Radiator flush

I have a Taco 2007 with 40000 miles.Does anyone knows when should I flush the radiator fluid?

 

It's Dexcool, so 5 years / 100,000 miles

 

didnt know this. good to know. I have 77k miles and was thinking about this.

 

I believe the service interval after that first change is shorter, maybe 60,000 miles.

 

Either way, use the toyota brand stuff, it has all the right additives and it will match color wise. Light pink or dark pink.
Check your water pump, while you're at it. Look for pink crust underneath. If present, the seal is leaking and the bearing will soon fail.