The Cummins ISX uses red ELC (extended life coolant).
Red, five year, hoat type. It is also called G05
Red 50/50 mix.
Red ELC.
The refrigerant is R134a.
Red ELC.
If it is in a Dodge truck, 2002 and prior is green. 2003 and later is red, 5 year, HOAT type.
Dexcool
Peterbilt's flagship truck, the 379, was in production from 1987 - 2007. It's hood was made from aluminum and it was the last conventional over-the-road truck available with this type of hood.
No, you must use the correct Honda Long Life Coolant Type 2 or a comparable fluid.
HOAT type coolant. Buy it at the dealer or the only HOAT aftermarket coolant I am aware of is Zerex GO-5 in the gold container.
Peterbilt truck
5.9 Cummins with 24 valves