Fluid · Coolant
Coolant
for 2020 GMC Sierra 2500HD 6.6L V8 Duramax Diesel · 4WD
Fluid Type
Dex-Cool 50/50 premix
Spec: GM 6277M
Capacity
30qt
28.38 L
Drain & Refill
27 qt
25.54 L
Change Interval
150,000 mi
241,350 km
Data quality
Book-style estimate
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Notes
Extended life orange coolant. Includes engine and supplemental cooler systems
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