Fluid · Coolant
Coolant
for 1981 Chevrolet K20 454ci V8 · 4WD
Fluid Type
Ethylene glycol green 50/50
Spec: GM 1899-M or equivalent
Capacity
24qt
22.7 L
Drain & Refill
21 qt
19.87 L
Change Interval
24,000 mi
38,616 km
Data quality
Book-style estimate
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Notes
Total capacity includes heater and block. Use traditional green coolant, not Dexcool. 454 has highest capacity