01 Blazer no heat, no a/c. It has new rad, thermostat, is not over heating. When you turn the heat/ac **** you sometimes hear an electrical clicking in the dash which never happens when the blower motor went the last time ( current blower is 2.5 years old) before I start replacing parts wondering if this could be the blower again or something else. Any suggestions would be good. Don't want to spend money on parts I don't need as it's going for sale shortly.