Fluid · Coolant
Coolant
for 2026 Chevrolet Suburban 3.0L I6 Duramax · 4WD
Fluid Type
Dexcool 50/50 orange extended-life
Spec: GM DEX-COOL
Capacity
16.5qt
15.61 L
Drain & Refill
14 qt
13.24 L
Change Interval
150,000 mi
241,350 km
Notes
Diesel engine has additional cooling capacity, initial fill 150k miles then every 5 years/50k miles
As an Amazon Associate, OLP earns from qualifying purchases — how we link. This never changes the specs we publish.