Also gets pressure in radiator quickly
My car overheats and gets pressure in radiator quickly. on 2005 Chevrolet Impala
Definitely check your coolant, if it is low, fill it, if it is leaking, check your bypass hose, they tend to wear out on the impalas. If none of this is your problem, it could be your water pump, thermostat, or several other things.
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You Have A Blown Head Gasket. Sorry.