 How to confirm your exact spec in 30 seconds

  1. Open the hood and read the oil-fill cap. It is stamped with the weight, usually 0W-20 or 5W-30. This is the factory-correct answer for your truck.
  2. Cross-check the owner's manual. The maintenance section lists weight, dexos spec, and capacity for your exact engine code.
  3. Find your engine code. The 8th character of your VIN identifies the engine. That tells you whether you have the 5.3L, 6.2L, 2.7L turbo, or a Duramax.
  4. Match the dexos license. Confirm the bottle shows dexos1 Gen 3 (gas) or dexos D (3.0L diesel) with a printed license number.
  5. If something feels off, like low oil pressure, ticking, or rapid consumption, run a quick AI diagnosis before your next change to rule out a deeper issue.

If a shop quoted you for an oil change or a related repair and the price feels high, drop the figure into our quote checker to see what a fair price looks like for your area and vehicle.

📝 Change interval cheat sheet

Driving TypeRecommended IntervalNotes
Normal (highway, light loads)7,500 mi or per Oil Life SystemFull synthetic, dexos1 Gen 3
Mixed / suburban5,000–6,000 miWatch the dash monitor
Severe (towing, short trips, heat)3,000–5,000 miOil degrades faster under load
Diesel (3.0L / 6.6L)Per monitor, at least 1x/yearUse correct dexos D / diesel oil

❓ Frequently asked questions

What oil does a GMC Sierra 1500 take?
Most modern Sierra 1500 gas engines take 0W-20 full synthetic that meets the GM dexos1 Gen 3 spec. The 5.3L and 6.2L V8s from 2014 onward use 0W-20, while older 4.8L, 5.3L, and 6.0L engines from roughly 2007 to 2013 called for 5W-30. The 3.0L Duramax diesel uses 0W-20 dexos D, and the 2.7L turbo four uses 0W-20 dexos1.
How much oil does a GMC Sierra take?
Capacity depends on engine. The 5.3L V8 holds 8 quarts, the 6.2L V8 holds 8 quarts, the 2.7L turbo holds 6 quarts, the 3.0L Duramax diesel holds 7.5 quarts, and the 6.6L Duramax in heavy-duty trucks holds 10 quarts. Always fill to the dipstick mark, not the listed capacity alone.
Can I use 5W-30 instead of 0W-20 in my Sierra?
No, not if your engine specifies 0W-20. The piston-cooling oil jets, variable valve timing, and fuel-economy calibration on newer Sierras are tuned for the thinner 0W-20. Using 5W-30 when 0W-20 is specified can affect VVT operation and fuel economy and may void warranty coverage. Use the weight printed on your oil-fill cap or in the owner's manual.
How often should I change the oil in a GMC Sierra?
Follow the GM Oil Life System on the dash, which typically calls for a change between 5,000 and 7,500 miles for gas engines depending on driving conditions. The Duramax diesels run on a similar monitor but should be changed at least once a year. Severe-duty towing or short-trip driving shortens the interval.
Does my Sierra need dexos oil?
Yes. GM requires dexos1 Gen 3 licensed oil for gas engines and dexos D for the 3.0L Duramax diesel. Look for the dexos logo and license number on the bottle. Using non-dexos oil can affect warranty coverage and timing-chain longevity.

✅ TL;DR

  • Modern Sierra 1500 gas engines (5.3L, 6.2L, 2.7L turbo): 0W-20, dexos1 Gen 3.
  • Older Sierras 2007 to 2013 (4.8L, 5.3L, 6.0L): 5W-30.
  • 3.0L Duramax diesel: 0W-20 dexos D, 7.5 qt. 6.6L Duramax HD: 15W-40 (or 5W-40 cold), 10 qt.
  • Capacities: 2.7L = 6 qt, 5.3L/6.2L = 8 qt.
  • The oil-fill cap is the final word. Change every 5,000 to 7,500 miles per the Oil Life System.