sorry, i have a 2001 with a 3.5 and around 130,000 on the clock. ive flushed the system and saw no blockages. i even unhooked the 2 hoses coming from the firewall and ran water and blew thru them to make sure the heater core wasnt blocked.
right now theres water in the system instead of coolant because i didnt want to waste $30 on dex-cool and the problem wasnt fixed.