Fluid · Coolant
Coolant
for 2021 Chevrolet Silverado 2500HD 6.6L V8 Duramax L5P · 4WD
Fluid Type
Dex-Cool 50/50 orange
Spec: GM6277M or equivalent OAT
Capacity
30qt
28.38 L
Drain & Refill
27 qt
25.54 L
Change Interval
150,000 mi
241,350 km
Notes
Duramax diesel cooling system. Total capacity approximately 30 quarts. First change at 150k miles, then every 5 years/150k.
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