Fluid · Engine Oil
Engine Oil
for 1991 GMC Suburban 7.4L V8 · 4WD
Fluid Type
5W-30 or 10W-30 conventional
Spec: API SG
Capacity
6qt
5.68 L
Drain & Refill
6 qt
5.68 L
Change Interval
3,000 mi
4,827 km
Data quality
Book-style estimate
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Notes
With filter. 454 big block requires extra quart vs 350. Can use modern API SN/SP oils which are backwards compatible
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