Fluid · Coolant
Coolant
for 2021 GMC Sierra 1500 3.0L I6 Duramax Diesel · RWD
Fluid Type
Dex-Cool 50/50
Spec: GM6277M or DEX-COOL
Capacity
17qt
16.08 L
Drain & Refill
14 qt
13.24 L
Change Interval
150,000 mi
241,350 km
Data quality
Book-style estimate
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Notes
Extended life orange coolant. First change at 150k miles, then every 5 years/150k miles. Includes engine and auxiliary systems.
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