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I have an 04 that did the same thing,I was driving home one night the h.v.a.c. pannel started flashing on and off then went out, pannel went black or blank ,next day did not work in morning but ride home that night came back on and has worked ever since.The only thing I can tell you was a relay on passenger side kick pannel was clicking while this was happening.Listen and check to see if you hear a relay clicking on your truck possibley bad relay !!!
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