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1990 GMC SIERRA 2500
6.5L V8 Diesel•4WD•AUTOMATIC•diesel•turbo
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Repairs0Labor522Torque4488Fluid10DTC0Battery1Maintenance0Recalls0
Fluid · Engine Oil

Engine Oil

for 1990 GMC Sierra 2500 6.5L V8 Diesel · 4WD
Fluid Type
15W-40 diesel engine oil
Spec: API CF or higher
Capacity
7qt
6.62 L
Drain & Refill
7 qt
6.62 L
Change Interval
3,000 mi
4,827 km

Notes

6.2L naturally aspirated diesel (note: 6.5L designation in key appears incorrect for 1990; actual 6.2L). WITH filter. Use diesel-rated oil

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Other fluid systems on this vehicle

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🔧 Database maintained under the daily editorial review of Chris Hackleman · Master Technician · 20+ years and Jeff Moore · Master Mechanic · 20+ years. Spot an error? Use the Help link above — a human reads every report.
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