C 3500 Truck 2WD V8-6.0L VIN U (2001)
Coolant: Fluid Type Specifications
Coolant
Use a 50/50 mixture of clean, drinkable water (preferably distilled) and GM Goodwrench DEX-COOL or Havoline DEX-COOL Coolant.
Notice Mixing conventional green (ethylene glycol) coolant with DEX-COOL (silicate-free coolant) will degrade the service interval from
5yrs./150,000 miles to 2yrs./30,000 miles (50,000 km) if left in the contaminated condition. If contamination occurs, the cooling system must be
flushed twice immediately and re-filled with a 50/50 mixture of DEX-COOL and clean water in order to preserve the enhanced properties and
extended service interval of DEX-COOL.
