Fluid · Coolant
Coolant
for 2018 Cadillac CT6 3.6L V6 · RWD
Fluid Type
Dex-Cool orange extended-life 50/50
Spec: GM 3420M / DEX-COOL
Capacity
11.1qt
10.5 L
Drain & Refill
10 qt
9.46 L
Change Interval
150,000 mi
241,350 km
Data quality
Book-style estimate
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Notes
First change at 150k miles, then every 5 years/150k
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