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Re: '99 & later Silverado HVAC control diagnosis
Posted to Technical Tips Forum on 10/29/2002

Martin, hello,I have a 99 chevy blazer with a dead automatic climate control head,no operation of rear defogg,recirc,or ac...system just died!!

control module (head) has ign on voltage,constant batt voltage,and a good ground. are you familiar w/this system? ... Login to read more.