Fluid · Coolant
Coolant
for 2021 Chevrolet Silverado 2500HD 6.6L V8 L8T Gas · 4WD
Fluid Type
Dex-Cool 50/50 orange
Spec: GM6277M or equivalent OAT
Capacity
27qt
25.54 L
Drain & Refill
24 qt
22.7 L
Change Interval
150,000 mi
241,350 km
Notes
Total system capacity approximately 27 quarts. DEX-COOL long-life OAT coolant. First change at 150k miles, then every 5 years/150k.
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