Fluid · Coolant
Coolant
for 2018 GMC Sierra 3500HD 6.6L V8 Duramax Diesel · 4WD
Fluid Type
Dexcool 50/50 orange
Spec: GM 6277M or DEX-COOL
Capacity
27.5qt
26.01 L
Drain & Refill
23 qt
21.76 L
Change Interval
150,000 mi
241,350 km
Notes
L5P Duramax cooling system. First change at 150k miles, then every 5 years/150k
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