2005 impala 3.4L over heating. Coolant fan only comes on if A/c is on.
I have a 2005 impala 3.4L. It over heats and only way to
keep temp down is to run a/c so that the coolant fan will
stay on, otherwise it never comes on. I have replaced
radiator, thermostat, temperature coolant sensor and all
fan relays with no luck. Any suggestions would be greatly
appreciated.