Fluid · Coolant
Coolant
for 1978 Pontiac LeMans 403ci V8 · RWD
Fluid Type
Ethylene glycol green 50/50
Spec: GM 1899-M or equivalent
Capacity
20qt
18.92 L
Drain & Refill
20 qt
18.92 L
Change Interval
24,000 mi
38,616 km
Data quality
Book-style estimate
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Notes
System capacity including heater. Larger capacity for 403 engine. Use conventional green coolant, not Dexcool in 1978