Not to be rude, but why flush coolant on an 08 model truck? Does it have alot of miles. Otherwise, it seems unnecessary.
Okay, fair question. He has coolant for a cast iron block (green).
My friend hydro locked his original engine and recently had a guy put a 08 engine with 1000 miles (or so) in his truck. Now he wants to make it less obvious in case he has any warranty issues!
Well if he doens't have the original engine, then the dealer is gonna know as soon as they plug in the OBDII. Something tells me that if he has the money for a new engine then he's got the money to take care of any problems that may arise