dexicool
The manufacture recommends Dex-Cool.
In most climates it takes 5W-30.
The 2001 Chevrolet Corvette has overhead valves (OHV).
The 2001 Chevrolet Malibu has overhead valves (OHV).
The 2001 Chevrolet Impala has overhead valves (OHV).
The 2001 Chevrolet Tahoe has overhead valves (OHV).
The 2001 Chevrolet Camaro has overhead valves (OHV).
The 2001 Chevrolet Express has overhead valves (OHV).
The 2001 Chevrolet Suburban has overhead valves (OHV).
Liquid coolant
The 2001 Chevrolet Express-Cargo has overhead valves (OHV).
The 2001 Chevrolet Silverado-2500HD has overhead valves (OHV).