CAR SPEC SHEET

2021 GMC Sierra 1500 Fuel tank size

2024 GMC Sierra 1500, representative photo
Shown: a 2024 GMC Sierra 1500 (same generation). Photo: Mr.choppers, CC BY-SA 3.0
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Depends on your version. Choose yours, or compare them here.

  • Standard and Short Box (except 2WD Diesel) 24.0 gal
  • Standard and Short Box (2WD Diesel) 22.0 gal
  • Long Box 28.3 gal

2021 GMC Sierra 1500 Owner's Manual, PDF page 439

Standard and Short Box (except 2WD Diesel) 90.8 L 24.0 galOpen the manual at this page ↗Added Oct 15, 2026
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Fuel tank size · Standard and Short Box (except 2WD Diesel) · PDF page 439

Standard and Short Box (except 2WD Diesel) 90.8 L 24.0 gal

Fuel tank size · Standard and Short Box (2WD Diesel) · PDF page 439

Standard and Short Box (2WD Diesel) 83.3 L 22.0 gal

Fuel tank size · Long Box · PDF page 439

Long Box 107.1 L 28.3 gal

2024 GMC Sierra 1500, representative photo
Shown: a 2024 GMC Sierra 1500 (same generation). Photo: Mr.choppers, CC BY-SA 3.0
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All versions

3 values
Applies toValueManual saysPage
Standard and Short Box (except 2WD Diesel) 24.0 gal “Standard and Short Box (except 2WD Diesel) 90.8 L 24.0 gal” PDF page 439 ↗
Standard and Short Box (2WD Diesel) 22.0 gal “Standard and Short Box (2WD Diesel) 83.3 L 22.0 gal” PDF page 439 ↗
Long Box 28.3 gal “Long Box 107.1 L 28.3 gal” PDF page 439 ↗

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