Overheating trailblazer

Asked by Jun 21, 2019 at 01:05 AM about the 2003 Chevrolet TrailBlazer EXT

Question type: Maintenance & Repair

My trailblazer 4.2 i6 over heats after about 30 mins
of driving. Soon as I crank it up within 7 to 8 mins
the temperature is already at 210 or the middle. I
usually don’t let it get to the red line but i drive it
often (3-4 times a week) it starts to over heat every
time and I’ll pull over to let it cool then back on my
journey but I’ve replaced the fan clutch, fan shroud
, water pump, radiator, thermostat, checked all
hoses for leaks. it often gets so hot or to much
pressure that coolant drains on the ground from
the overflow hose on the rear of the expansion
tank. can some help

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