Fluid · Coolant
Coolant
for 2023 Chevrolet Suburban 3.0L I6 Duramax · 4WD
Fluid Type
Dexcool 50/50 premix
Spec: GM OAT extended-life coolant
Capacity
20qt
18.92 L
Drain & Refill
18 qt
17.03 L
Change Interval
150,000 mi
241,350 km
Data quality
Book-style estimate
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Notes
Diesel engine has larger cooling system capacity; initial fill 150k miles, then 100k intervals
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