Manufacturer-backed comparison · Exact vehicle codes
Gmc Sierra 1500 Fuel Tank Capacity by Chassis Code
How large is the fuel tank on each chassis? Compare actual published manufacturer references for 4 exact Gmc Sierra 1500 chassis codes. Values can differ across drivetrain, trim and production period.
4documented chassis
2distinct published answers
1source documents
2026-11-03latest evidence review
Before applying a specification
View all Gmc Sierra 1500 chassis →Confirm the engineering configuration
Fuel tank capacity can change by drivetrain, hybrid system, grade and model revision. A model badge alone is not sufficient to apply a fuel capacity.
Year ranges here describe the cited chassis coverage, not every option sold under the same model name worldwide. The actual service manual and fitted equipment take precedence.
Source-linked answers
Fuel Tank Capacity: chassis comparison
Open the original exact-code answer to see the manufacturer reference and full caveat.
Documented differences
Which codes share an answer?
Grouped by exact published text. Similar wording is not treated as proof of identical equipment.
Reviewable evidence
Source scope and important caveats
Gmc Sierra 1500 Sierra 1500 L3B MY2025 US — Fuel tank capacity ↗
Published answer: Standard/short box: 90.8 L (24.0 US gal). Long box: 107.1 L (28.3 US gal). Approximate fuel tank capacities; identify the box and drivetrain before selecting a value.
Standard/short box: 90.8 L (24.0 US gal). Long box: 107.1 L (28.3 US gal). Approximate fuel tank capacities; identify the box and drivetrain before selecting a value. Verified against the exact US MY2025 manufacturer manual.
Applicability: Sierra 1500 L3B MY2025 US. Conditional decision table, not a universal tank capacity. Box length and drivetrain are not inferred from engine RPO.
General Motors manufacturer reference · General Motors · Manufacturer reference ↗
Gmc Sierra 1500 Sierra 1500 L84 MY2025 US — Fuel tank capacity ↗
Published answer: Standard/short box: 90.8 L (24.0 US gal). Long box: 107.1 L (28.3 US gal). Approximate fuel tank capacities; identify the box and drivetrain before selecting a value.
Standard/short box: 90.8 L (24.0 US gal). Long box: 107.1 L (28.3 US gal). Approximate fuel tank capacities; identify the box and drivetrain before selecting a value. Verified against the exact US MY2025 manufacturer manual.
Applicability: Sierra 1500 L84 MY2025 US. Conditional decision table, not a universal tank capacity. Box length and drivetrain are not inferred from engine RPO.
General Motors manufacturer reference · General Motors · Manufacturer reference ↗
Gmc Sierra 1500 Sierra 1500 L87 MY2025 US — Fuel tank capacity ↗
Published answer: Standard/short box: 90.8 L (24.0 US gal). Long box: 107.1 L (28.3 US gal). Approximate fuel tank capacities; identify the box and drivetrain before selecting a value.
Standard/short box: 90.8 L (24.0 US gal). Long box: 107.1 L (28.3 US gal). Approximate fuel tank capacities; identify the box and drivetrain before selecting a value. Verified against the exact US MY2025 manufacturer manual.
Applicability: Sierra 1500 L87 MY2025 US. Conditional decision table, not a universal tank capacity. Box length and drivetrain are not inferred from engine RPO.
General Motors manufacturer reference · General Motors · Manufacturer reference ↗
Gmc Sierra 1500 Sierra 1500 LZ0 MY2025 US — Fuel tank capacity ↗
Published answer: Standard/short box: 83.3 L (22.0 US gal) for 2WD diesel; 90.8 L (24.0 US gal) for other drive layouts. Long box: 107.1 L (28.3 US gal). Approximate fuel tank capacities; identify the box and drivetrain before selecting a value.
Standard/short box: 83.3 L (22.0 US gal) for 2WD diesel; 90.8 L (24.0 US gal) for other drive layouts. Long box: 107.1 L (28.3 US gal). Approximate fuel tank capacities; identify the box and drivetrain before selecting a value. Verified against the exact US MY2025 manufacturer manual.
Applicability: Sierra 1500 LZ0 MY2025 US. Conditional decision table, not a universal tank capacity. Box length and drivetrain are not inferred from engine RPO.
General Motors manufacturer reference · General Motors · Manufacturer reference ↗