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Checked oil specs by engine

2021 GMC Sierra oil capacity, type & filter

Multiple engine options are listed for the 2021 GMC Sierra. Select your engine below before buying oil or a filter.

2021 GMC Sierra oil specs by engine
Engine Capacity Oil Type Filter
2.7L 4-Cyl Turbo 6 qt 5W-30 WIX 51032
3.0L 6-Cyl Turbo Diesel 7 qt 0W-20 WIX 51032
4.3L V6 6 qt 5W-30 AMSOIL EA15K01
5.3L V8 8 qt 0W-20 AMSOIL EA15K01
6.2L V8 8 qt 0W-20 AMSOIL EA15K01
6.6L V8 Diesel — — —

Match one of 6 checked engine options before buying oil or a filter. Also check 2021 GMC Sierra 1500 .

2.7L 4-Cyl Turbo
Capacity 6 qt Verified fit Buy at least 6 qt total; listed capacity is 6 qt (With filter).
Oil type 5W-30 OEM oil approval is not source-backed on this page; confirm the bottle or owner's manual before checkout. Verified fit
Oil Filters
WIX Shown first 51032 Search 51032 WIX 51036 Search 51036 WIX 51040 Search 51040 WIX 51042 Search 51042

WIX 51032 is copied into the checkout checklist below. Other listed filters are source-backed alternatives.

i Based on 1 checked source: AMSOIL Lookup. Additional cross-check is still pending: another filter catalog cross-check. Use it as a reference, then confirm the exact filter part number at checkout. See how we verify. Learn how we verify fitment
3.0L 6-Cyl Turbo Diesel
Capacity 7 qt i Capacity condition is not listed in the checked data, so confirm whether the service-fill amount includes a new filter before adding oil. See how we verify. Learn how we verify fitment Verified fit Buy at least 7 qt total; listed capacity is 7 qt.
Oil type 0W-20 OEM oil approval is not source-backed on this page; confirm the bottle or owner's manual before checkout. Verified fit
Oil Filters
WIX Shown first 51032 Search 51032 WIX 51036 Search 51036 WIX 51040 Search 51040 WIX 51042 Search 51042

WIX 51032 is copied into the checkout checklist below. Other listed filters are source-backed alternatives.

i Based on 1 checked source: AMSOIL Lookup. Additional cross-check is still pending: another filter catalog cross-check. Use it as a reference, then confirm the exact filter part number at checkout. See how we verify. Learn how we verify fitment
4.3L V6
Capacity 6 qt i Capacity condition is not listed in the checked data, so confirm whether the service-fill amount includes a new filter before adding oil. See how we verify. Learn how we verify fitment Verified fit Buy at least 6 qt total; listed capacity is 6 qt.
Oil type 5W-30 OEM oil approval is not source-backed on this page; confirm the bottle or owner's manual before checkout. Verified fit
Oil Filters
AMSOIL Shown first EA15K01 Search EA15K01 AMSOIL EA15K02 Search EA15K02 AMSOIL EA15K03 Search EA15K03 AMSOIL EA15K04 Search EA15K04

AMSOIL EA15K01 is copied into the checkout checklist below. Other listed filters are source-backed alternatives.

i Based on 1 checked source: AMSOIL Lookup. Additional cross-check is still pending: another filter catalog cross-check. Use it as a reference, then confirm the exact filter part number at checkout. See how we verify. Learn how we verify fitment
5.3L V8
Capacity 8 qt i Capacity condition is not listed in the checked data, so confirm whether the service-fill amount includes a new filter before adding oil. See how we verify. Learn how we verify fitment Verified fit Buy at least 8 qt total; listed capacity is 8 qt.
Oil type 0W-20 OEM oil approval is not source-backed on this page; confirm the bottle or owner's manual before checkout. Verified fit
Oil Filters
AMSOIL Shown first EA15K01 Search EA15K01 AMSOIL EA15K02 Search EA15K02 AMSOIL EA15K03 Search EA15K03 AMSOIL EA15K04 Search EA15K04

AMSOIL EA15K01 is copied into the checkout checklist below. Other listed filters are source-backed alternatives.

i Based on 1 checked source: AMSOIL Lookup. Additional cross-check is still pending: another filter catalog cross-check. Use it as a reference, then confirm the exact filter part number at checkout. See how we verify. Learn how we verify fitment
6.2L V8
Capacity 8 qt i Capacity condition is not listed in the checked data, so confirm whether the service-fill amount includes a new filter before adding oil. See how we verify. Learn how we verify fitment Verified fit Buy at least 8 qt total; listed capacity is 8 qt.
Oil type 0W-20 OEM oil approval is not source-backed on this page; confirm the bottle or owner's manual before checkout. Verified fit
Oil Filters
AMSOIL Shown first EA15K01 Search EA15K01 AMSOIL EA15K02 Search EA15K02 AMSOIL EA15K03 Search EA15K03 AMSOIL EA15K04 Search EA15K04

AMSOIL EA15K01 is copied into the checkout checklist below. Other listed filters are source-backed alternatives.

i Based on 1 checked source: AMSOIL Lookup. Additional cross-check is still pending: another filter catalog cross-check. Use it as a reference, then confirm the exact filter part number at checkout. See how we verify. Learn how we verify fitment
6.6L V8 Diesel
Capacity Not confirmed Confirm the service-fill amount for this engine before adding oil.
Oil type Not confirmed Confirm the viscosity grade for this engine before checkout.
Oil Filters
No checked filter listed Use a retailer fitment tool to confirm the exact part number before ordering.
Specs not yet confirmed for this engine. Search Amazon for 2021 GMC Sierra 6.6L V8 Diesel oil →

3 sources checked Last checked: 2026-06-23 How we verify →

Where to Buy View Data Sources
Buy oil & filters:
Walmart → AutoZone → Amazon → O'Reilly →
Full synthetic options for 5W-30
Mobil 1 Extended Performance 5W-30 → Castrol Edge 5W-30 → Pennzoil Platinum 5W-30 →

Search paths only — confirm your OEM viscosity spec and quantity before checkout.

Full synthetic options for 0W-20
Mobil 1 Extended Performance 0W-20 → Castrol Edge 0W-20 → Pennzoil Platinum 0W-20 →

Search paths only — confirm your OEM viscosity spec and quantity before checkout.

2021 GMC Sierra oil specs: capacity conditions and filter notes

Which engine applies?

Check the door jamb sticker, owner's manual, or displacement badge on the engine cover. Match it to the engine options listed above before buying oil or a filter.

Filter part numbers

All listed filter part numbers are compatible alternatives for your vehicle. Choose any one brand, then confirm the exact part number at checkout.

Capacity condition

With filter means the volume includes a new filter. Service fill is the typical drain-and-fill amount. Dry fill is for a fresh empty engine only.

Filter status

Filter fitment has not been fully verified for every engine listed. Confirm the part number with the retailer before ordering.

Verify before checkout

Retailer fitment tools may use different data. Confirm oil capacity, viscosity, and filter part number before ordering.

Source coverage for the 2021 GMC Sierra

Capacity sources

Supported by Pennzoil OATS, AMSOIL Lookup, and Castrol (Olyslager).

Oil type sources

Supported by Pennzoil OATS, AMSOIL Lookup, and Castrol (Olyslager).

Filter sources

Supported by AMSOIL Lookup.

Source coverage

3 checked source rows for the 2021 GMC Sierra.

Before ordering for this 2021 GMC Sierra

Checkout verification checklist
2.7L 4-Cyl Turbo Verified fit Buy →
Capacity
6 qt (With filter)
Oil type
5W-30
Interval
12 mo
Filter
WIX 51032
3.0L 6-Cyl Turbo Diesel Verified fit Buy →
Capacity
7 qt
Oil type
0W-20
Interval
12 mo
Filter
WIX 51032
4.3L V6 Verified fit Buy →
Capacity
6 qt
Oil type
5W-30
Interval
12 mo
Filter
AMSOIL EA15K01
5.3L V8 Verified fit Buy →
Capacity
8 qt
Oil type
0W-20
Interval
12 mo
Filter
AMSOIL EA15K01
6.2L V8 Verified fit Buy →
Capacity
8 qt
Oil type
0W-20
Filter
AMSOIL EA15K01
6.6L V8 Diesel
Capacity
Unverified
Oil type
Unverified
Interval
12 mo
Filter
Unverified

Source check: Last checked 2026-06-23 from Pennzoil OATS, AMSOIL Lookup, and Castrol (Olyslager).

GMC Sierra oil specs by year

This table includes checked GMC Sierra model years available in our database.

Year Capacity Oil type Filter
2024 8 qt (multiple engines) 0W-20 AMSOIL EA15K01
2023 6 qt (multiple engines) 5W-30 WIX 51032
2022 6 qt (multiple engines) 5W-30 WIX 51032
2021 Current page 6 qt (multiple engines) 5W-30 WIX 51032
2020 6 qt (multiple engines) 5W-30 WIX 51032
2019 8 qt (multiple engines) 0W-20 AMSOIL EA15K01
2018 6 qt (multiple engines) 5W-30 AMSOIL EA15K01
2017 6 qt (multiple engines) 5W-30 AMSOIL EA15K01
2016 6 qt (multiple engines) 5W-30 AMSOIL EA15K01
2015 6 qt (multiple engines) 5W-30 AMSOIL EA15K01
2014 6 qt (multiple engines) 5W-30 WIX 51027
2013 6 qt (multiple engines) 5W-30 WIX 51032
2012 4.5 qt (multiple engines) 5W-30 AMSOIL EA15K29
2011 4.5 qt (multiple engines) 5W-30 AMSOIL EA15K29
2010 4.5 qt (multiple engines) 10W-30 AMSOIL EA15K29
2009 6 qt (multiple engines) 5W-30 AMSOIL EA15K50
2008 4.5 qt (multiple engines) 5W-30 AMSOIL EA15K29
2007 4.5 qt (multiple engines) 5W-30 AMSOIL EA15K29

How we verified 2021 GMC Sierra oil data

How we verify fitment

Checked fitment data. Last checked: 2026-06-23.

This page checked 3 sources for the 2021 GMC Sierra. The table lists which checked source contributed capacity, oil type, or filter evidence.

We checked leading oil brands and aftermarket filter catalogs so you don't have to.

Confidence
Cross-check pending i Some oil fields are based on checked source data but still need stronger cross-check evidence. Review area: 2.7L 4-Cyl Turbo oil filter, 3.0L 6-Cyl Turbo Diesel oil filter, 4.3L V6 oil filter, 5.3L V8 oil filter, and 6.2L V8 oil filter. Use the listed values as references and confirm the exact engine before ordering or adding oil. See how we verify. Learn how we verify fitment
Sources checked
3
Last checked
2026-06-23
Field-level source support
  • Capacity: Pennzoil OATS, AMSOIL Lookup, and Castrol (Olyslager)
  • Oil type: Pennzoil OATS, AMSOIL Lookup, and Castrol (Olyslager)
  • Filter: AMSOIL Lookup
  • Change interval: Pennzoil OATS, AMSOIL Lookup, and Castrol (Olyslager)
Source Supports Checked Link
Pennzoil OATS Capacity, Oil type 2026-06-23 Visit brand site
AMSOIL Lookup Capacity, Filter, Oil type 2026-06-23 Visit brand site
Castrol (Olyslager) Capacity, Oil type 2026-06-23 Visit brand site

2021 GMC Sierra maintenance checklist

One part checked. Look up the rest while you're here.

Where to buy

These are retailer search paths for your vehicle. The specs above are checked — use the retailer's vehicle selector at checkout to confirm before ordering.

This section may include affiliate or sponsored retailer links. They are purchase paths, not fitment evidence.

Look up another vehicle

Find checked oil capacity, type, and filter data by exact year, make, and model.

Other 2021 GMC Sierra lookups: Cabin air filter · Engine air filter · Wiper blade size